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Articles by A.M.S. Alam
Total Records ( 2 ) for A.M.S. Alam
  A. Mondal , G. Kabir , G.P. Ghosh , N. Yasmin , A.M.S. Alam and H.A. Khatun
  Morphological variations among all the ten species of Ipomoea were observed both qualitative and quantitatively. Thirteen quantitative characters were taken into consideration and their mean values were compared statistically. Comparative analysis revealed variations from species to species. Qualitative characters concerned with root/tuber, stem/leaf, flower and capsule/seed were examined. Almost all the species of Ipomoea are of herbaceous and climbing habit except I. aquatica, it is amphibious in nature. Most of the species showed leaves to be lobed with various shape such as ovate-oblong, cordate, broadly ovate, ovate-cordate etc. except I. quamoclit where the leaves were found to be pinnately paired and cut up to the midrib. Flowers were observed to be few in axillary cymes in most of the species and in few species flowers were many in terminal cymes, except I. pes-tigridis where the flowers were head like involucrate in auxillary cymes. On the other hand, seed colours were also found to vary but slightly in the species of Ipomoea examined in the present investigation.
  M.M. Rahaman , G. Kabir , A.M.S. Alam , N. Yasmin , S. Akhter and M.M. Ud-Deen
  The present study was carried out for making a keen observation on interphase nuclei of F1s and their respective parents. Mean values for chromocentre number were found to be higher that of their respective Hordeum parents and but lower than that of their Triticum parents. The number of chromocentres were always less compared to their chromosome number in all the F1s. The percentage of heterochromatin per nuclear area in different hybrids ranged from 24.69% (H. nudum x T. durum) to 28.38% (T. aestivum x H.nudum). Nuclear Volume (NV) and Interphase Chromosome Volume (ICV) were found to be proportionally related the number and size of chromosomes. Mean values for Interphase Chromosome Volume (ICV) in the hybrids were found to decrease when compared to Triticum species but increased when compared to Hordeum species.
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