西南桦优良家系幼树期的选择研究  

Superior Family Selection of Betula alnoides at Sapling Stage

作　　者：周凤林[1] 李清 史富强[1] 

机构地区：[1]云南省林业科学院普文热带林业研究所,云南普文666102 [2]云南省林业职业技术学院,云南昆明650224

出　　处：《西部林业科学》2006年第3期53-56,共4页Journal of West China Forestry Science

基　　金：国际热带木材组织(ITTO)资助的"中国热带阔叶树种造林技术开发与示范"研究项目

摘　　要：对来自广西壮族自治区、云南省共计25个县(市)的381株西南桦优树的子代林进行了幼树期(2年生)的高生长性状选择。结果表明:在参试的381个家系中,幼树期高生长超过对照的优良家系有186个,占参试家系数的48.8%,其中Ⅰ级优良家系有63个,Ⅱ级优良家系有85个,Ⅲ级优良家系有38个;淘汰了195个家系,占参试家系数的51.2%,为评选适于云南热区的西南桦良种提供了阶段性依据。Using tree height as selection index, superior family selection of Betula alnoides at sapling stage was conducted on 381 families of 25 provenances from Guangxi and Yunnan. The results showed that among all the families, 186 families were superior families, which was accounted for 48.8 %. The numbers of grade Ⅰ, Ⅱ and Ⅲ superior families were 63, 85 and 38 respectively.

关 键 词：西南桦 优良家系 幼树期选择 

分 类 号：S792.159[农业科学—林木遗传育种]