文献类型：期刊文献

中文题名：广西西南桦天然居群的表型变异

英文题名：Phenotypic Variation in Natural Populations of Betula alnoides in Guangxi, China

作者：曾杰[1] 郑海水[1] 甘四明[1] 白嘉雨[1]

第一作者：曾杰

机构：[1]中国林业科学研究院热带林业研究所

年份：2005

卷号：41

期号：2

起止页码：59-65

中文期刊名：林业科学

外文期刊名：Scientia Silvae Sinicae

收录：CSTPCD;;Scopus;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：表型变异;天然居群;西南桦;Mahalanobis距离;广西壮族自治区;表型性状;性状指标;方差分析;相关分析;地理格局;气候因子;聚类分析;居群分化;地理变异;地理距离;改良工作;研究结果;科学依据;利用对策;育种策略;分布区;系数和

外文关键词：Betual alnoides; natural population; phenotypic variation; geographic variation pattern; population differentiation

分类号：S791.18;S792.159

摘要：以广西壮族自治区的西南桦天然分布区为研究对象 ,调查了 11个居群 190个单株的 12个表型性状指标 ,运用变异系数和巢式方差分析研究了居群间和居群内的表型变异 ;应用相关分析揭示了表型性状间及其与地理、气候因子间的相关性以及表型变异的地理格局 ;并且运用聚类分析进行了居群分类。结果表明 ,西南桦天然居群内的变异远大于居群间的变异 ,居群分化较小 ;侧脉数、叶片基部至最宽处距离与经度、纬度显著相关 ,叶片长与经度相关显著 ,种翅宽与海拔显著相关 ,存在较明显的地理变异趋势。而表型性状的Mahalanobis距离与地理距离间相关不显著。研究结果为西南桦的遗传改良工作奠定了基础 。
phenotypic traits were investigated for 190 individuals in 11 natural populations of Betula alnoides from Guangxi,China using nested variance analysis,correlation analysis and clustering analysis.etc.The variation within populations was much greater than that among populations,which inferred that little differentiation was observed among populations.Among 12 phenotypic traits,number of lateral veins,height of maximum width were remarkably correlated to both longitude and latitude,length of leaves to longitude,and width of seed wing to altitude.There was no significant relationship between geographic distances and mahalanobis distances calculated from all phenotypic traits.These findings will lay a foundation for genetic improvement in B.alnoides, and provide scientific basis for working out breeding strategy in this species and for contermeasures of natural forest sustained utilization.