Browsing by Author "Rahman, Jamilur"

Now showing 1 - 8 of 8

BREEDING EFFORTS FOR DEVELOPMENT OF CANOLA GRADE MUST ARD VARIETY IN FIELD MUSTARD tBrassica rapa)
(Sher-e-Bangla Agricultural University Research System, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh, 2022) Rahman, Jamilur; Rahman, Jamilur
Abstract Brassica rapa in the main oilseed crop in Bangladesh and development of canola grade B. rapa variety is a priority research in Bangladesh. The present research was under taken with a long term goal to develop canola grade B. rapa variety in Bangladesh. Six Canadian canola grade double zero genotypes of B. rapa were crossed with four Bangladeshi popular varieties e.g. Tori-7, Maghi, BARI Sharisa 14 and BARI Sharisa 17 to develop 24 F, hybrid populations. For transferring the low erucic trait from Canadian lines to Bangladeshi cultivars, backcrosses were also performed. The F, hybrids were evaluated for their saturated and unsaturated fatty acid compositions and yield contributing traits. The analysis of variance showed highly significant variation among the F, and BC,F I populations. Among the 24 hybrids, the lines Gl, G7, G14, G14, G16, G17, G18 and G19 were selected as promising lines as these lines had higher values of the yield and yield contributing traits. These F I lines were selected and advanced to F2 generation through self-fertilization and were also used in backcross breeding to develop BC 1F I. Among the hybrids, the desired negative heterosis effects for early maturity (90-95 days) were found in the hybrids G4, G5, G6, G7, G13 and G17, while the hybrids G 17, G 18, G 19, G20 showed the highest significant heterosis for yield, and the hybrids G 17 and G18 had the highest harvest index. The results suggested elite recombinant lines of early maturity and high yielding could possible be obtained from the segregants of these hybrid lines. The fatty acid compositions analysis unraveled that the hybrids viz. G3, G4, G5, G9, G12, 017, 020 and G23 had lower erucic acid «20-22%), but higher oleic (32-34%) and higher linoleic acid (22-24%), linolenic acid (9-11 %) contents suggested that these lines could possible produce low erucic acid plus high oleic linoleic, and linolenic acids in the segregating generations. Interestingly, some intercrossed F2 lines were found having low erucic acid «2%), but higher oleic acid (>50%) with early maturity (90-94 day) suggesting the breeding lines were very promising. Thus, the selected promising breeding lines could be utilized for developing early matured and high yielding having low erucic acid and high mono- and polyunsaturated fatty acid compositions. Keywords: short duration, canola-grade, breeding lines, high oleic acid, Brassica rapa
COLLECTION AND SCREENING FOR SALINITY STRESS TOLERANT RICE GENOTYPES USING COMBINATION OF MORPHOPHYSIOLOGICAL AND MOLECULAR MARKER
(Sher-e-Bangia Agricultural University Research System (SAURES), 2011-12) Rahman, Jamilur
Comparison of phenolics, flavonoids and anthocyanin in pigmented and non-pigmented maize in bangladesh
(Bangladesh Journal of Botany, 2024-09) Preety, Israt Jahan; Islam, Ariful; Rahman, Jamilur; Hossain, Ashrafi; Ahmed, Kamal Uddin
In the present study the compositions of phenolics, flavonoids and anthocyanins in a purple maize (SAU Bhutta 3) variety were determined and compared its phytonutrients with those of other maize varieties cultivated in Bangladesh. The SAU purple maize contained 106.0 ± 8.3 and 165.1 ± 8.0 mg /100 g of methanol soluble and acidic methanol soluble polyphenols, respectively. The SAU Bhutta 3 had the greatest amount of flavonoids (77.0 ± 10.0 mg /100 g) and anthocyanins (69.0 ± 5.0 C3G equv./100 g). Nevertheless, the SAU white maize variety had 31.0 ± 2.0, 47.0 ± 4.4 mg FAE/100 g and 9.0 ± 2.0 mg CE/100 g of free and bound phenolics and total flavonoids, respectively, which were lower than those of the SAU Bhutta 3. Again, the SAU red maize contained the lowest level of total anthocyanin (4.11 ± 1.2 mg C3G/100 g). The SAU Bhutta 3 exhibited higher proportions of insoluble phenolics compared to total phenolics and flavonoids compared to insoluble phenolics. Overall, the SAU Bhutta 3 contained relatively high amounts of phenolics, flavonoids and anthocyanins; thus, this particular maize variety shows significant potential for future utilization. Bangladesh J. Bot. 53(3): 495-502, 2024 (September)
DEVELOPMENT OF CANOLA GRADE INDIAN MUSTARD (Brassica juncea) VARlETY TO MEET THE EDIBLE OIL SECURITY AND CLIMATE CHANGE CHALLENGES IN BANGLADESH
(Sher-e-Bangia Agricultural University Research System (SAURES), 2022) Rahman, Jamilur
Abstract Erucic acid >2% in mustard oil is considered as unhealthy as edible oil and antinutritional for human consumption. The existing all mustard varieties of Bangladesh contain 40-48% erucic acid, which is a big concern for food and nutritional security and safety of the country. Hence, to develop canola grade mustard variety, six Bangladeshi Brassica juncea mustard variety were crossed with a canola grade double zero B. juncea line in 7x7 half diallel fashion. The developed 21 F] hybrids along with their parents were evaluated for yield contributing traits and fatty acid compassions. High narrow sense heritability was observed in days to pod maturity, while plant height, days to first flowering and seeds per siliquae showed moderate narrow sense heritability. The parental lines, PI, P3 and P4 were found as the best general combiner for earliness and dwarfness and, P2 and P7 showed the best combiner for yield contributing traits. Whereas, the hybrid lines, G3, G11 and G 13 indicated the best specific combiners for yield attributes, and the crosses, G6, G17 and G21 found for early maturity. The hybrid G3, G5 and G17 manifested the highest heterosis for early maturity over the check variety BARI sharisha 11. In the fatty acid compositions analysis, the crosses G19-54, G5-S 1 and G21-S I contained low erucic acid. In hybrids, total saturated fatty acid and mono-unsaturated fatty acid was ranged from 10.81% to 16.53% and 40.60% to 59.18%, respectively. The highest ratio of oleic acid (0)-9) to linoleic (0)-6) acid was found in P6, G5-S 1 and G 19-54. Moreover, P6, G19-54 and G19-52 showed the highest ratio of linoleic (CD-6)to linolenic (CD3) acid. The selected F] hybrid lines were further backcrossed to the selected Bangladeshi parents to reduce the growth duration and the seven types of BC] F] and BC2F] lines were developed. Altogether, the hybrids viz., G4, G5, G7, Gl1, G17, G19, G21 and lines ofBC]F" BC]F2and BC2F] could be utilized to develop early matured, high yielding low erucic acid containing improved mustard variety. Key words: low erucic acid, canola-grade, saturated and unsaturated fatty acid, breeding lines, climate change, Brassica juncea
DEVELOPMENT OF LOW ERUCIC ACID MUSTARD (Brassica rapa L.) ELITE AND PROMISING LINES THROUGH DIALLEL CROSSING AMONG SELECTED MUSTARD VARIETIES IN BANGLADESH
(Sher-e-Bangia Agricultural University Research System (SAURES), 2019) Rahman, Jamilur
GENETIC EVOLUATION OF PHYTOHAEMAGGLUTIN (PHA) I DIFFERENT GENOTYPES OF KIDNEY BEAN (Phaseolus vulgaris L.) FOR FURTHER IMPROVEMENT OF THE CROP
(Sher-e-Bangia Agricultural University Research System (SAURES), 2017) Rahman, Jamilur
MOLECULAR FARMING USING A GEMINIVIRAL RNAI-SUPPRESSOR PROTEIN, MYMIV-AC2 AND ITS SUPPRESSION MECHANISM IN RANI PATHWAY
(Sher-e-Bangia Agricultural University Research System (SAURES), 2011-12) Rahman, Jamilur
Optical fiber for terahertz wave
(IUT, EEE, 2016-11-20) Rahman, Jamilur; Rafi, Md. Abdur; Uddin, Md. Ashfaq
Terahertz radiation occupies a middle ground between microwaves and infrared light waves known as the terahertz gap, where technology for its generation and manipulation is in its infancy. The frequency band of 0.1-10 THz, known as THz band has brought potential applications in many important fields. For wave propagation THz systems use free space as medium. But in free space waves face many difficulties which is very big issue for wave propagation. So we have to use guided transmission instead of unguided transmission. In the mean time many guided transmission line has many kinds of deprivation such as effective material loss, confinement loss, bending loss, dispersion loss, power fraction issue etc. So we had decided to make a porous core fiber which has less losses than other PCF. Mainly we have been inspired from previous papers in which these losses was too much high for THz wave guidance. Then we have designed rotate hexagonal core and decagonal cladding with 8% PML of total fiber radius. This design gives a lower effective material loss and comparatively higher mode power propagation as well as a flattened dispersion gained over the frequency range 0.95-1.25 THz.