Breeding Science
Online ISSN : 1347-3735
Print ISSN : 1344-7610
Research Papers
Eleven years of breeding efforts to combat cassava brown streak disease
Robert Sezi KawukiTadeo KaweesiWilliams EsumaAnthony PariyoIsmail Siraj KayondoAlfred OzimatiVincent KyaligonzaAlex AbacaJoseph OroneRobooni TumuhimbiseEphraim NuwamanyaPhilip AbidraboTeddy AmugeEmmanuel OgwokGeoffrey OkaoHenry WagabaGerald AdigaTitus AlicaiChristopher OmongoAnton BuaMorag FergusonEdward KanjuYona Baguma
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2016 Volume 66 Issue 4 Pages 560-571

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Abstract

Cassava (Manihot esculenta Crantz) production is currently under threat from cassava brown streak disease (CBSD), a disease that is among the seven most serious obstacles to world’s food security. Three issues are of significance for CBSD. Firstly, the virus associated with CBSD, has co-evolved with cassava outside its center of origin for at least 90 years. Secondly, that for the last 74 years, CBSD was only limited to the low lands. Thirdly, that most research has largely focused on CBSD epidemiology and virus diversity. Accordingly, this paper focuses on CBSD genetics and/or breeding and hence, presents empirical data generated in the past 11 years of cassava breeding in Uganda. Specifically, this paper provides: 1) empirical data on CBSD resistance screening efforts to identify sources of resistance and/or tolerance; 2) an update on CBSD resistance population development comprising of full-sibs, half-sibs and S1 families and their respective field performances; and 3) insights into chromosomal regions and genes involved in CBSD resistance based on genome wide association analysis. It is expected that this information will provide a foundation for harmonizing on-going CBSD breeding efforts and consequently, inform the future breeding interventions aimed at combating CBSD.

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© 2016 by JAPANESE SOCIETY OF BREEDING
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