Mapping of Rice Blast Resistance Gene Based on BSA-seq

doi:10.3969/j.issn.1006-8082.2024.06.006

Abstract

Abstract:

In order to explore the genetic loci of blast resistance-related traits in rice, the recombinant inbred lines of rice 2013ZJP-3×Jingning 11 hybridization were used as experimental materials. The resistance to leaf blast and neck blast was identified by artificial inoculation and natural induction during 2022—2023, and QTL was analyzed by BSA-seq method. Phenotypic identification showed that the resistance of F₁₁ population to rice blast was distributed continuously, and most materials showed moderate resistance, preferring to the resistant parent jingning 11. 19 resistant lines and 17 sensitive lines were screened to construct the resistant pool. After sequencing, mutation detection and association analysis, a total of 2 regions to blast resistance were obtained, mainly distributed on chromosome 5 and 7, with a total length of 1.45 Mb. 94 different genes, including 12 frame shift mutations, 82 non-synonymous mutations, 9 frame shift and non-synonymous mutations, were screened out. LOC_Os05g10630, LOC_Os05g10650 and LOC_Os07g08960 genes were predicted to have the greatest correlation with blast resistance in rice.

Key words: rice, blast resistance, BSA-seq, gene mapping

摘要：

为挖掘水稻稻瘟病抗性相关性状基因位点，于2022—2023年以水稻2013ZJP-3×京宁11杂交得到的重组自交系群体为试验材料，采用人工接种和自然诱发相结合的方法鉴定其对叶瘟、穗颈瘟的抗性，并采用BSA-seq法进行QTL定位分析。表型鉴定结果表明，F₁₁ 群体的稻瘟病抗性呈连续性分布，且大部分材料表现为中抗，偏向于抗病亲本京宁11。筛选出19个抗性株系和17个感性株系材料，构建了抗感池。经过测序、变异检测和关联分析，共得到2个与稻瘟病抗性相关的区间，主要分布在5号和7号染色体上，区间总长度为1.45 Mb，共筛选出94个差异基因，其中，移码突变基因12个，非同义突变基因82个，移码和非同义突变基因9个。最终预测，基因LOC_Os05g10630、LOC_Os05g10650和LOC_Os07g08960与水稻稻瘟病抗性的相关性较大。

关键词: 水稻, 稻瘟病, BSA-seq, 基因定位

CLC Number:

CHEN Li, SUN Jianchang, WANG Xin. Mapping of Rice Blast Resistance Gene Based on BSA-seq[J]. China Rice, 2024, 30(6): 35-41.

陈丽, 孙建昌, 王昕. 基于BSA-seq法的水稻稻瘟病抗性基因定位[J]. 中国稻米, 2024, 30(6): 35-41.

Figures/Tables 8

References 38

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