摘要
利用80个杉木第二代种子园单亲子代家系在福建省卫闽国有林场营建子代测定林,对连续5 a调查数据的分析结果表明,不同家系各年树高、胸径、材积、冠幅差异均达极显著水平。遗传参数估值表明,除冠幅外的其它生长性状均受到中度的遗传控制。利用试验林3年生和5年生时的树高、胸径、材积构建指数选择方程组对参试子代进行联合选择,评选出甲2、戊1、丁96等8个优良家系及这些家系内的I1、I2、I3等15个优良个体;评选出的优良家系5年生时树高、胸径、材积平均遗传增益分别为2.61%、6.39%和16.98%,优良个体5年生时平均树高、胸径、材积比群体均值分别大29.41%、76.39%和231.77%;研究结果还表明丁65、乙22、丁32等7个家系生长表现极差,应予以淘汰。
Progeny test forest was built by 80 one-parent progenies of the second generation seed orchard of Cunninghamia lanceolata on National Forest Farm of Weimin, Shaowu City in Fujian Province. The data which was investigated for five consecutive years was analyzed and the results showed that there were very significant differences among families on tree height, dbh, timber volume and crown of different families. The estimations of genetic parameters indicated that all the growth traits were generally controlled by medium genetic factors except crown. Combined selection was implemented based on index selection equation group built with tree height, tree breast diameter and timber volume of 3-years-old and 5-years-old stands. 8 superior families such as Jia2, Wul, and Ding96 etc. and 15 superior individuals inside these families such as I1, I2, and I3 etc. were selected. The average genetic gains of tree height, breast diameter and timber volume of 8 superior 5-years-old families were 2.61%, 6.39 % and 16.98%respectively. The average tree height, dbh and timber volume of 15 superior 5-years-old individuals were 29.41%, 76.39%, 231.77% more than population average value respectively. At the same time 7 the worst families such as Ding65, Yi22, and Ding32 etc. were selected for eliminating from breeding population.
出处
《福建林业科技》
2009年第1期1-6,共6页
Journal of Fujian Forestry Science and Technology
基金
福建省林木种苗科技攻关项目"杉木高世代遗传改良和良种生产技术研究"
福建省科技重大专项项目(专题编号:2006NZ0001-2)
关键词
杉木
第二代种子园
子代测定
联合选择
Cunninghamia lanceolata
the second generation seed orchard
progeny test
combined selection