Genetic Improvement in Grain yield and Yield Related Traits of Durum wheat (Triticum turgidum var.durum L.) in Ethiopia

Variability, Heritability and Genetic Advance Analysis in Bread Wheat (Triticum Aestivum L.) Genotypes in Northwestern Ethiopia

“…Genetic advance of days to physiological maturity was non-significant positive trends over years in tested bread wheat genotypes. This study was in line with the reports of Mekuria et al (2018) in durum wheat and Teklu and Tefera (2005) in tef. Genetic advance of plant height was non-significant positive trends in bread wheat genotypes, whereas plant height was decreased significantly in durum wheat genotypes as reported by Mekuria et al (2018) Annual genetic advance of spike length was non-significant decrease in bread wheat genotypes over 18 years, while spike length was decreased significantly in durum wheat genotypes and linseed lines as reported by Mekuria et al (2018) and Wondimu (2010) respectively.…”

“…Genetic advance of thousand seed weight was significant positive trends in the tested bread wheat verities over years. Similar works were reported by Mekuria et al (2018); Tibebu (2011) and Tamene (2008) in durum wheat, cheakpea and fababean genotypes, respectively, over years. Genetic advance of test weight was nonsignificant positive trends in bread wheat genotypes over 18 years.…”

“…Genetic advance of number of seed per spike was non-significant negative trends in bread wheat genotypes over years. On the other hand, genetic advance of number of seed per spike was significant positive trends in durum wheat genotypes and in bread wheat genotypes as reported by Mekuria et al (2018) and Amsal et al (1995) respectively. Genetic advance of thousand seed weight was significant positive trends in the tested bread wheat verities over years.…”

“…This might be due to breakdown of rust resistance of the bread wheat genotypes as well as inconsistency in performance of genotypes across the test environments. However, significant increase in grain yield of relatively recently released genotypes over older variety was reported by Mekuria et al (2018) in durum wheat genotypes, Tibebu (2011) in check pea genotypes, Demissew (2010) in soybean genotypes and Wondimu (2010) in food and malt barley genotypes. In biological yield, there was non-significant annual rate of genetic advance (77 kg/ha/year) in bread wheat genotypes over 18 years.…”

“…As Mekuria et al (2018) reported, estimation of genetic progress in variety development help breeders to make a decision on the increment of productivity as well as to consider the breeding strategies in the future. Hereby the study was initiated with the objectives to analyze the performance, genetic variability, heritability, extent of genetic advance and genetic improvement of grain yield and agronomic traits in bread wheat released genotypes over 18 years.…”