title: Eleven years of breeding efforts to combat cassava brown streak disease.
abstract: Cassava (Manihot esculentaCrantz) 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 S1families 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.
authors: National Crops Resources Research Institute , 9 km Gayaza-Zirobwe Road, P.O. Box 7084, Kampala , Uganda.
authors: Robert Sezi
authors: RS
authors: Kawuki
authors: National Crops Resources Research Institute , 9 km Gayaza-Zirobwe Road, P.O. Box 7084, Kampala , Uganda.
authors: Tadeo
authors: T
authors: Kaweesi
authors: National Crops Resources Research Institute , 9 km Gayaza-Zirobwe Road, P.O. Box 7084, Kampala , Uganda.
authors: Williams
authors: W
authors: Esuma
authors: National Crops Resources Research Institute , 9 km Gayaza-Zirobwe Road, P.O. Box 7084, Kampala , Uganda.
authors: Anthony
authors: A
authors: Pariyo
authors: National Crops Resources Research Institute , 9 km Gayaza-Zirobwe Road, P.O. Box 7084, Kampala , Uganda.
authors: Ismail Siraj
authors: IS
authors: Kayondo
authors: National Crops Resources Research Institute , 9 km Gayaza-Zirobwe Road, P.O. Box 7084, Kampala , Uganda.
authors: Alfred
authors: A
authors: Ozimati
authors: National Crops Resources Research Institute , 9 km Gayaza-Zirobwe Road, P.O. Box 7084, Kampala , Uganda.
authors: Vincent
authors: V
authors: Kyaligonza
authors: National Crops Resources Research Institute , 9 km Gayaza-Zirobwe Road, P.O. Box 7084, Kampala , Uganda.
authors: Alex
authors: A
authors: Abaca
authors: National Crops Resources Research Institute , 9 km Gayaza-Zirobwe Road, P.O. Box 7084, Kampala , Uganda.
authors: Joseph
authors: J
authors: Orone
authors: National Crops Resources Research Institute , 9 km Gayaza-Zirobwe Road, P.O. Box 7084, Kampala , Uganda.
authors: Robooni
authors: R
authors: Tumuhimbise
authors: National Crops Resources Research Institute , 9 km Gayaza-Zirobwe Road, P.O. Box 7084, Kampala , Uganda.
authors: Ephraim
authors: E
authors: Nuwamanya
authors: National Crops Resources Research Institute , 9 km Gayaza-Zirobwe Road, P.O. Box 7084, Kampala , Uganda.
authors: Philip
authors: P
authors: Abidrabo
authors: National Crops Resources Research Institute , 9 km Gayaza-Zirobwe Road, P.O. Box 7084, Kampala , Uganda.
authors: Teddy
authors: T
authors: Amuge
authors: National Crops Resources Research Institute , 9 km Gayaza-Zirobwe Road, P.O. Box 7084, Kampala , Uganda.
authors: Emmanuel
authors: E
authors: Ogwok
authors: National Crops Resources Research Institute , 9 km Gayaza-Zirobwe Road, P.O. Box 7084, Kampala , Uganda.
authors: Geoffrey
authors: G
authors: Okao
authors: National Crops Resources Research Institute , 9 km Gayaza-Zirobwe Road, P.O. Box 7084, Kampala , Uganda.
authors: Henry
authors: H
authors: Wagaba
authors: National Crops Resources Research Institute , 9 km Gayaza-Zirobwe Road, P.O. Box 7084, Kampala , Uganda.
authors: Gerald
authors: G
authors: Adiga
authors: National Crops Resources Research Institute , 9 km Gayaza-Zirobwe Road, P.O. Box 7084, Kampala , Uganda.
authors: Titus
authors: T
authors: Alicai
authors: National Crops Resources Research Institute , 9 km Gayaza-Zirobwe Road, P.O. Box 7084, Kampala , Uganda.
authors: Christopher
authors: C
authors: Omongo
authors: National Crops Resources Research Institute , 9 km Gayaza-Zirobwe Road, P.O. Box 7084, Kampala , Uganda.
authors: Anton
authors: A
authors: Bua
authors: International Institute of Tropical Agriculture (IITA), C/o International Livestock Research Institute (ILRI) , P.O. Box 30709, Nairobi 00100 , Kenya.
authors: Morag
authors: M
authors: Ferguson
authors: International Institute of Tropical Agriculture (IITA) , P.O. Box 34441, Dar es Salaam , Tanzania.
authors: Edward
authors: E
authors: Kanju
authors: National Crops Resources Research Institute , 9 km Gayaza-Zirobwe Road, P.O. Box 7084, Kampala , Uganda.
authors: Yona
authors: Y
authors: Baguma
keywords: BLUPs; CBSD genetics; incidence; resistance genes; root necrosis; severity