Evaluation of Genetic Variation of the Breeding Lines Isolated from Sesame (Sesamum indicum L.) landraces

پژوهشهای زراعی ایران

Article 4, Volume 10, Issue 4 - Serial Number 28, January 2013, Pages 659-666   

Document Type: Research Article

DOI: 10.22067/gsc.v10i4.20343

Authors

F Nasiri^* ; Gh Saeedi

Abstract

This study was carried out to evaluate the genetic diversity of the breeding lines isolated from the sesame landraces. Seventy genotypes were evaluated in randomized complete block design with two replications in 2008. The results showed that there were significant differences among the genotypes for all of the studied traits such as days to maturity, plant height and seed yield. There was no difference between the phenotypic and genetic coefficients of variations for most of the traits, thus it was concluded that the majority of their observed variations was due to the genetic factors. The grain yield of the genotypes ranged from 1089 to 4650 kg/ha. One of the breeding line isolated from Birjand landrace had the highest mean of days to maturity (170 days) and Yekta genotype had the lowest mean for this trait (118 days). The range of plant height among genotypes was 123 to 179 cm and the mean of capsule per plant was ranged from 46 to 181. Branches per plant had the highest broad-sense heritability (81.1 %) and the estimated broad-sense heritability for grain yield was 75.5%. Cluster analysis classified the genotypes in three distinct groups and there were significant differences among these groups for all of the traits, except days to maturity. Genotypes classified in the second group had the most capsule per plant and grain yield and they can be used for genetic improvement of this trait. Meanwhile genotypes of the first group can be used for genetic improvement of plant height and branches per plant.

Keywords

Genetic variations; Agronomic traits; Cluster analysis; Sesamum indicum L