摘要
93个尾叶桉无性系试验多性状遗传分析和选择的研究结果表明:林分生长、形质性状在无性系间均呈显著差异。共有45个无性系的材积生长超过总体材积平均值。7个性状的表型变异系数值在8.46%～52.85%之间,遗传变异系数值在3.10%～39.33%之间,各性状无性系重复力为72.91%～93.43%,单株重复力为11.86%～41.58%,呈中等至强度遗传。除高径比外,生长性状间存在紧密的正相关关系,干形存在相对的独立性。构建了多性状选择指数式,以大于选择指数平均值加上一个选择指数标准差为标准,选出18个优良无性系,入选率为19.355%。
The results of variance and genetic analysis including 93 E.urophylla clones showed that there were high significant differences in growth and form quality characters among clones. Individual tree volume of 45 clones were more than that of all clones means. All characters showed middle to strong genetic coherence. There were close positive correlations among growth characters except ratio of height to DBH. Stem form showed certain independence. The equation was established by using select index method of multi-characters. Meanwhile,18 clones were selected with the rate of 19.355% by using the criterion which was larger than the total selection index average plus a selectoin index standard deviation.
出处
《桉树科技》
2010年第1期1-8,共8页
Eucalypt Science & Technology
基金
国家"十一五"科技支撑专题"高产优质桉树速生材树种新品种选育"(2006BAD01A1504)
关键词
尾叶桉
无性系
遗传分析
选择指数
Eucalyptus urophylla
clones
genetic analysis
selection index
