Genetic inheritance of resistance to Fusarium redolens in cowpea
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Date
2017
Journal Title
Journal ISSN
Volume Title
Publisher
Journal of Plant Breeding and Crop Science
Abstract
Fusarium related root rots have been associated with reduced cowpea productivity in Uganda. Sources
of genetic resistance to Fusarium redolens which was found to be the most virulent have been
identified but the mode of inheritance of the genes conferring the resistance is unknown. This study
aims to investigate how the genes for resistance to F. redolens are inherited in cowpea. Four F.
redolens root rot resistant cowpea genotypes were crossed with four intermediately resistant and 2
susceptible cowpea genotypes using North Carolina mating design II. The F1 and the parents were
evaluated and data were collected on resistance to seed rot, leaf chlorophyll amount, produced lateral
roots, response to plant mortality and root rot severity. Results revealed that additive gene effects were
significant for all evaluated traits and non-additive genetic effects were significant in resistance to seed
rot and chlorophyll amount. General combining ability (GCA) effects showed that the Asontem
genotype was a good combiner for increased lateral roots production and resistance to root rot. Degree
of dominance estimates revealed that response to plant mortality, root rots and increased lateral root
production traits were recessively inherited while seed rot and amount of leaf chlorophyll were
dominantly inherited.
Description
Keywords
Vigna unguiculata, Baker’s ratio, Combining ability, Fusarium redolens, Heritability, Uganda
Citation
Wanjala, N. R., Tusiime, G., Martin, O., Gibson, P., Agbahoungba, S., Boris, A. M. E., & Edema, R. (2017). Genetic inheritance of resistance to Fusarium redolens in cowpea. Journal of Plant Breeding and Crop Science, 9(10), 165-174. DOI: 10.5897/JPBCS2017.0679