柏木无性系种子园遗传增益及优良家系评选

Genetic gain and superior families selection from clonal seed orchards of Cupressus funebris

对15年生柏木Cupressus funebris种子园自由授粉家系子代测定林的研究表明，种子园子代树高、胸径和材积平均生长量分别比对照大13．12％，13．69％和30．85％，平均遗传增益分别为7．82％，7．69％和17．03％。采用LSR法、性状表现水平分析法、一般配合力相对效应值分析法和育种值评定法等4种方法进行优良家系评选，以材积性状作为选优指标，评选出11个优良家系，其现实增益达46．35％～108．65％，平均为64、21％，遗传增益达25．58％～59．96％，平均为35．44％。

The research was on progenies of open-pollinated families from clonal seed orchards of Cupressus funebris at age of 15. It is showed that the average growth of the height, diameter at breast height and stem volume of offspring in clonal seed orchards were 13.12%, 13.69% and 30.85 % higher than the control group respectively, and their average genetic gains were 7.82%, 7.69% and 17.03% higher than the control group respectively. Eleven superior families were selected according to their timber traits with the methods of the Least Significant Range, the trait performance analysis and the estimation of breeding value. Their real gains were between 46.35 % and 108.65% with the average value of 64.21% ; their genetic gains were between 25.58% and 59.96% with the average value of 35.44%. Good breeding benefits could be acquired from the application of the superior families in the production. [Ch, 3 tab. 22 ref. ]