Abstract
The genotype interaction study of established clonal trials of Gmelina arborea was estimated for different the growth characters in the three different environmental conditions. Total 25 numbers of selected clones were established. Among the clones, across the three environments for collar diameter (CD) best clone observed GA096, GA034, GA104. Considering the height (Ht) clone number GA116, GA103, GA96 shows best and for the number of branches (Br) the clones GA045, GA016, GA099 resutled best. Estimation of genetic parameter of genotypic coefficient of variation (GCV) for all the traits collar diameter, height and branches per plant resulted 13.96%, 11.54% and 11.74%, respectively. The phenotypic coefficient of variation (PCV) recorded 18.14%, 19.62 % and 22.32%, respectively. Heritability (h2) recorded 9.19%, 34.64% and 27.69% respectively. The genetic advances, as percent of means are 22.12%, 14.00% and 12.73% for collar diameter, height and branches per plant respectively.
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