Genetic Variability, Heritability and Genetic Advance Among Bread Wheat Genotypes at Southeastern Ethiopia

Abstract

The knowledge of nature and magnitude of variation existing in available breeding materials is great importance for successful selection of varieties. This study was conducted to generate information on the extent of genetic variability in advanced bread wheat lines. Thirty bread wheat genotypes were tested at Sinana and Agarfa, Southeastern Ethiopia, in alpha lattice design with three replications. Combined over locations ANOVA was carried out for yield and yield related traits. There were highly significant differences among genotypes for all traits. Highly significant location effects at P < 0.01 were observed for yield and yield related except for harvest index which showed significant effect at P < 0.05 and grain yield non-significant location effect. This indicates the presence of variability for these characters among the tested genotypes. In combined analysis, grain yield had high PCV (27.1%) and moderate GCV was observed for biomass weight, grain yield and harvest index. Phenotypic coefficient of variance (PCV) moderate for biomass weight and harvest index. Heritability estimates in broad sense (H 2) was very high for most of the characters except for grain yield (52.3%) and number of kernel per spike (73.2%). However, low GAM was observed for most of the characters except moderate GAM was observed for harvest index (15.9%). Finally, the presence of variability among the genotypes, performance of heritability and GAM in the tested traits of the genotypes confirmed possibility to increase wheat productivity. Hence, selection and hybridization on those genotypes can be recommended for farther yield improvement of bread wheat.

Evaluation of durum wheat (Triticum turgidum) genotypes for genetic variability, heritability, genetic advance and correlation studies

“…High heritability and genetic advance as percent of mean were found in plant height, thousand kernel weight, kernels per spike and grain yield, indicates that most likely the heritability is due to additive gene effects and selection may be effective in early generations for these traits. This finding was agreed with the result of Tilahun et al (2020).…”

“…High genotypic variability (σ 2 g) and Phenotypic variability (σ 2 p) was recorded for number of kernels per spikelet with the value of 146 and 177.3, respectively, while lower values were observed for spike length (1.3 and 2.2) ( Table 2) .Phenotypic variance was higher than genotypic variance for all the yield and yield contributing characters, which indicates the influence of environmental factors on these traits. Tilahun et al (2020) and Alemu et al (2020) also reported that phenotypic variance was higher than genotypic variance for all the yield and yield contributing characters.…”

Genetic Variability, Heritability and Genetic Advance Study in Bread Wheat Genotypes (&lt;i&gt;Triticum aestivum &lt;/i&gt;L.)

“…Through this studied, low GCV and PCV reported by earlier researchers for days to heading, [5,25,36]; days to maturity [5,24,25,36]; grain filling period [5,8,25,36]; and hectoliter weight [5,24,25].…”

“…Previous studies [1,2,24] found very high estimates of broad sense heritability. Previous researchers have reported medium estimates of broad sense heredity for days to heading [14], days to maturity [38], hector liter weight [11,25], and grain yield [5,25,28]. Low estimates of broad sense heritability also reported by previous researchers for grain filling period [1,14,26].…”

Evaluation of Bread Wheat Advanced Lines Under Salinity Conditions Using Tolerance Indices

“…(2018),Jaur (2019),Khanzada et al (2019),Mishra et al (2019),Shah et al (2019),Al-Naggar et al (2020),Bayisa et al (2020), Ferede and Worede (2020) andNizamani et al (2020).…”