• B G S Rao

      Articles written in Proceedings – Plant Sciences

    • Chromosome relationships of spinous solanums

      P B Kirti B G S Rao

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      Chromosome pairing was studied in reciprocal hybrids ofS. integrifolium andS. indicum and theF1S. integrifolium × S. surattense. Pairing was generally close and meiosis regular with higher chromosome associations. All hybrids were highly sterile. Such sterility could be due to the formation of unbalanced gametes following pairing and exchange between partially homeologous chromosomes.S. integrifolium, S. indicum, S. surattense along withS. melongena and its wild forms form a closely related group of taxa.

    • Clastogenic and turbagenic effects of organophosphorus pesticides onAllium cepa root meristems

      B V Rao C B S R Sharma B G S Rao

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      Cytological effects of different concentrations of 3 organophosphorus insecticides viz malathion, parathion-methyl and quinalphos were studied onAllium cepa L. root meristems. Root meristems were exposed to the test solutions for 1 h followed by different recovery periods (0, 4, 12, 24 and 48 h) in Hoagland’s nutrient solution. Among the 3 insecticides tested, parathion-methyl is found to be the most effective clastogenic as well as turbagenic agent. Malathion induced wide range of clastogenic effects whereas quinalphos is shown to be weak clasto- and turbagenic agent.

    • Cytomorphological studies of the hybrids betweenSolanum pubescens, solanum incanum andSolanum indicum

      Y V Rao B G S Rao

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      Reciprocal hybrids were obtained betweenSolanum pubescens (non-spinous taxon) andSolanum incanum andSolanum indicum (spinous taxa) through modified hand pollination technique. The aspects studied relate to the cytomorphology of the F1 and F2 hybrids. On the basis of these studies it is concluded thatSolanum pubescens, Solanum incanum andSolanum indicum are cross compatible and have considerable homologies among them. The F1 hybrids were partially pollen sterile.

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