摘要
选用结缕草属植物耐盐性两极端类型材料Z105(耐盐)和Z061(敏盐)进行杂交,获得F1分离群体,通过叶片枯黄率和枝叶修剪干重降低百分率对F1群体的耐盐性进行鉴定,并应用植物数量性状主基因+多基因混合遗传模型分析方法对F1群体耐盐性进行遗传分析。结果表明:(1)盐胁迫下F1群体的叶片枯黄率和枝叶修剪干重降低百分率的变异范围均较大,叶片枯黄率的变异范围为10.00%～98.33%,枝叶修剪干重降低百分率的变异范围为1.87%～91.40%,均远远超出了双亲的范围,双亲的叶片枯黄率为35.00%和95.00%,双亲的枝叶修剪干重降低百分率为42.10%和84.59%。(2)叶片枯黄率的最适遗传模型为A-2模型,即1对主基因的加性模型,主基因的加性效应(d)为23.59,主基因遗传率(h2mg)为66.83%。枝叶修剪干重降低百分率的最适遗传模型为B-1模型,即两对主基因,加性-显性-上位性模型,在该群体中加性效应(da和db)分别为29.70和3.23,显性效应(ha和hb)分别为15.03和2.28,上位性效应(i,jab,jba,l)分别为-3.23、-2.28、11.44和-12.82,主基因遗传率(h2mg)为84.37%。
Inheritance of salt tolerance,including leaf firing percentage and reduced percentage of dry shoot clipping weight,in F1 segregating populations of Zoysia japonica from the cross of Z105（salt tolerant）and Z061（salt sensitive）was investigated by the major gene and polygene mixed genetic model.The results showed that the range of variation of leaf firing percentage and reduced percentage of dry shoot clipping weight for progenies was 10.00%~98.33% and 1.87%~91.40%,respectively.Both of them were far beyond that of their parents（35.00% and 95.00% for leaf firing percentage,42.10% and 84.59% for reduced percentage of dry shoot clipping weight）.The additive major gene model（A-2）was the most suitable model for the leaf firing percentage of Z105×Z061,The additive effect and heritability of major gene were 23.59 and 66.83%,respectively.The reduced percentage of dry shoot clipping weight of Z105×Z061 was controlled by two additive-dominance-epistasis major genes.The most suitable model is B-1 and the additive effects of two major genes were 29.70（da）and 3.23（db）,the dominance effects were 15.03（ha）and 2.28（hb）,the epistasis effects were-3.23（i）,-2.28（jab）,11.44（jba）,and-12.82（l）,and the heritability was 84.37%（h2mg）.
出处
《植物遗传资源学报》
CAS
CSCD
北大核心
2012年第5期733-738,共6页
Journal of Plant Genetic Resources
基金
国家青年科学基金项目(30800759)
江苏省科技支撑计划项目(SBE201038200)
关键词
结缕草
耐盐性
遗传分析
Zoysia japonica
Salt tolerance
Genetic analysis
作者简介
郭海林，博士，副研究员，主要研究方向为草坪草遗传育种与改良。E-mail：ghlnmg@sina．com
通讯作者：刘建秀，研究员，主要研究方向为禾草等地被植物的育种与应用。E-mail：turfunit@yahoo．com．cn
