【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 %。更多还原

【Abstract】 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更多还原