摘要
对马尾松一代无性系种子园投产后连续６ａ不同产地和产地内无性系的球果产量进行了统计分析。研究表明，产地和无性系是球果产量的重要变异来源，但产地内无性系的方差分量是产地的５倍；产地和无性系平均遗传力都较高，分别为０．７３～０．７９和０．７０～０．８５。种子园在不同年份间的球果产量变化很大，在群体总变异中所占的方差分量比例最大（材料Ⅰ为３７．０４％，材料Ⅱ为４８．９６％），具有明显的大小年。种子园内无性系对球果总产量的贡献率因组成的无性系不同而有较大差异，年份间也有差异。由不同产地无性系组成的种子园中球果产量的基因型×年份互作效应极为显著，方差分量占总变异的１４．１７％，应予以重视。最后对该种子园无性系按产量高低和稳定性分成五种类型。
This paper deals with the genetic variation between different seed sources and between clones within the seed sources for cone yields for 6 years successively after the firstgeneration clonal seed orchard of masson pine putting into production.The results show that the differences between seed sources and clones are important variation sources,and the latters′ effect surpasses those of the former ones.The heritabilities based on seed source and clone mean are found to be high.There exists great fluctuation of cone production between different years(i.e.possessing marked bumper and lean year).37%～49% of the total variation can be attributed to year effect.The contributions of clones to total cone production are related to the genetic composition of clonal seed orchards and production years. In the seed orchards composed of clones from different seed sources,the significant genotype by year interaction of cone yield is found and should be payed attention to.If clones of seed orchards are from the same seed sources, the genotype by year interaction is smaller and meaningless in practice. In order to manage the seed orchards well,all clones could be divided into 5 types,according to the cone outputs and genetic stabilities.
出处
《林业科学研究》
CSCD
北大核心
1998年第3期277-284,共8页
Forest Research
基金
浙江省"八五"攻关项目子专题
关键词
马尾松
无性系种子园
球果产量
遗传变异
masson pine clonal seed orchard cone output genetic variation
