马尾松种子园优良家系生长性状选择

对广西3个马尾松种子园无性系在多个地点进行多年度重复的半同胞子代测定.自1987年以来,总共测定444个家系(不含重复测定).方差分析结果表明,各家系间存在着显著差异.根据遗传稳定性和材积生长快慢,采用性状表现水平分析法,评选出适合在广西普遍推广的广谱性优良家系64个,局部推广的局部性优良家系48个,需淘汰的家系83个;选择出的最优家系在11年生子代林中,材积生长量比对照大64.71%-94.51%.用子代林数据估算马尾松各性状的家系遗传力,树高遗传力为0.306-0.724,胸径为0.174-0.686,单株材积为0.286-0.677.

Selection of superior families in seed orchards of Masson pine

The analysis of variance was adopted to study on the genetic variation of half-sib progeny testing of the clones from the three masson pine seed orchards in Guangxi province.444 families in total had been tested since 1987(not include the duplicated).The(results) showed that there were very significant differences among families in growth traits.According to the stability of inheritance and growth of volume,performance level ananlysis was used.64 superior families that could popularize in Guangxi were selected,48 superior families that could popularize in some site were selected,83 inferior families needed to be eliminated from the seed orchards.The best family was selected at 11 years old,the average growth of the individual volume was 64.71%-94.51% more than the checks respectively.To use the data from the progeny to estimate the heritability of growth traits,the heritability of height was 0.306-0.724,the heritability of DBH was 0.174-0.686,the heritability of individual volume was 0.286-0.677.