华山松高结实无性系子代苗期测定与家系选择

对所选29个高结实无性系子代苗期生长状况进行了测定,结果表明:家系间苗高和地径均表现出显著差异,具有丰富的遗传变异基础.苗高的家系遗传力为87.9%,遗传变异系数为32.6%;地径的家系遗传力为88.4%,遗传变异系数为39.0%.综合评价苗高、地径的生长状况,选择出表现优、良好的家系14个,所获苗高、地径的遗传增益分别为5.6%和8.2%,其中以N 42,N 82,N 76表现优,这3个家系的苗高遗传增益可达9.0%,地径遗传增益可达14.5%.

Sapling Test of Filial Generation and Family Selection of High Seed Yielding Clones of Pinus armandii

The growth characteristics of the filial generation for 29 high seed yielding clones of Pinus armandii at sapling stage were determined.It was showed by the results that there were significant differences in height and basal diameter growth of the saplings among families,which indicated that there was abundant base of genetic variation.It was determined that the heritability of sapling height of the tested families was 87.9%,and the genetic variation coefficient of height growth was 32.6%.The heritability of sapling basal diameter of the tested families was 88.4%,and its genetic variation coefficient was 39.0%.14 families of Pinus armandii were selected based on integrated evaluation on sapling height and basal diameter indices.The genetic gain of sapling height of the 14 families was 5.6%,and the genetic gain of basal diameter was 8.2%.The families of N 42,N 82,N 76 were the most prominent with their growth characteristics,whose genetic gain of sapling height reached 9.0%,and that of the basal diameter reached 14.5%.