Eleven years of breeding efforts to combat cassava brown streak disease
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Date
2016
Journal Title
Journal ISSN
Volume Title
Publisher
Breeding Science
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.
Description
Keywords
BLUPs, CBSD genetics, Incidence, Resistance genes, Root necrosis, Severity
Citation
Kawuki, R. S., Kaweesi, T., Esuma, W., Pariyo, A., Kayondo, I. S., Ozimati, A., ... & Baguma, Y. (2016). Eleven years of breeding efforts to combat cassava brown streak disease. Breeding Science, 16005. doi:10.1270/jsbbs.16005