Evaluation of High Resin Yielding Half Sib Families of Pinus Roxburgii Sargent for Growth Traits

Field experiment was conducted for evaluation of high resin yielding half sib families of Pinus roxburghii Sargent for growth traits at Shilli Conservation Reserve, Solan, Himachal Pradesh during the year 2020-2021. Traits like height, diameter at breast height, bark thickness, crown height and crown length were studied. The study revealed that all the traits varied significantly, with mean values of diameter at breast height (31.10 cm), height (17.79 m), bark thickness (2.81 cm), crown length (10.75 m) and crown height (6.95 m). Variability estimates, genetic parameters, correlation studies, principal component analysis and divergence study exhibited high variability among all the half sib families. It may be concluded that evaluation of the chir pine diversity can be very useful in qualitative and quantitative improvement of different traits studied.