史密斯桉优良家系的早期选择研究  

Early Selection of Eucalyptus smithii Superior Family

作　　者：李思广[1] 张荣贵[1] 蒋云东[1] 周志忠 张国华 李涛 张泽 

机构地区：[1]云南省林业科学院,云南昆明650204 [2]富民县林业技术推广站,云南富民650400

出　　处：《云南林业科技》2002年第1期1-5,共5页Yunnan Forestry Science and Technology

摘　　要：1995年在富民县建立的史密斯桉家系试验包括了史密斯桉的 7个种源、 88个家系 ,3 4年生时的分析结果表明家系间各主要生长性状存在着显著或极显著的差异。蓄积量最高的家系是 186 81种源的 2 2号家系(2 6 980 1m3 /hm2 ) ,其蓄积量约是最差种源 186 76的 6号家系 (5 0 0 2 5m3 /hm2 )的 5倍多。同时也对家系性状的遗传参数进行了分析 ,结果表明家系各性状遗传力较高 ,家系蓄积量的遗传力为 :0 86 84 ,单株遗传力为 :0 986 3。初步评选出了适合在滇中地区生长的 2 0个史密斯桉优良家系 ,蓄积量实际增益为 32 6 9%～ 6 5 6 6 %。Family test of Eucalyptus smithii including seven provenances and eighty eight families were conducted in 1995 at Fumin county, Yunnan province At 3 4 years old, the experimental results indicated that there were significant difference of growth characters between provenances and families No 22 family of No 18681 provenance had the highest timber volume of 26 980 1m 3 /hm 2 The genetic parameters of the tested families and individuals were analyzed The timber volume hereditability of family and individual were 0 868 4 and 0 986 3 respectively Twenty superior families adaptable to the middle area of Yunan province, with the actual genetic gain of 32 69%～65 66% were selected out

关 键 词：史密斯桉 优良家系 早期选择 

分 类 号：S792.39[农业科学—林木遗传育种]