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Pangenome-Wide Association Study and Transcriptome Analysis Reveal a Novel QTL and Candidate Genes Controlling both Panicle and Leaf Blast Resistance in Rice

文献类型： 外文期刊

作者： Wang, Jian 1 ; Hu, Haifei 1 ; Jiang, Xianya 7 ; Zhang, Shaohong 1 ; Yang, Wu 1 ; Dong, Jingfang 1 ; Yang, Tifeng 1 ; Ma, Yamei 1 ; Zhou, Lian 1 ; Chen, Jiansong 1 ; Nie, Shuai 1 ; Liu, Chuanguang 1 ; Ning, Yuese 8 ; Zhu, Xiaoyuan 5 ; Liu, Bin 1 ; Yang, Jianyuan 5 ; Zhao, Junliang 1 ;

作者机构： 1.Guangdong Acad Agr Sci, Rice Res Inst, Guangzhou 510640, Peoples R China

2.Minist Agr & Rural Affairs, Key Lab Genet & Breeding High Qual Rice Southern C, Guangzhou 510640, Peoples R China

3.Guangdong Key Lab New Technol Rice Breeding, Guangzhou 510640, Peoples R China

4.Guangdong Rice Engn Lab, Guangzhou 510640, Peoples R China

5.Guangdong Acad Agr Sci, Plant Protect Res Inst, Guangzhou 510640, Peoples R China

6.Guangdong Prov Key Lab High Technol Plant Protect, Guangzhou 510640, Peoples R China

7.Yangjiang Inst Agr Sci, Yangjiang 529500, Peoples R China

8.Chinese Acad Agr Sci, Inst Plant Protect, State Key Lab Biol Plant Dis & Insect Pests, Beijing 100193, Peoples R China

关键词： Rice; Blast resistance; Pangenome-wide association study; Transcriptomic analysis; Candidate genes

期刊名称：RICE （ 影响因子：5.5； 五年影响因子：5.8 ）

ISSN： 1939-8425

年卷期： 2024 年 17 卷 1 期

页码：

收录情况： SCI

摘要： Cultivating rice varieties with robust blast resistance is the most effective and economical way to manage the rice blast disease. However, rice blast disease comprises leaf and panicle blast, which are different in terms of resistance mechanisms. While many blast resistant rice cultivars were bred using genes conferring resistance to only leaf or panicle blast, mining durable and effective quantitative trait loci (QTLs) for both panicle and leaf blast resistance is of paramount importance. In this study, we conducted a pangenome-wide association study (panGWAS) on 9 blast resistance related phenotypes using 414 international diverse rice accessions from an international rice panel. This approach led to the identification of 74 QTLs associated with rice blast resistance. One notable locus, qPBR1, validated in a F4:5 population and fine-mapped in a Heterogeneous Inbred Family (HIF), exhibited broad-spectrum, major and durable blast resistance throughout the growth period. Furthermore, we performed transcriptomic analysis of 3 resistant and 3 sensitive accessions at different time points after infection, revealing 3,311 differentially expressed genes (DEGs) potentially involved in blast resistance. Integration of the above results identified 6 candidate genes within the qPBR1 locus, with no significant negative effect on yield. The results of this study provide valuable germplasm resources, QTLs, blast response genes and candidate functional genes for developing rice varieties with enduring and broad-spectrum blast resistance. The qPBR1, in particular, holds significant potential for breeding new rice varieties with comprehensive and durable resistance throughout their growth period.

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