Path analysis of mrphological traits and forage yield on several populations of Lolium species.

Document Type : Research Paper

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Abstract

Lolium is an important genus because of its rapid growth, palatability, high yield potential, cold resistance, and ground covering during cold seasons. The research was carried out to study genetic variation and relationship between the traits on six populations of three Lolium species during 2003. Morphological traits such as tiller number, leaf length, leaf width, stem length and dry matter yield were measured from 4 single plants on each experimental plot. The data were analyzed using RCBD with three replications. Correlation coefficients were estimated between all paired combinations of the traits. Path coefficient analysis was also applied on the morphological traits. Results revealed significant variation among the populations for the traits. Genetic correlation coefficient between dry matter yield and tiller number was significant. Path coefficient analysis revealed that stem length had the highest direct effect on dry matter yield. Leaf length had high direct effect and non significant genetic correlation with tiller number and leaf width. Therefore, leaf length is a good selection criterion to be used for improving Lolium cultivars with higher dry matter yield.  

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Iranian Journal of Rangelands and Forests Plant Breeding and Genetic Research
Volume 18, Issue 2 - Serial Number 2
February 2011
Pages 294-304

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