摘要
以角果差异显著的白菜自交不亲和系(P1)和白菜型油菜自交系(P2)为亲本及杂交获得的4个基本世代(P1、P2、F1、F2)为材料,应用植物数量性状主基因+多基因混合遗传模型对其角果相关性状进行遗传分析。结果表明,芸薹种作物的角果长度(SPL)性状及喙长(SBL)性状均受加性-显性-上位性多基因控制(C-0模型),多基因遗传率分别为83.16%和68.67%;角果宽度(SPW)性状受2对加性-显性-上位性主基因+加性-显性-上位性多基因控制(E-0模型),其主基因遗传率为20.40%,多基因遗传率为78.34%。角果相关各性状均以多基因遗传为主,角果宽度性状受环境因素影响较小,为1.26%;角果长度、喙长受环境因素影响较大,分别达16.08%和25.36%。针对芸薹种作物角果性状的改良要以多基因为主,并注意环境条件影响。
Two parents of Brassica campestris （ P1, P2 ） with significant difference in silique traits, and their corresponding four basic generations （ P1, P2, F1, and F2 ） were used to analyze the inheritance of silique correlated traits by applying mixed major-gene plus poly-gene inheritance model. The results indicated that both the silique length （SPL） and the seed beak length （SBL） were controlled by poly-gene with additive-dominant-epistatic effects （C-0 model）, and the heritabilities of poly-gene for SPL and SBL were 83.16% and 68.67% , respectively. The silique width （SPW） was controlled by two major genes with additive-dominant-epistatic effects plus poly-gene with additive-dominant-epistatic effects （E-0 model）, and the heritability of major genes was 20.40% ,while poly-genes was 78.34%. The silique width （SPW） was less affected by environmental factors,conversely to the SPL and SBL, which influenced by environmental factors were 16.08% and 25.36% ,respectively. This implied that in the genetic improvement of silique correlated trait poly-gene was a main factor and environment factors should also be mentioned.
出处
《植物遗传资源学报》
CAS
CSCD
北大核心
2013年第3期547-552,共6页
Journal of Plant Genetic Resources
基金
国家自然科学基金(30900981)
关键词
芸薹种
遗传
角果
主基因+多基因
Brassica campestris
inheritance
silique
major-gene plus poly-gene
