摘要
通过对杉木57个自由授粉家系进行子代测定,结果表明,8 a生杉木种子园树高、胸径和材积分别超过对照5.82%、11.67%和31.08%,变异系数分别为20%、22.16%和58.44%.方差分析结果表明,树高、胸径和材积家系间差异显著.树高、胸径和材积的单株遗传力分别为0.26、0.35和0.36,家系遗传力分别为0.56、0.69和0.68.以材积超过家系平均值15%为入选标准,选择出优良家系13个,平均遗传增益为22.9%.
The result of progeny test of 57 open-pollinated families of Cunninghamia lanceolata showed that height、DBH、volume of 8-years seedlings in seed orchard exceeded 5.85%、11.67% and 31.08% of those contrasts,and the CV was 20%、22.16% and 58.44% respectively.The variance analysis showed there were significant difference among timber families in height、DBH and volume,and individual heritability was 0.26、0.35 and 0.36,and family heritability was 0.56、0.69 and 0.68 in order.Those 15% volume exceeding family averages as a criterion,13 super families were selected,which average genetic gain was 22.9%.
出处
《林业调查规划》
2010年第4期136-138,共3页
Forest Inventory and Planning
关键词
杉木
自由授粉
子代测定
遗传增益
Cunninghamia lanceolata
open-pollinated
progeny test
genetic gain
