Character association and path analysis for selection criteria in barley breeding under rainfed conditions

Mohtasham Mohammadi

Abstract


Sixteen barley genotype were grown in three growing season at Gachsaran Dryland Agricultural Research Station. Each experiment was
carried out in a randomized complete block design with four replications under rainfed condition. Main objective of the present study was
to estimate the correlations and partition of the coefficient of correlation between grain yield with its primary components, into direct and
indirect effects. The results obtained from 16 barley genotypes indicated that the coefficient of determination were 63 to 87% in three
growing season. It represents high influence of the considered traits on total variability of grain yield. The results of path analysis in three
growing season showed that barley grain yield were stably influenced by grain filling period, thousand kernel weight and the number of
tillers per square meter. It lead to conclude that barley grain yield could be improved via the above mentioned traits and these traits might
be used as criteria variables in barley breeding program. The influence of 1000 kernel weight on grain yield in three environments seems
to cause from the fact that grain yield in barley is frequently limited by source capabilities and it has suggested as a promising trait for
increasing barley grain yield under different water stress conditions.


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