Abstract

Evaluation of genetic variability in bread wheat (Triticum aestivum L.) genotypes at Holeta, Central Ethiopia

The experiment was conducted in in alpha-lattice design at Holeta Agricultural Research Center in the 2021 main cropping season with two replications at experimental area of research farm. Analysis of variance revealed that there were statistically significant differences among the genotypes for most of their traits. The varieties showed wider variability in grain yield (1027.2-5620.8 kg ha^-1). The study was undertaken to inheritance of grain yield and its components in bread wheat genotypes. Analysis of variance revealed that genotypes were significantly differed for all characters and suggested considerable variability for all yield and its attributing characters in the present material. High GCV and PCV values (>20) were obtained from grain yield, thousand kernel weight, days to heading, plant height whereas moderate GCV and PCV values (10 -20%) were obtained from days to maturity. High heritability estimates (>80%) wereobtained for grain yield (99.8%), thousand kernel weight (98.8), plant height (97), days tomaturity (97), days to heading (96.9). The higher heritability was observed for days toheading, 1000 kernel weight, grain yield, and days to maturity and plant height. Highheritability coupled with high genetic advance recorded for traits grain yield, and 1000kernel weight and these characters are governed by additive gene effects; a directionalselection for these characters would be more effective for the plaed genetic improvement.

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