Adjebeng-Danquah, J.

Alves, A.A.C.

Ferguson, Morag E.

Fregene, Martin A.

Kamau, J.

Maass, Brigitte L.

Mkamilo, G.S.

Mutegi, R.

Setter, Tim L.

Tiessen, H.

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Field evaluation of cassava varieties under drought stress in Kenya, Tanzania and GhanaMutegi, R1,2., Ferguson, M1., Maass, B.L2., Tiessen H2., Mkamilo, G3., Kamau, J4., Adjebeng-Danquah5, J., Alves, A6., Setter, T7., & Fregene, M8IntroductionCassava is a staple crop with remarkable tolerance to drought and great ability to survive uncertain rainfall patterns. Experiments are underway in Kenya, Tanzania and Ghana to identify the genetic and physiological traits that make cassava a particularly drought tolerant crop. The study also aims to identify molecular markers associated with drought tolerance genes for the application in breeding programs as well as identify cassava clones with outstanding drought tolerance.1International Institute of Tropical Agriculture, 2Goettingen University, Germany, 3Agriculture Research Institute (ARI) Tanzania, 4Kenya Agriculture Research Institute (KARI) Kenya, 5Savannah Agriculture Research Institute (SARI) Ghana, 6Brazilian Agricultural Research Corporation (EMBRAPA/CNPMF), 7Cornell University, 8International Center for Tropical Agriculture (CIAT). Receiving, hardening and rapid micro propagation  of in vitro mapping populations (MCOL 1734 x VEN 77; MCOL 1468 x BRA 255) and selfed progeny (MCOL 1734) developed by CIAT and EMBRAPA.Mapping populationsPhysiological characterization using 53 IITA and 9 local germplasm in a RCB design, 2 replicates, 2 treatment (irrigated and non-irrigated) in Kiboko, Kenya and Hombolo, TanzaniaClonal evaluation100% 75% 50% 25%We acknowledge the financial support provided by  GCP, BMZ and DAADwww.iita.orgMethodologies and progressGenotyping of mapping populationsMonomophic primer         Polymorphic primer MCOL 1734 X VEN 77   = 168 SSR MarkersMCOL 1468 X BRA 255 = 147 SSR MarkersPolymorphic markers? Soil moisture contentParameters? % Leaf  retention? Flowering? Length and width  of fully expanded leaf? ABA and starch content? Yield parameters? Stomata conductanceand leaf temperature

Field evaluation of cassava varieties under drought stress in Kenya, Tanzania and Ghana

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Field evaluation of cassava varieties under drought stress in Kenya, Tanzania and Ghana

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