Year 2018

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CHARACTER ASSOCIATION AND GENETIC DIVERSITY ANALYSIS IN POTATO (Solanum tuberosum L.)
(DEPARTMENT OF GENETICS AND PLANT BREEDING, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA-1207, 2018-06) HASAN, MD. MAHADY
The experiment was conducted with twenty genotypes of potato at the experimental farm of Sher-e-Bangla Agricultural University, Dhaka during the period from November2017 to March 2018 to estimate the genetic variability, correlation and diversity among the twenty (20) genotypes of potato. The experiment was conducted using Randomized Complete Block Design with three replications. All the twenty (20) genotypes varied significantly with each other for all the studied characters indicated the presence of considerable variations among the genotypes studied. The phenotypic co-efficient of variation ( PCV) values were higher than the respective genotypic coefficient of variation (GCV) values for all the characters under study. No of Secondary branches per plant, leaf breadth, no. of tuber per plant, individual weight of tuber, tuber yield per plant and yield (ton/ha) showed high heritability along with high genetic advance as percentage of mean were normally more helpful in predicting the genetic gain under selection. From the correlation analysis it was revealed that yield per ha was significantly positively correlated with secondary branches per plant, tuber per plant, individual tuber weight and tuber yield per plant at both genotypic and phenotypic levels suggesting that the selection for these traits would helpful for the improvement of yield per ha. As per principal component analysis (PCA), D and clusters analysis the genotypes were grouped into five different clusters. Clusters V had the maximum nine and cluster II and IV had the minimum one genotype. The highest inter-cluster distance was observed between II and IV and the lowest was observed between I and V. Genotypes in cluster II showed maximum performance for yield per ha, tuber yield per plant, individual tuber weight, tuber number per plant, tuber breadth, no of secondary branches per plant and plant height. Cluster III showed maximum performance for no of primary branches per plant and tuber length. Cluster V showed highest value for leaf length and leaf breadth. Considering this idea and other characteristic performances, genotype G19 (BARI Alu-46) from cluster II; genotype G18 (BARI Alu-41) and G2 (BARI Alu-49) from cluster I and G12 (BARI Alu-24) from cluster IV might be considered to suggest farmer for cultivation for better yield as well as use as parent for efficient hybridization programme for further improvement. 2
CHARACTER ASSOCIATION AND PATH ANALYSIS BASED ON MORPHOGENIC TRAITS IN ONION (Allium cepa L.) GENOTYPES
(DEPARTMENT OF GENETICS AND PLANT BREEDING, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA-1207, 2018-06) RIFAT, MD. MASHRUR HOSSAIN
The experiment was conducted in the research field of Sher-e-Bangla Agricultural University, Dhaka during December 2017 to April 2018 to investigate the character association and path analysis based on morphogenic traits in onion (allium cepa l.) genotypes in field condition. The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. Variability, mean performance, heritability, genetic advance, genotypic and phenotypic correlation coefficient and path analysis on different yield contributing characters and yield of onion genotypes were estimated. The highest bulb yield/plant (47.93 g) was recorded in the genotype of Laltir King, whereas the lowest bulb yield/plant (6.44g) from the genotype of BARI Piaj 2. Phenotypic coefficient of variation was higher than the genotypic coefficient of variation for all the yield contributing traits. In case of different varieties following highest heritability order has found; yield per bulb followed by leaf length > root length > plant height > dry weight per bulb > bulb diameter > no. of leaf > root length > bulb length> leaf breadth. In correlation study, yield per bulb positively and significantly correlated with plant height (0.43 and 0.45), root length (0.59 and 0.60), no. of leaves (0.82 and 0.72), leaf length (0.44 and 0.45), leaf breadth (0.47 and 0.48), bulb length (0.84 and 0.78), bulb diameter (0.65 and 0.65) and dry weight per bulb (0.98 and 0.89) at both genotypic and phenotypic levels respectively. Path coefficient analysis revealed that plant height (1.853), no. of leaves (0.11), bulb length (0.59), bulb diameter (0.32) and dry weight per bulb (0.21) had direct positive effect on yield per bulb, indicating these are the main contributors to yield per bulb. The genotypes Laltir king and Faridpuri may be selected for high yield, more dry weight of bulb, maximum bulb length, bulb diameter, no. of leaves, leaf length and plant height.
CHARACTERIZATION AND COMPARATIVE ASSESSMENT OF TEN ADVANCED LINES OF AUS RICE (Oryza sativa)
(DEPARTMENT OF GENETICS AND PLANT BREEDING, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA, BANGLADESH, 2018) KHANAM, ALIYA ADIBA
The present study was conducted at the experimental farm, Department of Genetics and Plant Breeding, Sher-e-Bangla Agricultural University, Dhaka during Aus season, 2017. The experiment was carried out to characterize and compare ten advanced Aus lines (F ) based on qualitative and quantitative traits. The lines were evaluated in RCBD with three replications. Thirty five qualitative and quantitative traits were used to characterize the advanced lines. Variation was observed in the traits like leaf pubescence, shape of the ligule, attitude of the blade of flag leaf, days to heading, days to maturity, 1000-grain weight, grain length (without dehulling), sterile lemma length, decorticated grain length (after dehulling), decorticated grain shape, culm length, panicle length and no. of effective tiller per plant among the lines. Maximum no. of effective tiller was found in L10 (12.10). Minimum days to heading was found in L1, L2, L3, L4, L5, and L10. Early maturity was found in L1, L2, L3, L4, L5, and L10. 1000 grain wt. was highest in L2, L4, L6, L7, and L8. Six lines (L1, L2, L3, L4, L5, and L10) showed early time of heading, early maturing and medium type of culm length. Five lines (L2, L3, L4, L6, and L10) were observed more effective tiller per plant (more than 10). Two lines (L7, L9) were observed having long panicle (26-30 cm). Highest total no. tiller per plant, no. of effective tiller per plant, yield per plant were observed in the line L10. It was concluded that the lines L10, L5, L3 and L4 can be selected for further study.
CHARACTERIZATION OF SOME ADVANCED LINES OF AMAN RICE (Oryza sativa L.) FOR RELEASE AS VARIETY
(DEPARTMENT OF GENETICS AND PLANT BREEDING, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA-1207, 2018-06) HASNAT, MD. KANOB
The investigation was carried out under field conditions to characterize thirteen advanced lines of aman rice during the period of aman season 2017 at the experimental field of Sher-e-Bangla Agricultural University, Dhaka. These thirteen advanced lines of aman rice were characterized for fifteen qualitative and nineteen quantitative traits. All the genotypes were characterized and categorized as Biodiversity international, IRRI and WARDA. 2007. Among the qualitative characteristics no variation was observed for basal leaf sheath color, leaf blade pubescence, ligule shape and all the genotypes were green, pubescent, 2- cleft type respectively. All the genotypes were lodging resistance. Only two types of ligule and auricle color viz. whitish and yellowish green were found. Among thirteen genotypes ten genotypes viz. (G01, G05, G06, G07, G08, G09, G10, G11, G12 and G13) had well exerted type panicle. Only G08, G09 and G12 were partly awned and G11 was fully awned. Among the quantitative characteristics no variation was observed in case of grain length and grain width and all the genotypes had similar type extra-long (9.10mm) and fine (1.76mm) width grain. Average culm length was 110.24 cm and G06, G09 and G10 showed intermediate to long type’s culm length. Genotype G11 showed the highest tiller number as well as effective tillers per hill (21.1 culms and 20.53 culms respectively). Long panicle length with higher number of grains per panicle which were the agronomic superiority. The average panicle length was 27.17 cm and mean total grain was 175.15 per panicle which contributed to an average yield of 35.5 g per plant. G05 showed the highest yield but there were no significant difference among the genotypes G01, G05, G08 and G09 and G11 showed short maturity duration.
COMPARISION OF YIELD AND YIELD CONTRIBUTINGCHARACTERS OF 13 ADVANCED POPULATIONS OF BRASSICA RAPA L.
(DEPARTMENT OF GENETICS AND PLANT BREEDING, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA-1207, 2018-06) NATH, ANWESHA SHREOSHI
A research was conducted in the experimental farm of Sher-e-Bangla Agricultural university, by using ten F 6 , one F 15 & two F 16 populations during November 2017-February 2018. The purpose of the experiment was to study variation in yield, numbers of seed per plant of the F 6 , F 15 and F 16 select the plant with higher yield and short duration. Mean performance, range and CV (%) of seed yield and yield contributing characters confirmed that there were considerable variation existed among the genotypes used in the experiment. The values of phenotypic variances were higher compared than the genotypic variances. Days to 50% flowering, 80% days of maturity, number of branches, number of secondary branches, number of siliqua per plant, number of seeds per plant, thousand seed weight and yield per plant showed least differences between genotypic and phenotypic variation. Moreover, the thirteen advanced populations of Brassica rapa showed significant variation in mean which provided opportunity to select promising populations for further higher yield trial. Two short duration and desired high yield populations were selected. They were SAU 2 x BARI 6 (F 6 , S 4 ) and BARI 9 x BARI 6 (F 16 , S 5 , early). For future trial BARI 9 x BARI 6 (F 16 , S 5 , early) can be selected as a parent. materials to
COMPARISON AMONG EIGHT ADVANCED POPULATIONS FOR YIELD AND YIELD CONTRIBUTING TRAITS OF Brassica rapa L.
(DEPARTMENT OF GENETICS AND PLANT BREEDING, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA-1207, 2018-06) ULLAH, AHMAD
The research was based on the evaluation of eight advanced populations of Brassica rapa L. received from the Department of Genetics and Plant Breeding, Sher-e-Bangla Agricultural University, Dhaka, considering 10 yields and yield contributing traits, using randomized complete block design
EVALUATION OF TOMATILLO (Physalis ixocarpa Brot./Physalis philadelphica) GENOTYPES AGAINST DROUGHT
(DEPARTMENT OF GENETICS AND PLANT BREEDING, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA-1207, 2018-06) SULTANA, SHARMIN
A pot experiment was conducted near the net house of the Department of Genetics and Plant Breeding, Sher-e-Bangla Agricultural University, Dhaka1207, during the months of October 2017 to March 2018 to observe the performances of four tomatillo genotypes under three different drought treatments. Two factorial experiment including four tomatillo genotypes viz., G 1 (SAU Tomatillo 1), G 2 (PI003), G 3 (SAU Tomatillo 2) and G 4 (PI004) and three drought treatments viz., T 1 (Control), T 2 (30 days withholding of water/moderate stress) and T 3 (45 days withholding of water/severe stress) were outlined in completely randomized design (CRD) with five replications. Days to first flowering, days to maturity, plant height (cm), number of fruits per plant, average fruit weight per plant (g), leaf length (cm), leaf width (cm), leaf length × width (cm 2 ), leaf length/width, number of seeds per fruit, average fruit length (cm), average fruit diameter (cm), yield per plant (kg), relative water content, RWC (%), proline content (µg/g), Brix (%) and Vitamin C content were studied in the experiment. The results showed that both the tomatillo genotypes and drought treatments had significant influence independently and dependently on agromorphogenic, physiological, antioxidant and nutritional traits of tomatillo plant. Most of the traits responded negatively as the drought level increased except days to first flowering, days to maturity, leaf L/W, proline content (µg/g) and Brix (%). Among the genotypes, G 1 could be cultivated at moderate drought condition for early harvesting, the highest average fruit weight, maximum yield, maximum proline content and maximum Brix (%) content. Regarding antioxidant and nutritional traits such as for Vitamin C content, G 3 could be recommended for moderate as well as severe drought stress regions in Bangladesh. These genotypes (G 1 and G 3 ) could also be used in future hybridization programs.
GENETIC ANALYSIS IN YIELD AND ITS CONTRIBUTING CHARACTERS IN F₅ POPULATION OF Brassica napus L.
(DEPARTMENT OF GENETICS AND PLANT BREEDING, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA-1207, 2018-06) BHUIYAN, FARZANA ALAM
Thirty two F 5 population of Brassica napus L. were evaluated. The experiment was laid to study the variability, correlation, path analysis and genetic diversity. The genotypes were found significantly variable for most of the characters. Phenotypic variances were higher than the genotypic variances for most of the character studied. The high GCV value was observed for number of secondary branches per plant (43.11). Number of secondary branches (98.67) exhibited the highest value of heritability followed by seed yield per plant (98. 43) while days to maturity (88.23) exhibited the lowest value of heritability. The significant positive correlation with seed yield per plant were found with all most all the characters except days to 50% flowering (0.034) and days to maturity (-0.095). Path co-efficient analysis revealed that days to 50% flowering, number of secondary branch, number of siliqua per plant, number of seed per siliqua, and thousand seed weight had the positive direct effect on yield per plant whereas days to 80% maturity, plant height, number of primary branch and siliqua length had the negative direct effect on yield per plant. On the basis of cluster analysis, all the genotypes were classified in five clusters.The highest inter cluster distance was observed between cluster I and IV(10.311). The lowest intercluster distance (3.513) was observed between the cluster III and IV (3.521). Considering group distance and other agronomic performance genotypes Nap-248 X Nap-159, Nap-2037 X Nap-2057, Np-9908 X Np-2022, Nap-2012 X Nap-2022, Bs13 X Nap-2022 and Bs-7 X Nap-206 might be suggested for future breeding program.
GENETIC DIVERSITY ANALYSIS OF SWEET POTATO (Ipomoea batatas (L.) Lam.) BASED ON YIELD AND QUALITY TRAITS
(DEPARTMENT OF GENETICS AND PLANT BREEDING, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA-1207, 2018-06) RAHMAN, TANJINA
An experiment conducted to study the genetic variability analysis based on different yield contributing and quality traits of sweet potato genotypes in Sher-E-Bangla Agricultural University, Dhaka-1207, Bangladesh during Rabi season
GENETIC DIVERSITY AND CHARACTERS ASSOCIATION ANALYSIS OF ADVANCED LINE OF Brassica napus L.
(DEPARTMENT OF GENETICS AND PLANT BREEDING, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA-1207, 2018-06) KHATUN, AZIZA
A field experiment was conducted with 26 BC₁F 6 genotypes of Brassica napus L. at the experimental field of Sher-e-Bangla Agricultural University, Dhaka to study the Genetic diversity and characters association analysis of advanced line of Brassica napus during November 2017 to March 2018. The populations were found significantly variable for all the characters. Comparatively phenotypic variances were higher than the genotypic variances for all the characters studied. PCV was higher than the corresponding genotypic coefficient of variation (GCV) for all the traits studied. Higher estimates of PCV than GCV were observed for all the traits. PCV ranged from 1.32% for Days to maturity to 28.46% for Secondary branches per plant and GCV from 0.95% (Days to maturity) to 17.88% (seed yield per plant) The high PCV value was observed for number of secondary branches per plant (28.46%), siliqua per plant (15.43%), 1000 seed weight (13.39%). Seed yield per plant showed high broad base heritability (61.07). The significant positive correlation with seed yield per plant was found with days to flowering (0.319 and 0.070) and siliqua length (0.068 and 0.015). Path coefficient analysis revealed that days to flowering (1.180), plant height (0.009), secondary branches per plant(0.210), number of siliqua per plant (0.493), siliqua length (0.498) and seeds per siliqua (0.005) had the positive direct effect on yield per plant. By genetic divergence analysis Eigen values of principal component axes of coordination of genotypes with the first axes totally accounted for the variation among the genotypes (29.70%) and three PCA account for (61.00%) of the total variation The genotypes were grouped into five clusters. Cluster II contained the large no. of genotypes (11) and cluster III contained only one (1). The cluster V had higher intra cluster distance (2.44) that indicates the highest amount of genetic divergence within the group. The maximum inter cluster distance was observed between genotypes of cluster III and IV (16.453) followed by clusters II and III (11.693). Under cluster III genotypes possessed early maturity, highest plant height, more primary and secondary branches per plant, more siliqua per plant and short siliqua. Considering group distance and other agronomic performance genotypes G1, G2, G13, G15, G18, G19, G21 and G24 might be suggested for future hybridization program.
GENETIC DIVERSITY, CORRELATION AND PATH CO-EFFICIENT ANALYSIS OF WHITE MAIZE (Zea mays L.)
(DEPARTMENT OF GENETICS AND PLANT BREEDING, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA-1207, 2018-06) ROY, GOUTOM
Seventeen white maize inbreed lines were collected from CIMMYT, Mexico and Bangladesh and laid out in Randomized Complete Block Design (RCBD) with three replications in the experimental farm of Sher-e-Bangla Agricultural University, Dhaka during October, 2016 to April, 2017. Mean performance, variability, correlation matrix and path analysis on different yield contributing characters and yield of maize inbreed line were calculated. The mean performance of the maize inbreed lines showed that the maximum grain yield/plant (170.01 g) was recorded in the genotype of CLTHW15008, whereas the minimum grain yield/plant (44.52 g) was recorded in CLTHW15007. The phenotypic co-efficient of variation was higher than the genotypic co-efficient of variation for all the yield contributing traits. In correlation study, significant positive association was recorded for grain yield/plant with base diameter of plant (1.00), leaf breadth (1.00), cob length (0.979), cob diameter (0.930), number of row per cob (0.979), number of grain per row (0.999), 100-grain weight (0.992). Path analysis revealed that plant height (0.412), leaf breadth (0.073), days to 50% flowering (0.280), number of rows per cob (0.462), number of grain per row (0.209) had positive direct effect on yield/plant. Base to cob distance (-0.214), base diameter (-0.614), leaf length (-0.467), days to maturity (-0.262), cob length (-0.725), cob diameter (-0.355), 100-grain weight (-0.472) had negative direct effect on grain yield. In diversity analysis the clustering pattern denoted that, cluster II was the largest cluster comprising of 6 genotypes and cluster III belonged to 4 genotypes of maize. The maximum inter-cluster divergence was observed between cluster I and V (58.22) followed by cluster I and III (48.35). Considering diversity pattern, genetic variability and other agronomic performance CLTHW15008 from cluster I; CLTHW15004, CLTHW15005, CLTHW15006, CLTHW15015 from cluster II might be considered as potential parents for hybridization program for further improvement of the crop.
GENETIC EVALUATION OF BORO RICE (Oryza sativa L.) UNDER IRRIGATED AND RAINFED CONDITION
(DEPARTMENT OF GENETICS AND PLANT BREEDING, 2018) JOMADDER, MD. NAYEEM
Drought is a major abiotic constraint for growing rain-fed rice in Bangladesh. A set of twenty rice genotypes including local boro rice genotypes viz., Poshusail, Gorchihail, Birion, Soilerpuna, Pankaich, Gopal Deshi, Borail were evaluated under irrigated and rainfed condition at farm of the Sher-e- Bangla Agricultural University, Dhaka-1207 during December 2018 – May 2019. Ten morphological characters viz, plant height (cm), flag leaf length (cm), flag leaf width (cm), number of primary branches per panicle, number of secondary branches per panicle, panicle length (cm), number of filled grain per panicle, number of unfilled grain per panicle, thousand seed weight (g) and yield (ton/ha) were recorded. Analysis of variance revealed highly significant variation among the genotypes for all the characters under study in both conditions (irrigated and rainfed). The effects of water deficit on various morphological traits associated with drought tolerance were also studied. Result revealed that significant yield decline was observed almost in all rice genotypes grown under rainfed condition compared to normal irrigated situation. Out of twenty rice genotypes, BRRI dhan36, BRRI dhan59, BRRI dhan55 showed superior performance in terms of grain yield and yield attributes under normal irrigated condition. Under rainfed condition, the genotypes namely BRRI dhan55, Gopal Deshi, Soilerpuna showed superior performance in terms of grain yield and yield attributes. Significant variation was also observed among the genotypes for plant height, flag leaf length (cm), flag leaf width (cm), number of primary branches per panicle, number of secondary branches per panicle, panicle length (cm), number of filled grain per panicle, number of unfilled grain per panicle, thousand seed weight (g) and yield (ton/ha) and drought tolerance index under both normal (irrigated) and rainfed condition. The present study also indicated the agro-morphological traits had direct and indirect effect on yield performance of rice genotypes under rainfed condition at reproductive stage.
GENETIC STUDY ON YIELD AND QUALITY TRAITS OF ADVANCED BREEDING POPULATIONS IN Brassica rapa L.
(DEPARTMENT OF GENETICS AND PLANT BREEDING, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA-1207, 2018-06) KARMOKAR, DEBOSREE
The experiment was conducted with 13 advanced breeding populations of Brassica rapa L. during rabi season from November 2017 to February 2018 in research farm of Sher-e-Bangla Agricultural University to evaluate morphological and biochemical traits of the selected populations. The analysis of variance showed significant variation in all the traits. High genotypic and phenotypic coefficient of variation was observed for the characters viz; number of secondary branches per plant, number of siliquae per plant and yield per plant. High heritability coupled with high genetic advance in percent of mean was found for days to 50% flowering, number of secondary branches per plant, siliqua per plant, number of seeds per siliqua and yield per plant. The correlation studies revealed that yield per plant had highly significant positive relation with number of primary branches per plant, secondary branches per plant and number of siliquae per plant at both genotypic and phenotypic level. Path analysis showed that siliquae per plant had highly significant and positive direct effect on the yield per plant. Biochemical analysis of various fatty acids of five populations was done. Among the populations lowest amount of palmitic, stearic and erucic acid was found in P7 (Tori-7 x BARI sarisha-15 F 6 ) (1.68%), P9 (BARI sarisha-9 X BARI sarisha-6 S 5 ) (0.49%) and P12 (SAU sarisha-1 X BARI sarisha-15 F 6 ) (54.08%) respectively. The highest amount of oleic, linoleic and linolenic acid was found in P12 (15.16%), P13 (BARI sarisha-6 X BARI sarisha-15 F 9 ) (14.27%) and P13 (8.65%) respectively. In case of short duration P1 (SAU sarisha-2 X BARI sarisha-15 F 7 ) (78.00 days) showed the best result. Higher yield per plant was found in P1 (7.31 g), P9 (6.53 g) and P12 (5.40 g) chronologically. Among the populations P1 was found as the best on the basis of days to 80% maturity, number of secondary branches per plant, number of siliquae per plant and yield per plant. Based on biochemical analysis for saturated fatty acids populations P7 and P9 were good. For unsaturated fatty acids population P12 was better enough than other populations. By comparing, it might be concluded that populations P1, P7, P9 and P12 had potential for improvement based on yield contributing traits and fatty acid content. F 15
GENETIC VARIABILITY AND CHARACTER ASSOCIATION OF SOYBEAN (Glycine max L. Merr.)
(DEPARTMENT OF GENETICS AND PLANT BREEDING, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA, BANGLADESH, 2018) HASAN, MAHMUDUL
The present research work was conducted to study the genetic diversity analysis of soybean during the period from December 2017 to May 2018 in rabi season in the experimental field of Sher-e-Bangla Agricultural University, Sher-eBangla Nagar, Dhaka. In this experiment, 22 soybean genotypes were used as experimental materials. Mean performance, variability, correlation, path analysis and genetic diversity analysis on different yield attributes and yield of soybean genotypes was estimated. Analysis of variance for each trait showed significant differences among the genotypes except pod wide, seed per pod, seed yield per plot and seed yield per hectare. In correlation study, highly significant positive association was recorded for seed yield of soybean genotypes with first flowering, days to 50% flowering, days to physiological, days to harvest maturity, plant height, number of branch per plant, number of pod per plant, seed yield per plant and yield per plot. Path coefficient analysis evidenced that 50% flowering, day to physiological maturity, plant height, number of branch per plant, pod per plant, 100 seed weight and yield per plot had the positive direct effect on yield per plant. Therefore, importance has to be given for these characters in the further breeding program to improve soybean yield. Multivariate analysis based on fifteen characters of twenty-two soybean genotypes was divided into three distant clusters. The maximum contribution of traits towards diversity was observed by first flowering, days to 50% flowering, days to physical maturity, days to harvest maturity, plant height, number of main branches per plant and pod length. As a result, these traits could be emphasized during the selection of parents for hybridization. The highest inter-cluster distance was observed between cluster I and II and the maximum intra cluster distance was found in cluster I. Considering group distance and other agro-morphogenic performance, genotypes G2 (GM0009) and G13 (GM0014) found the potential for future hybridization program in the response of increase soybean yield.
GENETIC VARIABILITY AND CHARACTER ASSOCIATION OF YIELD AND YIELD CONTRIBUTING CHARACTERS IN MAIZE (Zea mays L.)
(DEPARTMENT OF GENETICS AND PLANT BREEDING, 2018) JAHAN, LABIBA
Thirty maize genotypes were studied in RCBD with three replication for the variability and character association of yield and yield related traits at Sher-eBangla Agricultural University, Dhaka during January to May, 2019. Significant variations were observed among the genotypes for all the traits studied. Among the genetic parameters, high GCV values were observed for kernels per cob 6 2 analysis and cluster III consist of highest eight genotypes. The maximum inter-cluster divergence was observed between cluster I and V
GENETIC VARIABILITY AND CHARACTER ASSOCIATION OF YIELD COMPONENTS IN MAIZE
(DEPARTMENT OF GENETICS AND PLANT BREEDING, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA-1207, 2018-06) KHAN, MST. SUMAYEA
The research investigation was carried out in the experimental area of Sher-eBangla Agricultural university, Sher-e-Bangla Nagar, Dhaka-1207, during the late Rabi season Mid December to May 2018 to study the genetic variability and character association of yield components in Maize with35 maize genotypes as experimental materials that was laid out in Randomized Complete Block Design
GENETIC VARIABILITY STUDIES OF GREEN CHILLI (Capsicam frutensences L.)
(DEPARTMENT OF GENETICS AND PLANT BREEDING, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA-1207, 2018-06) KABIRAJ, ANTARA
In order to evaluate the variability and genetic diversity of chilli the present experiment was carried out during the period from November 2017 to April 2018 at the experimental farm of the Department of Genetics and Plant Breeding, Sher-e-Bangla Agricultural University, Dhaka. It was involved with 28 genotypes of chilli of different origin/sources. The experiment was laid out in Randomized Complete Block Design
GENETIC VARIABILITY, CHARACTER ASSOCIATION AND PATH ANALYSIS IN F 3 SHORT STATURE POPULATIONS OF WHITE MAIZE (Zea mays L.)
(DEPARTMENT OF GENETICS AND PLANT BREEDING, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA-1207, 2018-06) SHOMPA, BODRUN NESSA
The investigation was carried out with 24 F 3 white maize populations to study the genetic variability, character association and finally to select the short duration and dwarf promising populations based on yield and yield contributing traits at Sher-e-Bangla Agricultural University, Dhaka during November 2017 to March 2018. Significant variations were observed among the F 3 populations for all the traits studied. The F 3 population of KS-510-F 3 -S 2 showed the maximum mean performance in plant height (220.61 cm), cob length (19.65 cm), number of grains per row (33.83), while the population of Youngnuo-7F 3 -S 1 showed the minimum mean performance in plant height (122.33 cm), cob height (53.00 cm), base diameter (6.10 cm). The population PSC-121-F 3- showed the maximum yield per plant (97.67), while Youngnuo-7-F 3 showed the minimum yield per plant (46.94). In analysis of different genetic parameters the highest genotypic coefficient of variation (GCV) and phenotypic coefficient of variation (PCV) values were observed for cob height (20.99, 21.55), leaf blade area (19.20, 20.31), yield per plant (19.04, 22.59). High heritability coupled with high genetic advances in percent mean were obtained for plant height, cob height, number of cob bearing node, leaf blade area, number of grains per row and yield per plant. Correlation studies revealed that yield per plant positively and significantly associated with plant height, base diameter, number of leaves per plant, cob length, cob diameter and number of grains per row at both genotypic and phenotypic levels. Path coefficient analysis indicated positive direct contribution towards yield per plant through plant height, base diameter, branches of tassel, leaf blade area, cob length, cob diameter, number of rows per cob, number of grains per row and 100 grain weight. Based upon the mean performance among the 24 F 3 -S 1 segregating population, PSC-121-F 3 and KS-510-F 3 -S 1 would be selected for high grain yield per plant. Again Youngnuo-7-F 3 -S 2 and Changnuo-1-F 3 -S 1 might be selected as promising for both of the traits short duration and dwarf plant stature. S 2 -S 2
GENETIC VARIATION AND CHARACTER ASSOCIATION IN F 5 ADVANCED POPULATIONS OF Brassica napusL.
(DEPARTMENT OF GENETICS AND PLANT BREEDING, 2018) KEYA, KANIZ FATEMA
A research was conducted by using fourty four advanced populations ofBrassica napus and grown in the experimental farm of Sher-e-Bangla Agricultural University, Dhaka to study the genetic variability, heritability, correlation and path coefficient analysis during November 2017 to February 2018. Analysis of variance revealed significant variations among the genotypes for all the traits studied. For most of the character the genotypes were found significantly variable. Phenotypic variances were comparatively higher than the genotypic variances for all the studied characters. PCV were higher than the GCV for all the characters studied. Plant height 5
GENOTYPE AND ENVIRONMENT INTERACTIONS IN YIELD CONTRIBUTING CHARACTERS OF MUSTARD (Brassica rapa L.)
(DEPARTMENT OF GENETICS AND PLANT BREEDING, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA-1207, 2018-06) MONDAL, SUSMITA
The experiment was conducted in the experimental field of Sher-e-Bangla Agricultural University, Dhaka during October, 2017 to April, 2018. The objective of this study was to assess the genotype and environment interactions for yield and yield contributing characters of mustard varieties grown in Bangladesh through the AMMI (additive main effects and multiplicative interaction) model. The study comprised of eleven (11) mustard varieties of Brassica rapa released by BARI and BINA and three (3) environments laid out in randomized complete block (RCBD) design with three replications. The environments were three sowing times viz., optimum (Env-1), late (Env-2) and very late (Env-3) sowings of eleven mustard varieties. The results of combined analysis of variance (ANOVA) revealed significant differences between genotypes and environments as main effects. Genotype and environment interactions both linear and non-linear components were highly significant for most of the parameters except number of seeds per siliqua and hundred seed weight. The results also suggested that Env-3 was poor and Env-1 and Env-2 were found rich and favorable for mustard production. The IPCA1 (First Interaction Principal Component Axis) scores of a genotypes in the AMMI analysis used as an indication of the stability or adaptation over environments. The greater the IPCA1 scores indicated the better adaptation of a genotype to certain environments. Hence, considering the IPCA1 scores BARI Sharisha-9, BARI Sharisha-15, Maghi and Improved Tori were low yielding and unstable, while BARI Sharisha-6, BARI Sharisha-17 and BINA Sharisha-9 were shown high yielding but unstable genotypes. Again, Env-1 was found as rich environment where, BARI Sharisha-17, BINA Sharisha-9 were shown highly responsive to the environment (Env-1). BARI Sharisha-12 was found intermediate yielding and stable variety. As a whole, Sonali Sharisha-75 and BINA Sharisha-10 were found as high yielding and stable varieties and Env-1 and Env-2 were more favorable for the mustard production.