湿地松单亲子代遗传变异分析

来自４个省份，５个引种群体的３０个优树单亲子代测定１５年结果表明：参试家系在材积、胸径和对褐斑病感病性上存在极显著的遗传差异。其中福建南屿家系群体生长快．树皮薄，侧枝数多；江苏和南京家系生长最差；江西家系平均抗褐斑病能力最强。通过多重比较，初步筛选出ＦＪＮＹ—００３．ＪＸＪＡ—０７７，ＡＨＪＸ—００１和ＪＸＪＡ—０８７等４个家系，它们材积平均生长比ＣＫ快３８．４％，平均遗传增益为１７．０６％；胸径平均遗传增益为５．１２％，感病性降低５．４３％。文中对性状间相关及其遗传参数也作了分析。

An Analysis of the Genetic Variation of One-Parent Filial Generations of Pinus elliottii

The results of the one-parent filial generation determination of 30 superior trees of 5 in-roductive populatfons from 4 provinces for 15 years dernonstrated that in the respects of volume.dbh. and susceptibility to brown spot disease the extremely significant genetic variation existed in the families in the experiment. Among them, the family population from Nanyu,Fujian grew fast,its bark was thin and its lateral branches were many:the families from Jiangsu and Nanjing grew poorest:and the families from Jiangxi were most resistant to brown spot disease on the average. By means of the multireplication comparison 4 families (i.e. FJNY 003, JXJA 007, AHJX 001,and JyJA 087)were tentatively screened. Their volume growth was 38.4% faster than that of CK and the average genetic gain was 17.06%; the average genetic gain for dbh was 5.12%; and the susceptibility reduced by 5.43%. The relationships among characters and their genetic parame-ters were also analyzed in this paper.