Assessment of Genetic Variability, Heritability and Genetic Gain in Advanced Mutant Breeding Lines of Sesame (Sesamum indicum L.)

Abstract

In present investigation, 133genotypes comprised of advanced mutant breeding lines, germplasm lines, genotypes pertaining to Initial Varietal Trial, Advanced varietal Trial and Multi Location Trial, popular varieties national, zonal and local checks were evaluated for assessment of genetic variability at Regional Agricultural Research Station, Jagtial with Randomized Block design in 3 replications. Influence on breeding programmes is especially based on the extent to which variability occurs and the relative amount of variation in the different traits. It is measured by determining the genotypic coefficient of variance (GCV) and phenotypic coefficient of variance (PCV). Since heritability may be affected by environmental factors, information of predicted genetic gain will be more helpful in the selection process. Genetic advance (GA) on the other hand refers to the improvement of traits in genotypic value for the new population in comparison with the original population. From the above investigated material, the highest GCV and PCV was observed for traits seed yield per plant followed by number of capsules per plant, number of branches per plant and phyllody (% incidence). The heritability estimates were high for days to maturity followed by days to 50 % flowering, plant height, seed yield per plant, number of branches per plant, number of capsules per plant and phyllody (% incidence). High heritability coupled with high GAM indicates the presence of additive gene action for the characters and they are inherited through simple selection. K e y w o r d sPCV, GCV, heritability, GAM, mutant breeding lines, diseases

Genetic diversity and association of yield‐related traits in sesame

“…Conversely, Divya et al. (2018) and Aye and Htwe (2019) reported high heritability and high genetic advance for plant height and number of capsules per plant in Indian and Myanmar sesame germplasm collections. Traits with high heritability and high genetic advance are reported to be under the control of additive gene action.…”

“…In the present study, higher heritability and genetic advance were computed for the number of secondary branches. Conversely, Divya et al (2018) and Aye and Htwe (2019) Association analysis of economic traits is vital to improve selection efficiency for breeding. In the present study, genetic correlation analysis revealed positive and highly significant associations between seed yield per hectare with thousand seed weight, and oil yield per hectare number of seeds per capsule and number of capsule per plant with oil yield (Table 5).…”

“…Key yield influencing traits in sesame include the number of branches per plant, number of capsules per plant, number of seeds per capsule, thousand seed weight, oil content and oil yield (Divya et al. 2018; Kalaiyarasi et al. 2019).…”

“…High heritability estimates were reported in sesame for days‐to‐50% flowering, days‐to‐75% maturity, plant height, number of branches, number of capsules, number of seeds per capsule, thousand seed weight, seed yield per hectare and oil content in Ethiopia, India and Myanmar (Aye & Htwe, 2019; Divya et al. 2018; Gidey et al. 2012; Hika et al.…”

“…In Turkey, Iran and Pakistan, oil yields of 0.65, 0.57 and 0.29 ha -1 were reported, respectively (Caliskan et al 2004;Jan et al 2014;Tabatabaei et al 2011). Key yield influencing traits in sesame include the number of branches per plant, number of capsules per plant, number of seeds per capsule, thousand seed weight, oil content and oil yield (Divya et al 2018;Kalaiyarasi et al 2019). Oil yield is a product of seed yield and oil content (Shimelis et al 2008).…”