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Articles by S.D. Ahmad
Total Records ( 3 ) for S.D. Ahmad
  S.D. Ahmad and I. Khaliq
  Ocimum sanctum has immense medicinal value against malaria, gastric diseases, blood and heart diseases, cough, bronchitis, asthma, chronic fever, liver disorder, earache, ringworm and skin diseases. In order to evaluate the genetic diversity among different genotypes of Ocimum for the development of better varieties, plant characteristics including phenotypic and genotypic variation as well as biochemical analysis were conducted. The seeds of four genotypes, collected from different localities of District Poonch, Azad Kashmir were sown in pots and transplanted to the field. The morphological studies based on leaf area, number of racemes/plant, number of flowers/raceme, plant height, 1000-seeds weight and days to maturity indicated large diversity among genotypes. Total seed proteins in SDS-PAGE also produced diverse banding pattern among the genotypes compared. Due to the larger genetic diversity in germplasm of Ocimum sanctum and its suitability for commercial cultivation in the area under small land holdings, the investigation suggests it`s genetic as well as biochemical investigation on larger scale for the production of commercial varieties and exploitation of the plant for economic benefits of the local communities.
  L. Hassan and S.D. Ahmad
  Colchicine at various concentration was given to the apical buds of maize (Zea mays L.) Plants, in order to induce tetraploidy for meiotic studies. Highly irregular meiosis in the C1 generation was revealed. These meiotic abnormalities increased pollen sterility which lead to a lower seed setting. In the C2 generation the occurrence of bivalents has increased and that of multivalents has decreased. Restoration of meiotic regularities, pollen fertility.
  L. Hassan and S.D. Ahmad
  The effect of chemical mutagens on the induction of mitotic chromosomal aberrations in diploid Allium cepa and tetraploid Allium vineale has been studied. In inducing chromosomal aberrations in case of both diploid and tetraploid Allium all the mutagens were found to be effective . Mitotic irregularities were higher in tetraploid species as compared with the diploid species. All types of chemical mutagens were found to be effective for the induction of chromosomal aberrations but chromosomal aberrations are increased due to the effect of Ethyl Methyl Sulphonate (EMS) in comparison to the other chemical mutagens. In explaining the concentration of EMS application of 0.20 % of the chemical may be the highest dose whereas 0.05 % may be considered as a lower dose.
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