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Studies on Selection of Superior Families in Seed Orchards of Masson Pine
Author(s): YANG Zhang-qi
Pages: 232-
235
Year: 2006
Issue:
3
Journal: GUANGXI SCIENCES
Keyword: 马尾松; 种子园; 子代测定; 优良家系; 选择; 遗传力;
Abstract: 对广西南宁地区林科所种子园,藤县大芒界种子园和贵港市覃塘种子园的440个马尾松(Pinus massoniana Lamb.)自由授粉子代进行年度和地点重复的半胞子代测定试验,以本地马尾松等11个对照来分析马尾松自由授粉子代的遗传变异规律,并根据遗传稳定性和材积生长快慢,采用性状表现水平分析法从中选择出优良家系.结果表明,440个参试家系中有20.0%~98.0%的家系树高比对照大8.3%~67.7%,有5.5% ~99.0%的家系胸径比对照大11.4%~106.9%、有9.1%~99.0%的家系材积比对照大29.2%~484.6%.评选出适合在广西普遍推广的广普性优良家系64个,局部推广的局部性优良家系48个,需淘汰的家系83个;选择出的优良家系在11年生子代林中,材积生长量比对照大64.71%~94.51%.用子代林数据估算马尾松各性状的家系遗传力,树高遗传力为0.306~0.724,胸径为0.174~0.686,单株材积为0.286~0.677.
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