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作 者 ：宁坤1；刘笑平2；林永红2；赵曦阳1；刘桂丰1；杨洋1；宋鑫1；李慧玉1*

期 刊 ：植物研究 2015年 35卷 1期 页码：39-46

关键词：白桦；子代变异；纸浆材；种质选择；

Keywords:Betula platyphylla, progeny variation, pulpwood, germplasm selection,

摘 要 ：以帽儿山实验林场6年生49个家系白桦子代测定林为材料，对其生长和材性进行测定，采用生长和材性连续选择及指数选择法，进行白桦优良家系筛选。结果表明：白桦49个家系间的树高、胸径、单株材积和保存率均存在极显著的差异，利用4个生长性状的多重比较初次选择出5个优良家系及3个亚优良家系；对这8个优良家系的材性性状进行方差分析，8个优良家系间纤维长度差异不显著，基本密度、木质素含量和综纤维素含量3项指标都达到了极显著的差异水平。采用选择指数法构建指数方程，选出I₂为比较理想的多性状指数方程，并确定适合做纸浆材的家系为655、604和630。

Abstract:We studied 49 six-year Betula platyphylla progeny testing forest families to determine their growth and wood traits in Maoershan Experimental Forest, and selected the superior families of B.platyphylla by using continuous selection and index selection of growth and wood traits. There were very significant variations in height, diameter at breast height (DBH), volume per plant and preservation rate within the families. By the multiple comparison of four growth traits, we selected five superior families and three inferior superior families. By variance analysis for the wood traits of eight superior families, there were significant differences in wood basic density, content of ligin and holocellulose except fiber length. We constructed index equations using selection index and selected I₂ as the idealist multi-trait index equation, and determined the families for pulpwood production of 655, 604 and 630.

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