Year 2012
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Item AGRONOMIC AND GENETIC PERFORMANCE OF HYBRID MAIZE (Zea mays L.) VARIETIES INFLUENCED BY THREE LEVELS OF IRRIGATION(DEPARTMENT OF GENETICS AND PLANT BREEDING, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA, BANGLADESH, 2012-07) BHUIYAN, MOHAMMAD SARFUDDINThe present piece of research work was carried out at the field of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka- 1207. from December 2010 to May 2011 to determine optimum water requirement for the cultivation of hybrid maize varieties. There were two factors in this experiment, a) four hybrid maize varieties: V1 (BAR! Hybrid Maize-5). V2 (Pacific 60), V3 (NK 40) and V4 (Ajanta) and b) three levels of irrigation: 11 = Two irrigations at 25 and 50 DAS, 12 = Three irrigations at 25. 50 and 75 DAS and 13 = Four irrigations at 25, 50, 75 and 100 DAS. respectively. Selected varieties and irrigation levels individually had a few significant effects on the pimit characteristics of maize but had significant effect on yields and yield contributing characters. Almost all the plant and yield contributing characters were significant except days to 6 leaf stage and days to bud initiation stage. The higher yields were recorded in V1 13 (7.92 t ha'), V413 (7.83 t ha') and V213 (7.45 ha') which were statistically identical with V112 (7.40 t hi'), V2I2 (6.87 t ha') and V412 (6.80 ha), respectively. The highest water use efficiency (0.122 t ha4cm 1) was found in V211 treatment combination followed by V111 (0.121 t ha'cm'), V112 (0.120 t hi'cm'). The highest benefit cost ratio (BCR) was obsen'ed (2.37) in both V113 and V112 treatment combination. BAR! Hybrid Maize-S performed better among the four varieties tested in this experiment. Moreover, total average water saving in one hectare land for maize cultivation by adopting 12 irrigation treatment over Ij is 4,49.837 gallons. Among the treatment combinations, V112 (BARI Hybrid Maize-5 with three irrigations at 25. 50 and 75 DAS) was the best combination for maize cultivation.Item INTERCENOTYPIC VARIATION AMONG ADVANCED LINES OF Brassica rapa(DEPARTMENT OF GENETICS AND PLANT BREEDING, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA, BANGLADESH, 2012-07) FARHANA, NAHIDA field experiment was conducted in the experimental field of Genetics and Plant Breeding field laboratory of Sher-e Bangla Agricultural University, Dhaka. Bangladesh during the period of October 2010 to March 2011 to study the inter genotypic variation among advance lines of Brassica rapa. The experiment was carried out to study variability, heritability, genetic advance and genetic advance in percentage of mean, genetic diversity, character associations and direct and indirect effect of different traits on yield. Seeds are sown in the field in Randomized Complete Block Design (RCBD) with three replications. There was a great deal of significant variation for all the characters among the genotypes. Considering genetic parameters high genotypic co-efficient of variation (CCV) was observed for no. of secondary branch, seed yield per plant and seed yield per hectare whereas low GCV was observed for length of siliqua and thousand seed weight. In all cases, phenotypic variances were higher than the genotypic variance. High heritability with high genetic advance in percent of mean was observed for yield per plant indicating that this trait was under additive gene control and selection for genetic improvement for this trait would be effective. The results obtained, showed that seed yield per hectare had highest significant positive correlation with yield per plant. Seed yield per plant had also significant positive correlation with seed per siliqua at genotypic level. Considering group distance and other agronomic performance the inter genotypic crosses between 016 and 018; GlO and Gl9 016 and G22: G16 and 028 may be suggested for future hybridization program. So, these are found the important characters and could be used on direct selection for yield.Item Genetic Diversity Analysis For Physiological Traits in RADISH (Raphanus sativus L)(DEPARTMENT OF GENETICS AND PLANT BREEDING, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA, BANGLADESH, 2012-07) ALAM, MD. MONIRULA field experiment was conducted at the Agricultural Farm of Sher-e-Bangla Agricultural University, Sher-e-l3angla Nagar, Dhaka, Bangladesh during the rabi season of November 2011 to February 2012 to characterize and genetic diversity analysis of 21 radish varieties based on some physiological characters. Four distinct clusters were observed among the radish varieties on the basis of total dry matter (TDM), relative growth rate (RGR). crop growth rate (CGR). leaf area index (LAI), net assimilation rate (NAR), leaf area ratio ([AR). leaf weight ratio (LWR), leaf number per plant, harvest index (HI), days to harvest and root yield per plant. Cluster IV consisted of the highest number of varieties, viz.. Mino Early Long White (Ufsi Mula), BARI Radish-S (Druti), Mino Long White, Early White-35, Chaniak, Nong Woo Bio (F1 hybrid), Radish Royal- 40, White Prince (F1 hybrid radish). Cluster II composed of Lucky (Early 35 Days), Paira-40, Bright White 40, Rupsa, Tasakisan (China). Rocky-45. Cluster III composed of Snow White (IF1 hybrid). BARI Radish-2 (Pinky), BARI Radish4. Barisal Local, Ramboo-40. BARI Radish-I (Tasakisan) and Ivory White formed cluster 1. The highest root yield was observed in cluster 1(380.06) which also produced the highest 1DM and [Al. The longest cluster distance was observed between cluster I and cluster II. Clustering pattern was not influenced by the genotypic origin. Ivory white produced the highest root yield, TDM, and LA! which was followed by BARI radish-I. Ivory white did not flower in growing season. BARI radish-2 produced the highest ROR and NAR. Rupsa produced the highest harvest index. Leaf area index, LAR, LWR and leaf number per plant were the major components of genetic divergence in the radish varieties. Considering genetic diversity and other performances. BARI radish-I, BARI radish-2 and Rupsa appear to be promising parents for future hybridization program.Item VARIABILITY, CORRELATION AND PATH COEFFICIENT ANALYSIS IN BC1 F1 GENERATION OF Brassica napus L.(DEPARTMENT OF GENETICS AND PLANT BREEDING, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA, BANGLADESH, 2012-07) ASADUZZAMAN, MIRThe experiment was conducted with thirty four BC1F, progenies of Brassica napus and one check variety at the experimental farm of Sher-e-Bangla Agricultural university. Dhaka- 1207, during november, 2010 to March, 2011 to study the variability, correlation and path analaysis in BC, F, generation of Brassica napus. Comparatively phenotvpic variances were higher than the genotypie variances for all the characters studied. The high OCY value was observed for number of secondary branches per plant. High heritability with low genetic advance in percent of mean was observed for number of seeds per siliqua, siliqua length and thousand seed weight indicating that non-additive gene effects were involved for the expression of these characters and selection for such traits might not be rewarding. Iligh heritability with high genetic advance in percent of mean was observed for number of siliqua per plant and seed yield per plant indicating that these traits were under additive gene control and selection for genetic improvement for these traits would be effective. The results of correlation revealed that yield per plant had positive association with plant height, days to 50% (lowering and days to maturity. Path co-efficient analysis revealed that plant height, days to 50% flowering, days to maturity and thousand seed weight had the positive direct effect on yield per plant. Whereas, number of primary branches per plant, number of secondary branches per plant, number of siliquae per plant, number of seeds per siliqua and siliqua length had the negative direct effect on yield per plant.Item GENETIC STUDIES ON YiELD & YIELD CONTRIBUTING CHARACTERS IN F2 DIALLEL POPULATION OF Brassica napus L(DEPARTMENT OF GENETICS AND PLANT BREEDING, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA, BANGLADESH, 2012-07) ATIKUNNAHER, MST.An experiment on oleiferous Hra.s'sica napus L. was conducted at the experimental field to evaluate diallel analysis for ten different characters. Out of fifteen crosses, the parent Nap-9908 was the best general combiner for number of siliquae per plant, seed per siliqua and seed yield per plant. The parent Nap-205 was the best general combiner for plant height parent Nap-9901 was the best general combiner for days to maturity and Nap-lOS for number of primary branches per plant. The parent Nap-9905 was the best combiner for siliqua length and parent Nap-I 30 for thousand seed weightlhe higher magnitude of (JC'A variance was observed than that of SCA variance for plant height days to maturity, no. of primary branches per plant, number of siliquae per plant, siliqua length, seeds per siliqua, seed yield per plant and thousand seed weight. The SCA estimates of various characters revealed that Nap-9908 x Nap- 130 was the best combination for plant height Nap-9905 x Nap-205 for no. of primary branches per plant. Nap-9901 x Nap-205 for secondary branches, Nap-9908 x Nap-9901 for number of siliqua per plant. Nap-9901 x Nap-205 for siliqua length. Nap-9901 x Nap-205 for seeds per siliqua, Nap-9905 x Nap-205 for seed yield per plant and Nap-lOS x Nap-9908 for thousand seed weight were the best cross combinations. The Vr-Wr graph indicate over dominance for plant height, days to flowering, primary branches per plant siliquae per plant, seeds per siliqua, siliqua length and thousand seed weight. Partial dominance was observed for secondary branches per plant and seed yield per plant. The graphical analysis also indicates wide genetic diversity among the parents.Item CHARACTERIZATION AND DIVERSITY ANALYSIS OF TOMATO (Solanurn lycopersicuni L.)(DEPARTMENT OF GENETICS AND PLANT BREEDING, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA, BANGLADESH, 2012-07) ISLAM, MD. RAFIQULA field experiment was conducted at the experimental field of Sher-e-Bangla Agricultural University, Dhaka. during October 2011 to April 2012. Thirty genotypes of tomato (So/anton lycopersicum L.) were studied in the present study. The objectives of the study were characterization and diversity analysis of tomato to assess the magnitude of genetic divergence in genotypes, association among the characters and their contribution to yield. The analysis of variance indicated significantly higher amount of variability among the genotypes for all the characters. Considering genetic parameters high genotypic coefficient of variation (GCV) was observed for number of fruits per cluster (44.55), fruit weight (59.12) and fruit yield per plant (40.52) where as days to first flowering (0.75) and days to 50% flowering (2.48) showed low GCV. in all cases, phenotypic variances were higher than the genotypic variance. High heritability with low genetic advance in percent of mean was observed for days to first flowering (DFF), days to 50% flowering . plant height (PH), number of branches per plant (BPP), number of cluster per plant (NCP), number of fruits per plant (FPP), fruit length (FL) and fruit yield per plant (FYP) which indicated that non-additive gene effects were involved for the expression of these characters and selection for such traits might not be rewarding. High heritability with high genetic advance in percent of mean were observed for number of fruits per cluster (FPC) and fruit weight (EW) indicating that there traits were under additive gene action and selection for genetic improvement for this trait would be effective. The results showed that fruit yield per plant had high positive and high significant relation with fruit weight and fruit length but high negative and significant relation with days to first flowering (l)FF) and number of clusters per plant (NCP). Days to first flowering (DFF). Days to 50% flowering. number of fruits per plant (FPP). fruit weight (FW) and fruit length (FL) had high positively direct effect on yield of tomato. So, these are found the important characters and could be used on direct selection for yield. Considering all the characters; 02 (1313-7260), 04 (80-7270). G (BD-7276). G6 (1313-7278). G15 (1313-7295), 022 (BO- 7762). G (BARI Tornato-3), G25 (BARI Tomato-). G (BARI Tomato-7), ("27 (EARl Tomato-9), 029 (BARI Tomato-14), and G (PUSA Rubi) can be selected for future breeding program.Item GENE ACTION AND HETEROSIS THROUGH LINE x TESTER ANALYSIS IN Brassica napus L.(DEPARTMENT OF GENETICS AND PLANT BREEDING, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA, BANGLADESH, 2012-07) AFROSE, RASHMAThe study was conducted to evaluate five female parents (lines) and eight male parents (testers) in a line x tester mating design at the research field of Sher-e-Bangla Agricultural University. Dhaka during November 2011 to April 2012 to estimate their gene action and heterosis. The data recorded on 40 F1 's and their parents for their combining ability indicated that GCA effect was significant for plant height, primary branches and secondary branches per plant, days to fifty percent flowering, days to fifty percent maturity, no. of siliqua per plant, length of siliqua, seeds per siliqua, thousand seed weight and seed yield per plant. High ratio of GCA and SCA variance was observed indicating preponderance of non additive gene effects in the inheritance of the yield and yield contributing characters under study. Among the lines Nap 9908 and Nap 94006 were found as good general combiners. Among 40 hybrids 16 were found as good specific combiner for yield and other characters. Different types of heterosis i.e. heterosis over mid parent (1-Im), heterosis over better parent (Hb) and heterosis over standard check (He) were estimated to evaluate forty hybrids for seed yield and yield contributing characters. The average heterosis for seed yield of forty hybrids over mid parent was 3.27% and that of better parent and standard check was -9.72% and 5.60% respectively.Item PLANT-BIODIVERSITY AT AJMIRIGANJ HAOR HOMESTEADS OF BANGLADESH(DEPARTMENT OF GENETICS AND PLANT BREEDING, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA, BANGLADESH, 2012-07) HAQUE, MD. MAKSUDULThe purpose of the study was to determine the plant biodiversity and distribution of fruit, timber and vegetable species in the Haor homestead of Bangladesh and to explore the relationship between plant grower's characteristics and plant biodiversity. Ajmiriganj upazila of Hobigonj district of Bangladesh was the study area. The study covered 300 homesteads from five tinions. The information was collected by using questionnaires. focused group discussion and field observations. Plant biodiversity was described by Species richness, Relative prevalence and Species diversity. Twenty seven fruits. 23 timbers. 17 summer vegetables and 12 winter vegetables species were identified. None of the plant species was found in the 100% haor homestead. Coconut and mango were found in the highest number of homestead (79%) in the study area. The relative prevalence of most common fruit plant like betel nut, banana, mango were 115.074, 63.558, 74.358 respectively while the lowest relative prevalence was observed for very rare timber species like Indian Gum Tree, Champa and Jami. The highest species diversity was found in Mango (0,992), Coconut (0.990), Papaya (0.987) and that of lowest was found in fig. Ipil-ipil and Champa. Various kinds of problems were identified in the study area. According to the farmer's opinion, "Lack of improved plant species" was identified as the topmost problem. No relationship was observed between age of the farmers and fruit diversity, while education, family size, area of homestead, area under fruit have low and non-significant positive relationship with the plant diversity. There was no significant correlation between the demographic characteristics of the homesteads plant grower and plant Biodiversity.Item IN VITRO SCREENING OF TOMATO (Solanum lycopersicum L.) GENOTYPES FOR DROUGHT TOLERANCE USING POLAYETHELENIE GLYCOL(DEPARTMENT OF GENETICS AND PLANT BREEDING, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA, BANGLADESH, 2012-07) ROY, MALLIKA RANIThe experiment was conducted to study genetic diversity analysis of tomato (Solanum lycopersicu,n L.) under drought condition in vitro. Fourteen tomato genotypes were used as experimental materials among which I3ARI Tomato 2, BAR! Tomato -II are parent material and rest of all were lines, and they were I3ARI Tomato-2, BAR! Tomato-Il, 130-7260, l3!)-7290, BD-7295. 13l)-7286, BD- 7269, 130-7258, BD-7299, 13l)-7292. BD-7291, 13l)-7302, 13D-7301 and BD-7762. Murashige and Skoog medium were used with different PEG concentration as culture medium for root and shoot regeneration. The longest length of root (2.83 cm) was recorded for 0 g PEG, whereas the shortest length (1.88 cm) was observed in 60 g PEG. In an average, among the different genotypes of tomato the highest length of root (5.01 cm) was recorded from BARI-2 and the lowest length of root (0.69 cm) in BAR!- 1. Among the studied genotypes BARI-2, Bl)-7258, BD-7301 and BD-7762 produced the highest plant weight in 40 and 60 g PEG compared to 0 and 20 g PEG. In an average among the different genotypes of tomato the highest weight of plant (0.068 g) was recorded from BARI-2 and 13D-7290 and the lowest weight of plant (0.003 g) was found in I3ARI-1 I and BARI-7292. Cluster I and IV was the largest cluster comprising of 5 genotypes followed by cluster II with 3 genotypes and cluster III belongs only I genotypes of tomato. In considering of clustering mean for initial length the highest mean was 1.49 for cluster IV. In ease of length highest cluster mean 6.53 was recorded in cluster Ill and 11w plant weight highest cluster 0.066 was observed in cluster Ill. The rcsults revealed that genotypes chosen for hybridization from clusters with highest distances would give high heterotie F1 and broad spectrum of variability in segregating generations.Item HETEROSIS AND COMBINING ABILITY FROM 7X7 DIALLEL ANALYSIS IN Brassica napus L.(DEPARTMENT OF GENETICS AND PLANT BREEDING, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA, BANGLADESH, 2012-12) SULTANA, FARZANAAn experiment on oleiferous Brassica napus L. was conducted to evaluate the heterosis and combining ability for ten different characters. Out of 21 of F1 s, the hybrids Nap2022 x Nap2001 and Nap2022 x Nap248 showed desirable negative heterosis for the characters of shorter plant height, early flowering and early maturity. The hybrid Nap248 x Nap2012 was the best for early flowering. The cross Nap248 Nap 179 was the best for number of primary branches/plant. The hybrid Nap20 13 x Nap94006 was found to be the high heterotic for number of secondary branches and number of siliquae/plant. The cross Nap200l x Nap94006 was the best for siliqua length and number of seeds/siliqua, respectively. For 1000 seed weight the hybrids NapI 79 x Nap200 I and Nap2012 x Nap94006 and for seed yield/plant the crosses Nap2012 x Nap94006 was found to be the best heterotic. The parent Nap-248 was the best general combiner for early flowering, early maturity, plant height. The parent Nap-2012 was the best for 1000 seed weight. For seed yield the parent Nap-179 and Nap-94006 and for number of siliquae/plant the parent. Nap-2022 was suitable general combiner.The parent Nap-94006 is best for high no of primary branches and no of secondary branches. On the basis of average score and rank position, the hybrid Nap2022 x Nap2001 was the best specific combiner for early flowering. The combination Nap200I x Nap94006 was the best specific combiner for number of secondary branches/plant. The cross Nap2022 x Nap94006 and Nap179 x Nap94006 were the best for the number of primary branches and number of siliquae/plant respectively. For siliqua length NapI 79 x Nap94006 was the best specific combiner. The cross Nap20 13 x Nap200 I was the best specific combiner for seed yield/plant and 1000 seed weight. The mean sum of square due to GCA was significant for all traits indicating that the additive gene actions were predominant for the expression of these characters. The significant mean sum of square due to SCA was also observed for all the traits indicating that the non additive gene actions were predominant. The higher magnitude of SCA variance was observed than that of CiCA variance for plant height, days to maturity, number of primary branches, number of secondary branches, number of seeds/siliqua, seed yield/plant and 1000 seed weight.