Inheritance of resistance to aphid in cowpea

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dc.creatorBata, H.D.
dc.creatorSingh, B.
dc.creatorSingh, S.R.
dc.creatorLadeinde, T.A.O.
dc.date1987
dc.date2025-09-26T10:46:10Z
dc.date2025-09-26T10:46:10Z
dc.date.accessioned2026-06-27T16:00:56Z
dc.descriptionAphid (Aphis craccivora Koch) is a major pest of cowpea [Vigna unguiculata (L.) Walp.] particularly in the drier regions of the tropics. It causes direct damage by feeding on the plants and also transmits viruses. Several sources of resistance to cowpea aphid have been identified and efforts are underway to develop aphid-resistant cultivars of cowpea. This study was undertaken to elucidate the inheritance of resistance to aphid in cowpea. Three resistant lines were used in the study. Parental, F1, F2, F3, and backcross populations involving resistant ✕ susceptible and resistant ✕ resistant lines were evaluated in the greenhouse using artificial infestation with aphids. The F1 plants in all the crosses were resistant and the F2 populations derived from all the crosses involving resistant and susceptible parents segregated into 3 resistant:1 susceptible ratio. The backcross populations involving susceptible parents segregated into 1 resistant:1 susceptible ratio, whereas the backcross populations involving resistant parents were completely resistant. The F3 progenies derived from resistant F2 plants showed a ratio of 1/3 true breeding resistant:2/3 segregating like F2's. These data indicated monogenic dominant inheritance of aphid resistance. The gene symbol Rac (resistance to Aphis craccivora) is being assigned for this trait.
dc.formatapplication/pdf
dc.identifierhttps://hdl.handle.net/10568/176694
dc.identifier.urihttp://hdl.handle.net/123456789/120083
dc.languageen
dc.publisherWiley
dc.rightsLimited Access
dc.sourceBata, H.D., Singh, B.B., Singh, S.R., & Ladeinde, T.A.O. (1987). Inheritance of resistance to aphid in Cowpea . Crop science, 27(5), 892-894.
dc.subjectcowpeas
dc.subjectinheritance
dc.subjectbackcrossing
dc.subjectaphids
dc.titleInheritance of resistance to aphid in cowpea
dc.typeJournal Article

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Instituto Internacional de Agricultura Tropical (IITA)