Agronomic performance of drought-tolerant maize hybrids in diverse environments of lowland tropics uri icon

abstract

  • Assessment of maize (Zea mays L.) hybrids for adaptation to diverse environments is crucial for sustainability of maize production and productivity in sub-Saharan Africa. A total of 110 hybrids derived from 10 elite drought-tolerant maize inbreds and 11 checks were evaluated at three locations for 2 years in Nigeria to identify high-yielding and stable hybrids using different stability approaches. Mean squares were significant for genotypes (G), environments (E) and genotype x environment interaction (GEI) for grain yield and most other traits. The test environments contributed 83.7% to the total variation in grain yield, whereas G accounted for 5.0% and GEI 11.3%. The repeatability of traits ranged from 0.22 to 0.66. Grain yield of hybrids ranged from 2.1 t ha(-1) for TZEI 17 x TZEI 16 to 4.1 t ha(-1) for TZEI 129 x TZEI 16, with mean yield of 3.1 t ha(-1). The results of additive main effect and multiplicative interaction (AMMI) analysis and rank summation index were found to be consistent, as both methods identified TZEI 129 x TZEI 16 and (TZEI 17 x TZEI 16) x TZEI 157 as high-yielding and consistent-performing across test environments. The outstanding hybrids should be further tested on-farm to facilitate the registration and commercialization in Nigeria.

publication date

  • 2017
  • 2017