Genetic studies of extra-early provitamin-A maize inbred lines and their hybrids in multiple environments.

ABSTRACT: Vitamin A deficiency, drought, low soil nitrogen (low-N), and Striga hermonthica parasitism of maize (Zea mays L.) cause malnutrition and food insecurity in sub-Saharan Africa. The objectives of this study were to determine combining abilities of extra-early provitamin A (PVA) lines, classify them into heterotic groups (HGs), identify testers, and determine yield stability of hybrids under contrasting environments in two trials. In Trial 1, 190 F1 hybrids plus six checks were tested under Striga-infested, drought, and stress-free environments in Nigeria from 2015-2017. In Trial 2, 35 extra-early yellow hybrids were evaluated under low-N, Striga-infested, and stress-free environments in 2018. TZEEIOR 202 and TZEEIOR 205 had PVA concentrations of 23.98 and 22.56 μg g-1. TZEEIOR 197 × TZEEIOR

SUBMITTER: Badu-Apraku B 

PROVIDER: S-EPMC7318638 | biostudies-literature | 2020 May-Jun

REPOSITORIES: biostudies-literature