Variation Analysis of Growth Traits and Coning Quantity of Pinus sylvestris var. mongolica Clones

doi:10.7525/j.issn.1673-5102.2020.02.008

Abstract

Abstract: In order to obtain high yield and excellent quality resources of Pinus sylvestris var. mongolica, 304 P.sylvestris var. mongolica clones from the forest tree seed orchard in Baicheng City of Jilin Province were taken as materials, growth traits(tree height, basal diameter, diameter at breast height, diameter at 3 m height, canopy, branch angle and lateral branch thickness) and coning quantity characteristics(coning quantity of 2015, 2016 and 2017) of different clones were investigated. By variance analysis, all the traits were significant different(P<0.01) except for canopy. The coefficients of phenotypic variation of all the traits ranged from 3.79%-65.22%. Repeatability range from 0.24-0.70; By correlation analysis, the existed significantly positive correlation among all the growth traits(0.181-0.896) except for lateral branch thickness with diameter at 3 m height(0.082). Most of growth traits with the different age of coning quantity was not significantly correlation By growth traits, with the selected rate by 5%, 15 clones were selected as excellent clones, the genetic gains of height, basal diameter, diameter at 3 m height, branch angle and lateral branch thickness of the selected clones were 5.47%, 4.48%, 15.18%, 11.78%, 2.38% and 6.66%, respectively. When evaluated clones by coning quantity characteristics, with the selected rate by 5%, 15 clones were selected as excellent clones, the genetic gains of coning quantity of 2015, 2016 and 2017 of the selected clones were 2.89%, 46.32% and 13.88%, respectively. This study provides materials for the selection of excellent clones of P.sylvestris var. mongolica seed orchard, and also provides a basis for the breeding of P.sylvestris var. mongolica for west of Baicheng, Jilin Province.

Key words: Pinus sylvestris var. mongolica, clones, growth traits, coning yield characteristics, genetic gain

CLC Number:

S791.253

LI Jia-Qi, HAN Xi-Dong, MA Ying-Hui, LI Yue-Ji, WANG Li-Xiang, HAN Xi-Tian, LIU Zhi, LI Hai-Min, ZHAO Xi-Yang. Variation Analysis of Growth Traits and Coning Quantity of Pinus sylvestris var. mongolica Clones[J]. Bulletin of Botanical Research, 2020, 40(2): 217-223.

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