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首页> 外文期刊>Journal of genetics >Different responses of soybean cyst nematode resistance between two RIL populations derived from Peking ?— 7605 under two ecological sites
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Different responses of soybean cyst nematode resistance between two RIL populations derived from Peking ?— 7605 under two ecological sites

机译：在两个生态位点下，来自北京？-7605的两个RIL种群之间的大豆孢囊线虫抗性的不同响应

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The soybean cyst nematode (SCN), Heterodera glycines Ichinohe, is a plant-parasitic nematode that feeds on the roots of soybean and most economically devastating pathogen of soybean (Glycine max (L.) Merr.) worldwide. Host plant resistance is the most effective control method. To understand SCN resistance in different environments, two recombinant-inbred lines (RILs) populations NJ(RN)P7 (217 F2:8:11 lines) and JN(RN)P7 (248 F2:7:9 lines) were developed from the cross of the cultivars Peking ?— 7605 in Nanjing and Jinan, respectively, and examined in this study. Peking is resistant to SCN race 1 (HG types 2.5.7), while 7605 is highly susceptible. Chi-square test of frequency distribution of familiesa€? female index (FI) showed that resistance to SCN was significantly different between NJ(RN)P7 and JN(RN)P7 populations. Three recessive genes conditioned the inheritance of resistance to SCN race 1 in both populations, but significant difference was detected for the mean of FI on two populations (DM= a?’16.68, P 0.01). This indicated that natural selection may affect resistance to SCN. By analysing the variation of phenotype, the genetic structure of the two populations was determined to be different. The inheritance and variation of resistance were confirmed by simple sequence repeat (SSR) markers. For the two populations, 10 SSR markers showed polymorphism of resistant and susceptible DNA bulks. Some markers associated with the resistance of SCN races 1, 2, 3 and 5, and two markers, Satt163 and Satt309, reportedly related to rgh1 were detected both in NJ(RN)P7 and JN(RN)P7 populations. The results support the view that a disease acts as a selective force on plant resistance characteristics, which may alter the relative fitness of resistance alleles.
机译：大豆孢囊线虫（SCN）杂种甘氨酸Ichinohe是一种植物寄生线虫，以大豆的根和全世界最具经济破坏力的大豆病原体（Glycine max（L.）Merr。）为食。寄主植物抗性是最有效的控制方法。为了了解在不同环境中的SCN抗性，从该种群开发了两个重组近交系（RIL）种群NJ（RN）P7（217 F2：8：11系）和JN（RN）P7（248 F2：7：9系）。在本研究中，分别对南京和济南的北京7605品种进行了杂交。北京对SCN种族1（HG类型2.5.7）具有抵抗力，而7605非常易感。家庭频率分布的卡方检验女性指数（FI）显示，NJ（RN）P7和JN（RN）P7人群对SCN的抗性明显不同。在两个种群中，三个隐性基因限制了对SCN第1种抗性的遗传，但是在两个种群中FI的均值存在显着差异（DM = a？16.68，P <0.01）。这表明自然选择可能会影响对SCN的抗性。通过分析表型的变异，确定两个群体的遗传结构不同。抗性的遗传和变异通过简单序列重复（SSR）标记确认。对于这两个种群，有10个SSR标记显示抗性和易感DNA本体的多态性。在NJ（RN）P7和JN（RN）P7人群中均检测到一些与SCN第1、2、3和5种SCN抗性相关的标志物，以及两个与rgh1相关的标志物Satt163和Satt309。结果支持这样一种观点，即疾病对植物抗性特性起选择性作用，这可能会改变抗性等位基因的相对适应性。

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