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  • 段韫丹,邱杨,汪精磊,等.萝卜不同抗源对黑腐病抗性的遗传分析[J].植物遗传资源学报,2015,16(1):1-6.    [点击复制]
  • duanyundan,et al.Genetic analysis on the resistance of different radish germplasm to black rot[J].植物遗传资源学报,2015,16(1):1-6.   [点击复制]
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萝卜不同抗源对黑腐病抗性的遗传分析
段韫丹, 邱杨, 汪精磊, 王海平, 张晓辉, 沈镝, 宋江萍, 李锡香
0
(中国农业科学院蔬菜花卉研究所)
摘要:
摘要:不同抗病基因的挖掘是作物持久抗性遗传改良的基础。本研究利用2份萝卜(Raphanus sativus L.)抗黑腐病(Xanthamonas campestris pv. campestris)材料(KB10Q-22、KB10Q-24)和1份感病材料(KB10Q-33)构建了2个F2群体,采用苗期剪叶 喷雾法接种黑腐病菌Xcc8004进行抗病性鉴定。应用P1、P2、F1、F2 四世代的数量性状主基因 多基因混合遗传分析方法,研究了萝卜两抗源抗黑腐病的遗传规律,结果表明2份材料的遗传规律不同。以KB10Q-22为母本的F1植株表现为抗病,其遗传模型为E_0模型,即2对加性-显性-上位性主基因 加性-显性-上位性多基因模型;而以KB10Q-24为母本的F1植株表现为感病,其遗传模型为D_0模型,即1对加性-显性主基因 加性-显性-上位性多基因模型。两群体主基因遗传率分别为87.73%和55.64%,抗性遗传以主基因为主。
关键词:  萝卜  抗黑腐病  主基因 多基因  遗传分析
DOI:
投稿时间:2014-03-11修订日期:2014-05-27
基金项目:
Genetic analysis on the resistance of different radish germplasm to black rot
duanyundan
(Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences)
Abstract:
Abstract: Mining different resistant genes is the basis for the genetic improvement of crops durable resistance. Two radish (Raphanus sativus L.) inbred lines resistant to black rot (Xanthamonas campestris pv. campestris) (KB10Q-22, KB10Q-24) and one susceptible inbred line (KB10Q-33) were used to construct F2 populations. Black rot pathogen Xcc8004 were used to inoculate seedlings by leaf-cutting spray method to identify the disease-resistance. The genetic characteristics of resistance to black rot were studied with a mixed model of major genes plus poly-gene using P1, P2, F1, F2 populations. The results showed that the inheritance of the resistance of the above two resistant lines to black rot was different. The plants of F1 generation from KB10Q-22 expressed resistant. Its genetic model was mixed two major genes with additive-dominance-epistatic effects plus poly genes with additive-dominance-epistatic effects ( E_0 model) , while the plants of F1 generation from KB10Q-24 expressed susceptible , and its genetic model was mixed one major gene with additive-dominance effects plus poly genes with additive-dominance-epistatic effects (D_0 model). Major gene heritability for the two crosses were 87.73% and 55.64%, respectively. The heritability was mainly dominated by major genes.
Key words:  Radish  Resistance to black rot  Major gene poly gene  Genetic analysis

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