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白菜抽薹相关性状遗传分析
引用本文:王玉刚 尹乐 沈宝宇 古君伶 张磊 张磊 纪小红 冯辉. 白菜抽薹相关性状遗传分析[J]. 中国农学通报, 2013, 29(4): 76-82. DOI: 10.11924/j.issn.1000-6850.2012-2534
作者姓名:王玉刚 尹乐 沈宝宇 古君伶 张磊 张磊 纪小红 冯辉
作者单位:1. 沈阳农业大学园艺学院/辽宁省十字花科蔬菜遗传育种重点实验室,沈阳,110866
2. 辽宁省经济作物研究所,辽宁辽阳,111000
基金项目:国家自然科学基金资助项目“大白菜晚抽薹基因精细定位及相关性状QTL分析”(30900981);教育部留学归国人员科研启动基金项目“大白菜晚抽薹性状的QTL分析及主效QTL近等基因系快速构建”(2010-1561)
摘    要:研究与白菜抽薹相关性状的遗传特性,为白菜类作物晚抽薹育种应用提供理论依据。试验以抽薹指数、开花时间和薹长5 cm时间分别作为抽薹早晚的评价标准,应用植物数量性状主基因+多基因混合遗传模型,对晚抽薹大白菜高代自交不亲和系(P1)和易抽薹欧洲白菜型油菜自交系(P2)及杂交所获得的F1、B1、B2和F2各世代群体进行联合遗传分析。结果表明,抽薹指数性状和薹长5 cm时间性状均受2对加性-显性-上位性主基因控制(B-1模型),开花时间性状受1对加性-显性主基因+加性-显性-上位性多基因控制(D模型)。与抽薹相关的3个性状各分离世代(B1、B2、F2)均未检测到多基因遗传,其主基因遗传率分别为抽薹指数96.22%(B1)、93.33%(B2)、93.55%(F2);开花时间70.68%(B1)、70.68%(B2)、70.64% (F2);薹长5 cm时间79.44%(B1)、79.55%(B2)、79.38%(F2),环境条件对白菜抽薹性状影响较大。由此可知,对白菜抽薹性状的遗传改良应以主基因为主,适宜在早期世代进行选择并注意环境条件影响。

关 键 词:长沙市  长沙市  
收稿时间:2012-07-18
修稿时间:2012-08-03

Inheritance Analysis of Bolting Correlated Traits Using Mixed Major Gene Plus Polygene Model in Brassica rapa
Ji Xiaohong , Yin Le , Shen Baoyu , Zhang Lei , Wang Yugang , Feng Hui. Inheritance Analysis of Bolting Correlated Traits Using Mixed Major Gene Plus Polygene Model in Brassica rapa[J]. Chinese Agricultural Science Bulletin, 2013, 29(4): 76-82. DOI: 10.11924/j.issn.1000-6850.2012-2534
Authors:Ji Xiaohong    Yin Le    Shen Baoyu    Zhang Lei    Wang Yugang    Feng Hui
Affiliation:1 (1 College of Horticulture,Shenyang Agricultural University /Liaoning Provincial Key Laboratory of Genetics and Breeding of Cruciferous Vegetable Crops,Shenyang 110866;2 Liaoning Cash Crop Institute,Liaoyang Liaoning 111000)
Abstract:

The mixed major-gene plus polygene inheritance model was used to analyze the inheritance of bolting correlated traits in Brassica rapa, which will provide useful information for breeding a late bolting or bolting-resistant cultivars of Brassica rapa. Three phenotypic measurements, bolting index, flowering time, days to 5 cm elongated stalk, respectively, were used for inheritance analysis with six generations of P1 (bolting resistant inbreed line) and P2 (vernalization independent type) and their F1, B1, B2 and F2. The results showed that the two traits, bolting index and days to 5 cm elongated stalk, both were controlled by two major genes with additive-dominance-epistatic effects (B-1 model) in hybrid. The flowering time was controlled by one major gene with additive-dominance effects plus poly-genes with additive-dominance-epistatic effects (D model). The heritability of the major genes in B1, B2 and F2 were 96.22%, 93.33%, 93.55% for bolting index, 70.68%, 70.68%, 70.64% for flowering time, 79.44%, 79.55%, 79.38% for days to 5-cm elongated stalk, respectively. But no polygene heritability was checked in B1, B2 and F2 segregating generations. It indicated that the bolting trait in Brassica rapa was controlled by one or tow major genes. This implied that in the genetic improvement for bolting resistant trait major gene is a main factor. It is fit for early selection and environment factor should also be mentioned.

Keywords:

inheritance model

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