Estimation of combining ability, genetic components and heterosis in morphological characters of line x tester in Populus deltoides bartr. Dobhal Sneha1*, Sharma Samriti2, Lal Pankaj1, Gusain Himshikha3 1Uttarakhand University of Horticulture and Forestry, Ranichauri, UttarakhandIndia 2Chandigarh Group of Colleges, Landran, MohaliPunjabIndia 3HNB Garhwal University, Srinagar Garhwal, UttarakhandIndia *Email: sneh.adobhal001@gmail.com
Online published on 9 August, 2021. Abstract The present experiments were carried out in the Department of Tree improvement and Genetic Resources, Dr. Y.S.P.U.H.F, Nauni, Solan. The control crossing was carried out in the poplar clones and progenies were evaluated for the morphological characters. The overall performance of G-48 x L-17/92, L-62/84 x S7C1, L-62/84 x L-17/92, G-48 xL-124/86 and S1x S7C11 hybrids were found outstanding for most of the morphological traits. The high significant variances were recorded for most characters in the hybrids. The estimates of SCA were found to be more than the GCA variance for all the characters studied and the ratio of GCA to SCA was found less than unity. In gene action study, dominance variance was observed to be more than that of additive variance as such the ratio of additive genetic variance/dominance genetic variance was less than unity for all parameters studied whereas lines contribution found to be more than individual contribution of testers or line x tester interaction except for plant height, collar diameter, internodal length, leaf area, maximum width of leaf, shoot bark thickness, root bark thickness, fresh shoot weight, dry shoot weight, dry root weight, root length, total fresh weight and total dry weight. Top Keywords Combining ability, Crossing, Geneaction, Hybrids, Morphological. Top |