Genetic Parameters of Some Sorghum (Sorghum Bicolor (L.) Moench) Genotypes Under Water Deficit Stress

Abstract

orghum (Sorghum bicolor (L.) Moench) has a mighty adaptation possibility, which are important parameters of genotypes growing in severe conditions. This study focused on the differential responses of six genotypes under two levels of water deficit (20 and 40% decrease in water rate) compared with normal conditions during two seasons. Variance components and tolerance indices under different environments provide new chances for breeders to select genotypes, which have high yielding and are stress tolerant. The results showed the superiority in the performance of Shandawil variety under normal conditions, while Line 3 showed a marked superiority under high drought stress compared to other genotypes. The results of the variance components of most studied traits showed that the major contribution in phenotypic performance is due to the genetic variation. According to heritability in broad sense, the values ranged from 27.82 to 99.12%. With regard to the genetic advances, the results showed a clear discrepancy among the studied traits, as the characteristics of the plant height, fresh weight and grain yield of the plant recorded the highest genetic advance, while chlorophyll content recorded the lowest genetic advance of the plants.

Novel sources of drought tolerance in sorghum landraces revealed via the analyses of genotype-by-environment interactions

“…In line with this study, a high broad-sense heritability for drought-tolerance related traits, such as chlorophyll content and stay-green were reported in previous studies in sorghum ( Kapanigowda et al., 2013 ; Naoura et al., 2019 ; Ochieng et al., 2020 ). However, low heritability of chlorophyll content in this crop has also been reported ( Badran (2020) . This difference may be due to the variation in the genotype, environment and genotype by environment interaction effects.…”

Heritability, genetic advance, and correlation studies of morpho-agronomic traits and brix in Burkina Faso sweet stalk sorghum genotypes

“…The identification of performant genotypes with desired traits and their subsequent use in breeding programs, using appropriate selection criteria, is essential for the success of breeding programs, especially under environmental stress conditions [20]. It is also well established that progress in crop improvement depends not only on the degree of variability of the desired trait in the source material but also on the level of heritability of the desired trait [21].…”