福建省马尾松优树自由授粉子代及其亲本的初步评定

1980年,在福建省的7个地区47个县101个林分中,选出786株优树,采集自由授粉种子。在福建省洋口等六个林场建立子代测定林1000余亩。7年生时测量了树高等6个性状。根据树高值统计结果表明。大于遗传对照10％以上的家系有293个,占参试总数的49％,树高单株遗传力h_1~2=0.24,家系遗传力h_1~2=0.32;树高生长量的遗传分析表明,群体的变异量大于群体内个体的变异量,变异来源是多层次的。

A PRELIMINARY GENETIC GRADING ON PLUS TREES OPEN-POLLINATED PROGENIES OF MASSON PINE IN FUJIAN PROVINCE

The plus tree progenies of masson pine (Pinus massoniana Lamb.) from 101 stands of 6 regions in Fujian were grown at six territories in the Province. After seven years from seed, height was measured at each test site, while data of other multitract were additionally measured at the specific test site, within and between stand differentiations tested for each trail by analysis of variance, tree height was analyzed over all plantations. Results from genetic test are as follows.l)There are 293 families graded over CK% for height growth, which account for about 49% of the families in all tests. These promising families can be used in reestablishing seed orchards and for roguing the clonal orchards to provide data.2)These results indicate that significant genetic variation occurs between regions, between stands within regions and within stands for the seventh-year height, while the stand and region genetic variation for height appear to be much greater than variation within stands. A combination between and within stand selection could be imposed in masson pine breeding program.3) Individuals and family heritability of height growth at age 7 were estimated to be 0.24 and 0.33, respectively.The above results show that the possibility of genetic improvement through selection breeding in P. massoniana.