Inheritance of Resistance To Brown Blotch, Septoria Leaf Spot and Scab in Cowpea (Vigna Unguiculata (L.)Walp.)

Inheritance of resistance of brown blotch, scab, and Septoria leaf spot was studied in crosses of cowpeas involving resistant and susceptible parents. The observations on F1, f2 and backcross populations of different crosses indicated that resistance to brown blotch is controlled by a single recessive gene pair, resistance to Septoria is controlled by duplicate dominant genes and the resistance to scab is controlled by a single recessive gene pair. Accordingly, the gene symbols rcc for resistance to Colletotrichum capsici (brown blotch); Rsv 1 and Rsv 2 for resistance to Septoria vignae (Septoria leaf spot) and rss for resistance to Sphaceloma sp. (Scab).are being assigned.