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Articles by M.K. Biswas
Total Records ( 3 ) for M.K. Biswas
  A. Hoque , A. Nahar , M.A. Razvy , M.K. Biswas and A.H. Kabir
  Three varieties of water chestnut (Trapa quadrispinosa, T. bispinosa and T. acornis) collected from Rajshahi, Naogaon, Natore have been used in this study. Embryonal explants were found to be best for callus induction on the medium containing half strength MS salts in combination of 2.5 mg L-1 2,4-D and 1 mg L-1 BA in all three varieties. For survival of explant 0.1% HgCl2 having 7 minutes of treatment period was found to be best. Addition of CH (2.0 mg L-1) and PG (2.0 mg L-1) proved to be effective to overcome the phenolic oxidant during callus induction. Callus derived plantlet formation was being a difficult task in water chestnut. Liquid half strength MS medium supplemented with 1.1 mg L-1 BA and 0.5 mg L-1 NAA has been proved to be best for shoot proliferation in all the varieties. Moreover, addition of 0.5 mg L-1 GA3 with aforesaid combination highly stimulated the axillary shoot elongation of Trapa sp. Rooting of produced shoot showed highest percentage in a liquid half strength MS medium containing 1.1 mg L-1 IBA. This in vitro plantlet were then transferred and acclimatized in plastic pots under favorable humidity and temperature. After 4 weeks of acclimatization callus derived plantlets were established successfully in a water chestnut field. It was found that all the plantlets were disease free and the survival rate was almost 95%.
  M.K. Biswas , M.A.A. Mondal , M.G. Ahmed , A. Hoque , M.M. Hossain and R. Islam
  Genetic variability and heterosis for eight quantitative traits were evaluated in seven parents and ten hybrids. The hybrids were derived from a 5x2 line x tester mating design. In general high component of variation and coefficient of variability were observed for most of the characters. The highest component of variation, coefficient of variability and heritability were noticed in PW, TW 60 and TN 60. Characters those with high genetic variability and genetic advance were considered to be important for selecting the desirable parents. Heterosis was worked out over mid parent, better parent and standard parent. Combinations AU/13, LP/13, PT/13 and LS/13 for PH; combination PT/13 and LP/13 for TN 60 were significant for mid parent, better parent and standard parent heterosis. The best heterotic combinations for TW 60 were LP/13, LS/13 and LSB/13 which recorded 990.28, 1115.28 and 648.61% standard heterosis respectively and can be utilized for hybrid development.
  M. Nuruzzaman , M. F. Alam , M. G. Ahmed , A.M. Shohael , M.K. Biswas , M.R. Amin and M.M. Hossain
  Genetic variability was studied for eight quantitative traits in fourteen parental lines of hybrid rice. The characters were plant height, flag leaf initiation day, first panicle initiation day, days to 100% flowering, days to maturity, grain yield/10 hills, spikelet fertility/10 panicles and no. of effective tillers/hill. Two additional characters (flag leaf length and spikelet length) were included in heterosis study. In general high component of variation and coefficient of variability were observed for most of the characters. The highest component of variation, coefficient of variability and heritability were noticed in grain yield/10 hills. Characters those with high genetic variability and genetic advance were considered to be important for selecting the desirable lines. Heterosis was studied in ten F1 lines for 10 characters. In general, the hybrids performed significantly better than the respective parents. Mid parent, standard variety and better parent heterosis were observed for all the characters under study. In comparison of F1 hybrids with their respective mid parent, standard variety and better parent showed significant heterosis for most of the studied characters. Among the 10 hybrids three lines viz., IR62829AxIR62036-222-3-3-1-2R, IR58025AxIR61614-38-19-3-2R and IR68888AxIR56381-139-2-2R exhibited the highest heterosis in grain yield/10 hills. In conclusion, there was an ample scope for developing suitable hybrid rice from the studied parental lines as the hybrids exhibited vigour and earliness.
 
 
 
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