Evaluation of growth performance of half sib progenies of Toona ciliata M. Roem under field conditions

摘要

The study was conducted to evaluate the juvenile growth performance of half sib progenies of twenty four genotypes of Toona ciliata M. Roem under field conditions of Punjab, India. Seed source (S3) Ludhiana exhibited outstanding performance for growth parameters. Among genotypes progenies of S3G7 (Ludhiana), S3G8 (Ludhiana), S1G1 (Talwara) and S2G4 (Kamahi Devi) were found to be most promising for growth traits. The phenotypic coefficient of variation values were observed higher for all the parameters than genotypic coefficient of variation. Moderate heritability and genetic gain was observed for branch angle and plant height. Highly significant and positive genotypic and phenotypic correlations were observed for plant height with collar diameter and stem straightness and collar diameter with number of branches per plant. The genotypes were clustered into three distinct groups with maximum diversity of (30.68) between clusters I and cluster III and can be utilized for future heterotic breeding.