Progeny Evaluation of Melia composita for Growth and Yield Traits under Semi-Arid Climatic Conditions
DOI:
https://doi.org/10.36808/if/2023/v149i12/169407Keywords:
Melia composita, Progeny Evaluation, Genetic Variability, Growth Performance, Volume.Abstract
The present study aimed to evaluate the ten-years-old twenty progenies collected from diverse areas of Punjab for growth and yield traits under semi-arid climatic conditions. Significant differences (p<0.05) were observed among progenies for the characteristics studied. Progeny 1 exhibited outstanding performance for all traits except number of branches. Majority of parameters studied were less influenced by the environment conditions and thus reflect the variability for the traits in Melia composita is tightly linked with the genotypic constitution. In general, the heritability varied from 20.95% (crown length) to 72.28% (straightness). High Heritability with high genetic gain was observed for DBH and high heritability coupled with moderate genetic gain was observed for the characters like number of branches and total height. Genotypic correlation coefficient higher than phenotypic correlation coefficient revealed the less effect of the environment on the expression of these traits and would be helpful in future breeding programs. Path coefficient analysis revealed that the highest positive direct effect for total height followed by number of branches and straightness both 2 at genotypic and phenotypic level. Based on the relative magnitude of D values, twenty progenies were clustered into five clusters, of which highest inter-cluster distance was observed between cluster 2 and 4 which are considered as most divergent clusters. Progeny 1 and 2 were promising one on the basis of Index score analysis. Therefore, the present study helped to identify the most distant accessions and most closely placed ones for future breeding experiments to obtain hybrid vigour.References
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