摘要
对昆明、永平 2个云南松种源试验林和石屏、建水 3个 3～ 4年生云南松自由授粉子代试验林进行遗传分析及综合选择 ,结果表明 :云南松高、径生长 ,木纹理通直度 ,木材密度和松脂含量在家系间、单株间差异显著 ,其中树高遗传力估值为 :0 2 8～ 0 5 75 ,地径遗传力估值为 :0 16～ 0 6 6 6 ,材积遗传力估值为 :0 5 2～0 6 7,木纹理通直度的遗传性被高度控制 ,估值达 0 85 ;木材密度次之 ,估值为 :0 5 2～ 0 83;松脂含量的遗传力估值为 :0 4 5 3～ 0 73。借助于约束或非约束选择条件能有效地进行生长、形质和材性兼优家系、单株的选择 ,综合评选出牛达 39号、龙朋 5号、双柏鄂嘉 17号等 32个优良家系。入选的优良家系高生长实际增益30 6 3% ,遗传增益 16 85 % ,说明依据主要性状联合评选出的家系其优良性能是极其显著的。试验还在 2个种源试验林内共同选出广西乐业、贵州兴义、云南双柏、云龙、富宁、开远 6个优良种源、 2 7个优良单株 ,为进一步开展优良家系、单株的选择 ,提供了物质基础。这批家系和单株适宜在单试点、双试点或多试点上推广应用。
Genetic analysis and comprehensive selection were carried out on two provenance trials located at Kunming and Yongping, three free-pollination progeny forests of 3 to 4 years old were conducted at Shiping and Jianshui, the experimental results shows that there are significant differences on height growth, diameter growth, straight of grain, timber density and resin content, between different families and individuals of Pinus yunnanensis.The hereditability estimated value of tree height, basal diameter, volume, grain character, wood density and resin content are 0.28 ～ 0.575, 0.16 ～ 0.666, 0.52 ～ 0.67, 0.85, 0.52 ～ 0.83 and 0.453 ～ 0.73 respectively. Aided by restraint and nonrestraint condition, the selection of superior families and individuals with promising growth, quality and wood characteristics was fulfilled, 32 elite families were selected out, they were respectively coded as Niuda No.39, Longpeng No.5 and Shuangbai e'jia No.17 etc. The actual gain and genetic gain of height growth of these superior families obtain 30.63 % and 16.85 % respectively. The results indicated that the superior quality of selected families was quite significant. Besides, 6 superior provenances and 27 superior individuals were selected out from the two provenance trials, which provided further selection of superior families and individuals with experimentation materials.
出处
《云南林业科技》
2003年第4期1-11,共11页
Yunnan Forestry Science and Technology
基金
九五"国家林业科技攻关项目"云南松单板类人造板材良种选育及栽培技术研究"的部分内容
关键词
云南松
单株性状
遗传分析
自由授粉
子代试验
Pinus yunnanensis
superior family
individual
character
genetic analysis
comprehensive selection
