Combining ability analysis and heritability of yield components in linseed (Linum usitatissimum L.)
Halina Góral
khrin@urk.edu.plKatedra Hodowli Roślin i Nasiennictwa, Uniwersytet Rolniczy w Krakowie (Poland)
Maciej Ejsmond
Instytut Nauk o Środowisku, Uniwersytet Jagielloński w Krakowie (Poland)
Abstract
Variance of general (GCA) and specific (SCA) combining ability, genetic and environmental components of phenotypic variation and heritability coefficients of yield components in linseed were estimated using F2 hybrids obtained from diallelic crosses of several geographically diverse cultivars. The GCA of varieties differed significantly for all the analyzed traits, the SCA —for plant height and 1000 seeds weight, and the reciprocal effects — for the number of capsules per plant and 1000 seed weight. The heritability coefficients in narrow sense, computed from the analysis of variance and regression of progenies to parental means, were large for plant height and smaller for the number of seeds per capsule, 1000 seeds weight and seed yield per plot. The variation in the number of capsules per plant and in seed yield per plant was mainly affected by the environment, and these traits were not heritable. The coefficients of heritability in broad sense were similar to those in narrow sense, which means that genetic variation of these traits is mainly affected by the additive gene effects. This indicates that selection in early hybrid generations may be successful.
Keywords:
combining ability, heritability, linseed, yield componentsReferences
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Authors
Halina Góralkhrin@urk.edu.pl
Katedra Hodowli Roślin i Nasiennictwa, Uniwersytet Rolniczy w Krakowie Poland
Authors
Maciej EjsmondInstytut Nauk o Środowisku, Uniwersytet Jagielloński w Krakowie Poland
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