Complete sterility studies in three mutants of cowpea (Vigna Uunguiculata (l.) Walp
1999
Adu-Dapaah, H.K., Crops Research Institute, Councillor Scientific and Industrial Research, P.D. Box 3785. Kumasi, Ghana | Singh, B.B., International Institute olTropicalAgriculture (IITA), OyoRoad, P.MB. 53, Ibadan, Nigeria | Fatokun, C.A., International Institute olTropicalAgriculture (IITA), OyoRoad, P.MB. 53, Ibadan, Nigeria
Three completely-sterile cowpea mutants IT85D-3625, IT85D-3628, IT85D-3641 obtained from spontaneous mutation and gamma irradiation were-characterized. Reciprocal crosses between them and fertile plants failed to set pods. These lines showed significant differences with respect to various traits such as number of pollen grain per anther, anther length and width, plant height,anther indehiscence,unopened flower buds, and premature abortion of pods and seeds. The major cause of sterility was chromosome aberrations. Complete sterility in each of the three lines was conditioned by a simple recessive gene pair. Sterility in each of the three mutants was associated with floral aberrations. The symbols cs., cS1 and cS3 are being assigned to IT85D-3625, IT85D-2628 and IT85D-3641 respectively. The three mutants were homogeneous with reference to sterility inheritance.
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