Abstract

The study was conducted to determine the genotypic and phenotypic correlations between different traits of linseed genotypes, and the direct and indirect effect of different traits on seed yield using simple lattice design with two replications during 2019 cropping season at Ambo University Guder Campus. In present study  harvest index, number of seed per capsule, days to maturity, plant height and days to   flowering  and were manifested positive and highly significant (p ≤ 0.01) association  with seed yield at  both genotypic and phenotypic level. The genotypic correlation coefficients were higher than the phenotypic correlation coefficients demonstrating that, the observed relationships among the various traits were due to genetic causes indicating the phenotypic expression of correlations is reduced under the influence of the environment. Path coefficient analysis revealed that higher and positive direct effect on seed yield were exhibited by  days to maturity, plant height and number of seeds per capsule  at both genotypic and phenotypic  level. The traits those have maximum positive direct effects indicates that a given other traits are kept constant, increasing one of those characters will increase seed yield. The analysis indicated that, days to maturity, plant height and number of seeds per capsule is the major contributors for the improvements of seed yield in linseed and might be used as key criteria in linseed selection.

Key Word: Correlation, Direct effect, Indirect effect, Path coefficient, Seed yield