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Analysis of rice blast resistance genes by QTL mapping

机译:利用QTL定位分析稻瘟病抗性基因

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Resistance to rice blast pathogen mostly shows a quantitative trait controlled by several minor genes. Its complexity and the mutable characteristic of rice blast isolates both hinder the development of the blast resistance research. The article heretried to explore the resistance gene distribution on rice chromosomes and the way of function. Totally 124 QTLs have been identified against 20 isolates using Cartographer software with a ZYQ8/JX17 DH population, which separately are at 100 loci of 72 marker intervals on 12 rice chromosomes. Of them. 16 QTLs were determined by the isolate HB-97-36-1. 82 QTLs (66.13%) are from the resistant parent alleles. ZYQ8, while 42 QTLs (33.87%) are from the susceptible parent alleles, JX17. In comparison of theirpositions on chromosome, most QTLs are clustered together and distributed nearby the major genes especially the regions on chromosomes 1, 2, 8, 10 and 12. Each QTL could account for the resistance variation between 3.52%- 68.64%. And, a positional QTL might display the resistance to several different isolates with different contributions.
机译:对稻瘟病病原体的抗性大多表现出由几个次要基因控制的定量性状。稻瘟病分离株的复杂性和易变性都阻碍了稻瘟病抗性研究的发展。本文试图探讨抗性基因在水稻染色体上的分布及其功能方式。使用带有ZYQ8 / JX17 DH群体的Cartographer软件,已针对20个分离株鉴定出总共124个QTL,这些群体分别位于12个水稻染色体上的72个标记间隔的100个基因座上。其中。通过分离株HB-97-36-1确定了16个QTL。 82个QTL(66.13%)来自抗性亲本等位基因。 ZYQ8,而42个QTL(33.87%)来自易感亲本等位基因JX17。通过比较它们在染色体上的位置,大多数QTL聚集在一起并分布在主要基因附近,特别是在1、2、8、10和12号染色体上的区域附近。每个QTL可以解释在3.52%至68.64%之间的抗性变异。并且,位置QTL可能显示出对具有不同贡献的几种不同分离株的抗性。

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