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主伐龄期马尾松半同胞子代测定林的变异分析及选择(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2016年05期
Page:
47-54
Column:
研究论文
publishdate:
2016-09-30

Article Info:/Info

Title:
Variation analysis and selection on half-sib progeny tested forests of Pinus massoniana at the ages of final cutting
Article ID:
1000-2006(2016)05-0047-08
Author(s):
WU Zijuan1 WU Hong2 WANG Guoliang2 LI Xianwei1 FAN Chuan1* XIAO Baoru1 WANG Xiaojun1 CHEN Silu1
1. Forestry Ecological Engineering in Upper Reaches of Yangtze River Key Laboratory of Sichuan Province, College of Forestry, Sichuan Agriculture University, Chengdu 611130, China;
2. Fushun National Forest Farm of Sichuan Province, Zigong 643200, China
Keywords:
Pinus massoniana half-sib progeny genetic variation selection
Classification number :
S722
DOI:
10.3969/j.issn.1000-2006.2016.05.008
Document Code:
A
Abstract:
In order to evaluate and select superior germplasm of Pinus massoniana in Sichuan Province, the analysis and genetic evaluation of growth traits(tree height, DBH and stem volume)and stem-form qualities(crown width and under-branch height)were conducted on 3 groups of half-sib progeny tested forests of P. massoniana at the age of 27,28 and 29 years, respectively. The results showed that significant differences were available in growth traits and stem-form qualities among different families. The average tree height, DBH, stem volume, crown width and under-branch height of families were controlled by genetics at medium level or above, which revealed high selection potential among or within families. Stem volume presented large genetic variation among families, followed by DBH and tree height. Strongly positive phenotypic and genetic correlations existed among tree height, DBH and stem volume. Superior middling correlations were observed in crown width and under-branch height with growth traits. Twenty-one superior families were selected by the Smith-Hazel comprehensive index method.For the twenty-one selected families, the average height, DBH and stem volume were 14.05 m, 17.07 cm and 0.157 6 m3, the average genetic gains were 7.65%, 12.33% and 39.21%. Fifty-four superior individuals were selected by the families-individuals comprehensive method, their average height, DBH and stem volume were 15.53 m, 24.98 cm and 0.341 4 m3, the average genetic gains were 13.61%, 44.95% and 164.98%. The selected superior families and individuals can provide improved seeds for the oriented cultivation of P. massoniana in southwest China, or selected materials for advanced generation orchard.

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Last Update: 2016-10-30