韦塔桉种源多性状综合评价及育种值的估算

Study on Integrated Selection and Estimation of the Breeding Value in Eucalyptus wetarensis Provenances

6个韦塔桉种源生长性状、形质性状的差异和遗传分析结果表明:种源间各性状的差异极显著,种源层次各性状遗传力为68 65%～93 45%,单株层次各性状遗传力为42 20%～82 63%,呈中等至强度遗传;除干形与保存率外,生长性状与形质性状均呈紧密的正相关。4 5年生时17831种源生长最优,平均单株材积达0 08970m3,比生长最劣的种源增加85 87%,17834种源形质指标最优,成活率与保存率最高。经综合评价,17834、17831和17835为较好种源。估算了6个种源的各个性状的育种值。

The variance and genetic analysis results involving 6 Eucalyptus wetarensiss provenances showed that there were highly significant differences in growth and other characteristics among provenances. The heritabilities of provenances and individuals ranged 68.65%～93.45% and 42.20%～82.63% for different characteristics studied, respectively. Growth characteristics were closely correlated with branch size (B_R) and under branch height (B_H) and crown (C_W) except stem form (S_F) and the rate of survival (S_(UR)). At an age of 4.5 year old, the mean value of individual volume (S_V) of the fastest provenance (No.17931) was 0.089 70 m^3 and 1.858 7 times of the worst provenance. The provenance (No.17834) owned the best form characteristics and survival rate. By using synthetical evaluation, three good provenances (No.17834, No.17831 and No.17835) were selected. Meanwhile, the breeding value of all provenances were also estimated.