西北林学院学报2017，Vol.32Issue(2)：117-122,129,7.DOI:10.3969/j.issn.1001-7461.2017.02.20
幼龄期南方红豆杉生长和形质性状的优树家系遗传变异
Variation of the Family Genetics of the Plus Trees Taxus wallichina var.mairei at Young Stage
摘要
Abstract
In order to cultivate precious timber trees,in test plots of Mingxi of Fujian Province,10 growth and stem form quality characteristics of 3-year-old seedlings of 46 plus tree families of Taxus wallichina var.mairei from 9 provenances of 6 provinces were determined and their variance analyses were carried out,the correlations among 4 growth characteristics 6 stem form quality characteristics were analyzed,the genetic parameters were calculated,and selective breeding strategies were proposed.The results showed that change ranges of the coefficient of variation of those growth and stem form quality characteristics of 3-year-old seedlings from different families were 9.34％-31.96 ％.The coefficient of variation among individuals were 27.08％-96.19％,indicating that families and individuals existed significant variation.The differences in those 10 growth and stem form quality characteristics are extremely significant among different families,and there were inconsistency among trais performance in the same family.There were extremely and significantly positive correlation among the parameters such as height,ground diameter,crown width and length of shoot in current year.There were significantly negative correlation between height,crown width,length of shoot in current year to the forking rate,between ground diameter to height to diameter ratio,between branch density to height to diameter ratio.There were extremely significantly positive correlation between height to diameter ratio to height,between the number of branches to height,crown width,length of shoot in current year,between height,ground diameter,crown width and length of shoot in current year to maximum length of lateral branch.But there was not significant correlation between the maximum lateral collateral diameter to height,ground diameter,crown width,length of shoot in current year.there were extremely significantly positive correlation among 1 to 3 year old tree height and ground diameter.Change ranges of the family broad heritability of those growth and stem form quality characteristics were 0.502 7-0.857 0,those individual heritability were 0.197 3-0.798 8.The reasonable selective breeding strategy of T.wallichina var.mairei trees was based on excellent families selection by using comprehensive series characteristics performance method,and by focusing on combination selection of excellent families and plus trees.关键词
南方红豆杉/优树/性状相关性/遗传变异/育种策略Key words
Taxus wallichina var.mairei/plus tree/character correlation/genetic variation/selective breeding strategy分类
农业科技引用本文复制引用
欧建德,罗宁,吴志庄..幼龄期南方红豆杉生长和形质性状的优树家系遗传变异[J].西北林学院学报,2017,32(2):117-122,129,7.基金项目
中央财政林业科技推广示范资金项目“观赏型南方红豆杉培育技术推广与示范”(闽[2015]TG05号). （闽[2015]TG05号）
