尾叶桉家系子代测定及育种值的估算  

Study on Integrated Selection and Estimated the Breeding Value of Eucalyptus urophylla Family Progenies

作　　者：卢国桓 陆钊华[2] 徐建民[2] 赵汝玉 黎元伟 李光友[2] 

机构地区：[1]广东省江门市新会区林业局,广东新会529100 [2]中国林科院热带林业研究所

出　　处：《广东林业科技》2003年第4期1-6,共6页Forestry Science and Technology of Guangdong Province

基　　金：世界银行贷款NAP( 1991~ 1995 )和FRDPP( 1996~ 2 0 0 1)"桉树速生丰产林培育技术的研究与推广"内容之一

摘　　要：对尾叶桉 36个家系子代生长性状、形质性状进行差异分析和遗传分析 ,结果表明 :各性状在家系子代间差异均极显著 ,家系遗传力大于单株遗传力 ,生长性状相互间表型及遗传相关紧密 ,但与形质性状相关不显著 ,而形质性状相互间表型相关紧密。 3年生时生长最好的No .11号家系子代的单株材积达0 .0 4 6 0 4m3,是最差子代No .12号的 2 .6 8倍 ,是群体均值的 1.5 2倍。运用指数选择法对家系进行多性状综合选择 ,选出 4个优良家系和 6个生长慢、形质差的家系。并估算了家系子代各性状的育种值。The analyzed results of Eucalyptus urophylla progenies tested trial involving 36 family progenies showed that there were highly significant differences among growth and other traits at family level. Correlation between growth and form quality characters were not significant. Heritability of families was larger than individual heritability. At 3 years age, Mean individual volume of the best progeny No.11 with 0.046 04 m3 was 2.68 times than the worst progeny No.12 and 1.52 times by comparison with the average of total progenies. Using index selection of multiple characters, 4 superior and 6 inferior progenies would be selected from tested 36 family progenies population, and their genetic gain of height, D BH , H/D BH , S V, S F and B R of those superior families will be reached at 11.54%,8.31%,1.84%,27.93%,0.93% and 5.22% respectively. The breeding value of all progenies were estimated synchronously.

关 键 词：尾叶桉 家系子代 指数选择 育种值 

分 类 号：S792.39[农业科学—林木遗传育种]