Genetic variability and heritability among durum wheat (Triticum turgidum L.) accessions for yield and yield related traits performance

Abstract

Durum wheat is the second most important Triticum species next to bread wheat. Ethiopia is one of the centers of diversity for durum wheat. The aim of this study was to assess variability, heritability and genetic advance for some yield and yield-related traits. A total of 97 durum wheat accessions along with 3 improved varieties were evaluated in 10 x 10 simple lattice designs during the 2018 main cropping season at Mata Subsite of Haro Sabu Agricultural Research Center. Twenty parameters were collected and analyzed. Statistically significant (p≤0.01) variation was observed among materials tested for important quantitative and qualitative traits. Genotypic coefficient of variation (GCV) ranged from 3.77 to 44.81% for days to maturity and grain yield (tons ha-1), respectively. Broad sense heritability ranged from 72.33 to 99.95% for plant height and number of kernels per spike, respectively. The highest genetic advance as percent of mean recorded for grain yield (88.80%) and the least for moisture (5.22%). Generally, the magnitude of genetic variability among the studied durum wheat accessions showed great variations for desirable traits and thus confident enough to expect genetic progress if further breeding activities are carried out. Key words: Coefficient of variation, durum wheat (Triticum turgidum L.), genetic advance, heritability.