Genetic Analysis of Tropical Midaltitude- Adapted Maize Populations under Stress and Nonstress Conditions.

ABSTRACT: Maize (Zea mays L.) yield in sub-Saharan Africa (SSA) is low because of both abiotic and biotic constraints, and limited availability or use of improved seed in some areas. This study was conducted (i) to estimate combining ability and heterosis among seven stress-tolerant populations, and (ii) to assess diversity among the populations and the relationship between diversity and heterosis. Twenty-one hybrids developed from diallel crosses of seven populations, parents, and two checks were evaluated in 10 optimal and 11 stressed environments (drought, low N, and random stress) in Kenya, Ethiopia, Uganda, and Zimbabwe for 2 yr. Analysis II of Gardner and Eberhart showed that variety and heterosis were significant for grain yield (GY) under optimal and managed stress, and across environ

SUBMITTER: Makumbi D 

PROVIDER: S-EPMC7680935 | biostudies-literature | 2018 Jul-Aug

REPOSITORIES: biostudies-literature