Abstract
An investigation on inheritance of qualitative traits in dolichos bean revealed biallelic monogenic control of photoperiod-induced sensitivity to flowering time and flower colour in F 2 and F 3 generations. While, growth habit and pod curvature are each controlled by two genes that exhibit classical complementary epistasis, raceme emergence was controlled by two genes that displayed classical inhibitory epistasis. The dominant alleles, at two different unlinked pairs of genes are necessary for plants to exhibit indeterminate growth habit and bear straight pods. Any other combination of alleles at the two pairs of genes result in plants displaying determinate growth habit and bearing curved pods. While, the genes controlling growth habit, PSFT and raceme emergence are linked. Those controlling flower colour and pod curvature are segregated independent of each other. These results are discussed in relation to strategies for breeding dolichos bean.
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Senior author gratefully acknowledges Kirkhouse Trust, UK, for providing financial support in the form of fellowship for conducting thesis research for partial fulfilment for the award of Ph.D. degree by University of Agricultural Sciences, Bengaluru, India.
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[Keerthi C. M., Ramesh S., Byregowda M., Rao A. M., Rajendra Prasad B. S. and Vaijayanthi P. V. 2016 Further evidence for the genetic basis of qualitative traits and their linkage relationships in dolichos bean (Lablab purpureus L.). J. Genet. 95, xx–xx]
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KEERTHI, C.M., RAMESH, S., BYREGOWDA, M. et al. Further evidence for the genetic basis of qualitative traits and their linkage relationships in dolichos bean (Lablab purpureus L.). J Genet 95, 89–98 (2016). https://doi.org/10.1007/s12041-015-0610-1
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DOI: https://doi.org/10.1007/s12041-015-0610-1