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

Abstract

The present investigation was undertaken to study the genetic variability, heritability and correlation coefficient analysis for 7 metric traits in 12 durum wheat genotypes at western Oromia during 2015-2018. Significant genotypic differences were observed for the majority traits studied, indicates considerable amount of variation among genotypes for each character. The estimates of genotypic coefficient of variation (GCV) and phenotypic coefficient of variation (PCV) were high for kernels per spikelet, thousand kernels weight, and number of kernels per spike and grain yield. The remaining traits were ranged from low to moderate estimates. High heritability estimates were recorded for the majority traits studied. The estimated broad – sense heritability (h2) has ranged from 31.6% for maturity to 80.8% for grain yield. High genetic advance combined with high heritability was recorded for plant height, thousand kernel weight, kernels per spike and grain yield, indicates that most likely selection based on phenotype of genotypes could be effective to improve these characters. Grain yield was positively and significantly correlated with spike length, kernels per spike and thousand kernels weight both at genotypic and phenotypic levels. The strong correlation of grain yield with the mentioned traits showed that grain yield could be indirectly improved through improving these traits. This information might be used in the genetics and breeding programmes for improvement of durum wheat.

Studies on the nature of relationships between grain yield and yield-related traits in durum wheat (Triticum durum Desf.) populations

“…The rather large difference between the CV p and CV g values for some traits is due to the greater contribution of the environmental variance to the phenotypic variability. The above statement is fully supported byGerema (2020) who observed moderate and low CV p and CV g for plant height and days to maturity, respectively.…”

“…Breeders are actually looking for other selection assistance methods more effective and easier to handle. Indeed, it is very interesting that the indirect selection method rapidly and efficiently identifies the best genotypes after the screening a sufficiently large number of segregating lines (Fellahi et al, 2018;2020). Applying the morphological and/or physiological traits as selection criteria is an interesting approach that attracts the attention of breeders and physiologists (Bennett et al, 2011;Mühleisen et al, 2013;Ben-Amar et al, 2020).…”

Productivity of Some Winter Wheat (Triticum aestivum L.) Varieties through Integrated Application of Vermicompost and Biochar in Sandy Soil

“…Some wheat varieties differ in their growth features, such as plant height, number of grains per spike, and weight per 100 grains. Gerema (2020) demonstrates that plant varieties differences in their growth and development and that these changes are due to the plant's morphological, physiological, and biochemical processes.…”

Exploring the Genetic Variability for Yield Attributing Traits among the Indigenous and Exotic Collection of Wheat in Cis-Himalayan Region of West Bengal, India

“…According to Singh and Chaudhary [15], estimated genotypic and phenotypic coefficients of variation (GCV and PCV) were analysed and classified into three categories: low (10%), moderate (10-20%), and high (> 20%).On the basis of the above grouping, days to 50% flowering, flag leaf length, flag leaf width, spike length, number of grains spike -1 , test weight had moderate GCV and PCV, whereas awn length, peduncle length, plant height, and rAUDPC showed high GCV and PCV. Moderate GCV and high PCV were observed for grain yield plot -1 (Supplementary Table 2).…”

“…The present study was conducted at Cis-Himalayan plains of West Bengal which is located in the terai region where rice is the predominant crop with the rice-wheat cropping system being prevalent in adjoining areas with rice prevailing during the monsoon season and wheat in the rabi season [11][12][13][14][15]. The major problems for wheat cultivation in this region include short winter, early onset of monsoon, micro nutrient deficiency along with prevalence of foliar diseases such as spot blotch etc.…”