LOSS IN SEED COTTON YIELD DUE TO FUSARIUM WILT IN SUDAN GEZIRA
Mar 10, 2017

Breeding & Genetic improvement WCRC Breeding-MedMiddleEast WCRC1
Abstract                                                                         Back to Table of contents

Loss in seed cotton (Gossypium barbadense L.) yield, resulting from Fusarium vascular wilt disease (Fusarium oxysporum Schlecht f. sp. vasinfectum (Atk.) Snyd. and Hans), was assessed for three consecutive seasons, on nine cultivars of different disease resistance and yield potential.  The resistant cultivars outyielded the susceptible ones under high disease pressure.  In all three seasons yields of the resistant cultivars were significantly higher (P = .05) than that of the standard 'Barakat'.  Superiority in yield was clearly due to the low level of the disease.  Under no disease stress, yields of a resistant 'EBWR' and a susceptible 'B-Pima' cultivars, only, were significantly higher (P = .05) than that of 'Barakat'.  The yields of two other resistant cultivars 'EB(73))1-1' and 'GS(84)3', though higher than that of the standard, were lower than the susceptible, but higher yield potential cultivars, 'B-Pima' and 'OLB'.  Yields of two other resistant cultivars 'EB(73)3-3' and 'Maryoud' were even lower than the standard.  It is concluded that resistance to Fusarium wilt leads to stability in seed cotton yield, and cultivar EBWR should be useful in developing other Fusarium resistant and high yielding cultivars.

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