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Articles by R. Islam
Total Records ( 5 ) for R. Islam
  Ahsan Nagib , S.A. Hossain , M.F. Alam , M.M. Hossain , R. Islam and R.S. Sultana
  In order to produce virus free potato tuber seeds in vitro culture was established using apical meristem of four widely cultivated varieties of Bangladesh namely Diamant, Cardinal, Multa and Lalpakri. Meristem of these varieties of potato were cultured for shoot proliferation and root induction in MS and MS0 medium supplemented with different types and concentration of phytohormones. Among the different growth regulator formulations, 0.5 mg l-1 GA3+0.04 mg l-1 KIN was found to be the best medium for the primary establishment of meristem. The primary established meristems were subcultured on to MSo medium and MS medium containing BA and IBA singly or in combinations. Considering all the treatments singly use of IBA (0.5 mg l-1) is recommended for proper shoot and root development from primary meristem. After DAS-ELISSA test the virus free in vitro grown potato plantlets were using for massive micro propagation. GA3 and KIN singly or in combinations are used for shoot and root multiplication, among all these combinations 2.0 mg l-1 GA3 was found to be the best media for shoot induction for the studied varities. For high frequency of root formation, combination of GA3 (0.1 mg l-1)+KIN (0.1 mg l-1) was most effective. Rooted plantlet were gradually acclimatized and successfully established in the field. Visual evolution of the morphological trials of the tissue culture derived plants showed all plants were found normal and free from virus diseases. Substantial yield increase was observed in meristem derived plants over their source plants.
  Md. Abdullah Baki , Nadira Akhtar , M.M. Rahman , M.N. Islam , Mosharrof Hossain , N. Islam , M. Khursed Alam , R. Islam , N.A. Khatun and KAMSH Mondal
  Synergistic effect of W. calendulacea plant extract combined with Lamda cyhalothrin were demonstrated against red flour beetle T. castaneum in methanol extract. W. calendulacea plant extract offered synergistic action when used Lamda cyhalothrin. It was noted that plant extract indicates synergistic action from 1:1 to 1:5 ratio and above.
  Lipika Ghosh , M.S. Alam , M.R. Ali , A.M. Shohael , F. Alam and R. Islam
  The biochemical parameters such as moisture, ash, protein, fat, carbohydrate, Vitamin-C, phenol, pectin and mineral contents of healthy and leaf spot disease infected mulberry (Morus sp.) leaves were analyzed. Most of these nutrient contents in mulberry leaves were affected greatly with the infection of fungi. Total sugar, reducing sugar, non-reducing sugar, starch, moisture, ash, protein and lipid contents were found to be decreased in infected mulberry leaves due to leaf spot disease caused by Cercospora moricola Cooke and these contents were decreased by 8.58, 1.6, 60.09, 20.22, 24.52, 38.16, 33.84 and 40.26%, respectively. Among the contents, only Vitamin-C, phenol, pectin and mineral contents were found to be increased in infected samples over healthy samples and these contents were increased by 90, 84.21, 35 and 39.97%, respectively. The changes of total sugar, reducing sugar, non-reducing sugar, starch, protein, ash and lipid contents decreased remarkably but those of Vitamin-C, phenol, pectin and mineral contents increased significantly in leaves of disease affected mulberry as compared to those in healthy mulberry.
  N. Khatun , M.A. Bari , R. Islam , S. Huda , N.A.Siddique , M.H. Rahman and M.U. Mollah
  The nodal segments of Diamant cultivar of potato from in vitro grown plantlets were cultured for callus induction and regeneration on MS semisolid medium supplemented with different concentrations of 2,4-D, NAA, BAP alone and NAA with BAP. Highest 90.00% of callus formation was observed in MS+2.5 mgl G 12,4-D. The second highest 83.33% callus induction was recorded in MS+5.0 mgl G 1 BAP. Maximum percentages (70.00%) of calli-induced shoots were observed in MS medium fortified with 5.0 mgl G 1 BAP+0.1 mgl G 1IBA. The regenerated shoots were rooted on MS and 2 MS medium containing different concentrations of IBA and maximum rooting response was achieved in 2 MS +1.0 mgl G 1IBA. Regenerated plants were successfully established in soil after acclimatization.
  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.
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