Study of heritability and genetic efficiency in advanced sesame lines using REML/BLUP approach

Estimation of heritability is crucial in choosing the breeding path of different traits in crop plants. To study heritability and genetic efficiency in ۱۴ advanced sesame lines and Oltan cultivar as check variety, an experiment was performed using a randomized complete block design with four replications at Moghan Agricultural Research Station during the ۲۰۱۷-۲۰۱۸ crop years. During the experiment, traits including the number of days to flowering, growth period, plant height, number of capsules per plant, capsule length, ۱۰۰۰-seed weight, seed, and oil yield were recorded. The restricted maximum likelihood (REML)/Best Unbiased Linear Prediction (BLUP) approach was used to estimate genetic parameters, heritability, and genetic advance in advanced sesame lines using R software package. The results showed a significant positive genetic correlation between the number of days to flowering with growth period, seed yield with oil yield, the number of capsules per plant with oil yield, and the number of days to flowering with plant height at ۰.۰۱ percent probability level. The lowest and highest broad-sense heritability belonged to the growth period (۰.۱۲) and ۱۰۰۰-seed weight (۰.۷۱). The maximum and minimum genotypic and phenotypic coefficients of variations belonged to oil yield (۱۵.۰۸ and ۱۸.۱۵) and growth period (۰.۶۰ and ۱.۷۴). The highest genetic advance and genetic advance as a percentage of the mean (GAM) were observed in seed (۲۷۷.۰۷ and ۲۴.۲۴) and oil (۱۵۲.۵۰ and ۲۵.۸۰) yield traits. It can be concluded that the selection approach in sesame breeding lines has the maximum efficiency in achieving the desired high-yielding genotypes in its breeding program.

کلیدواژه ها:

Breeding ، Genetic advance ، Genetic parameters ، Selection ، Yield