Hayman’s diallel analysis for yield and attributing traits in sesame (Sesamum indicum L.)

Abstract

Eight sesame (Sesamum indicum L.) genotypes were crossed in a half diallel mating fashion. The analysis of variance for combining ability revealed that the mean sum of squares are due to the general combining ability were highly significant for all the traits. The t 2 test specified the fulfillment of assumptions required under diallel analysis for all the traits studied except the number of effective branches per plant, capsule length (cm) and harvest index (%). The component D measures the additive effects of genes. It was significant for all the traits except seed yield per plant and harvest index. The components H 1 and H 2 were significant for all the traits except days to maturity revealing the importance of fixable and non-fixable component. Greater values of H 1 than H 2 and the ratio of H 2 /4H 1 (< 0.25) confirmed the unbalanced distribution of gene at the loci in the parents' implying dominance for all the traits. It was also confirmed by greater than one value of KD/KR components for all the traits which suggested the higher frequency of dominant genes than recessive genes in the parents. The component F was significant for days to flowering, days to maturity, capsule length, oil content and leaf area per plant. The graphical analysis showed the regression line intercepted Wr axis below the origin indicating over dominance for plant height, the number of seed per capsule, oil content and leaf area per plant. The regression line intercepted the positive side of Wr axis for days to maturity which implies the presence of partial dominance.

Diallel analysis of common bean (Phaseolus vulgaris L.) genotypes for seed dietary fibre, carbohydrate, calcium and phosphorus contents

“…"Moreover, to achieve knowledge on the heredity of a trait, several mating schemes are available, including diallel crosses". Ceyhan et al (2014) and Gami et al (2020) asserted that diallel crosses are the fastest method to understand the heredity of quantitatively traits and find out the predominance of parents. "Thus, estimation of general combining ability (GCA) of each parent would contribute to develop highly potential genotypes with specific combining ability (SCA) effect in order to evaluate the hybrid performances in diallel crosses".…”

Diallel analysis using graphical &amp; numerical approach for grain yield &amp; its attributes in bread wheat (Triticum aestivum L.)

“…During breeding of high yielding varieties of crop plants, breeders are continually challenged with the problem of parent selection. Though elimination of poor crosses on the basis of their performance in initial generation has been suggested; but information on the genetic architecture of yield and its components will help to sort out the improved crosses more competently 3 . Several reports in the past indicate that the diallel analysis is the easiest method of understanding the genetic nature of quantitatively inherited traits and to ascertain the prepotency of parents.…”

Genetic studies of yield components and pungency in chilli (Capsicum annuum L.) genotypes through Hayman’s approach

“…Hayman (1954) stated that the dialell analysis method can also predict gene interactions, the influence of dominance and additives, gene distribution and can determine the heritability value of both broad and narrow meanings. The Hayman approach dialell analysis method aims to obtain information on the inheritance of an observed character (Gami et al, 2020).…”