Heritability and gene effects for incorporating pubescence into cowpea (<Emphasis Type="Italic">Vigna unguiculata</Emphasis> (L) Walp.) from <Emphasis Type="Italic">V. rhomboidea</Emphasis> Burtt. Davy |
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Authors: | Bakari Aliyu |
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Institution: | (1) Department of Crop Production and Horticulture, Federal University of Technology, P.M.B. 2076, Yola, Adamawa State, Nigeria |
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Abstract: | Cowpea, an important subsistence pulse crop in the tropics and subtropics is susceptible to several insect pests that seriously
limit its yield potential. Pubescence (hairiness) on the parts of some of its wild relatives has been reported to reduce the
damage caused by some of the insect pests. A generation mean analysis was conducted between a cowpea variety IT82D-716 and
two accessions of Vigna
rhomboidea to investigate the gene effects and heritability for incorporating pubescence into cultivated cowpea from V.
rhomboidea. The additive-dominance model that was adopted in the analysis was observed to sufficiently explain the mode of inheritance
of leaf and stem pubescence with the additive effect being more important than the dominance effect. A six-parameter model
with epistatic gene interactions was adequate for explaining the inheritance of pod pubescence. Heritability estimates, in
the narrow sense were high for pubescence density and pubescence length. Inheritance of pubescence in crosses between cowpea
and V.
rhomboidea was governed by one and two genes. Significant and higher additive gene effects and high-heritability suggest that backcross
selection schemes should be responsive in the development of pubescent cowpea lines. |
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Keywords: | Wild Vigna Pubescence Resistance Genes Cowpea Insect pests |
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