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Inheritance of resistance to Fusarium oxysporum f. sp. cubense race 1 in bananas

Author:
Ssali, Reuben Tendo, Kiggundu, Andrew, Lorenzen, Jim, Karamura, Eldad, Tushemereirwe, Wilberforce, Viljoen, Altus
Source:
Euphytica 2013 v.194 no.3 pp. 425-430
ISSN:
0014-2336
Subject:
Fusarium oxysporum f. sp. cubense, Fusarium wilt, Musa, bananas, crop production, fungi, genetic resistance, recessive genes, wilting
Abstract:
Fusarium wilt of bananas (also known as Panama disease), caused by the soil-borne fungus Fusarium oxysporum f. sp cubense (Foc), is a serious problem to banana production worldwide. Genetic resistance offers the most promising means to the control of Fusarium wilt of bananas. In this study, the inheritance of resistance in Musa to Foc race 1 was investigated in three F-2 populations derived from a cross between 'Sukali Ndizi' and 'TMB2X8075-7'. A total of 163 F-2 progenies were evaluated for their response to Fusarium wilt in a screen house experiment. One hundred and fifteen progenies were susceptible and 48 were resistant. Mendelian segregation analysis for susceptible versus resistant progenies fits the segregation ratio of 3:1 (chi(2) = 1.72, P = 0.81), suggesting that resistance to Fusarium wilt in Musa is conditioned by a single recessive gene. We propose panama disease 1 to be the name of the recessive gene conditioning resistance to Fusarium wilt in the diploid banana 'TMB2X8075-7'.
Agid:
612488