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Genetic-based dissection of resistance to bacterial leaf streak in rice by GWAS

文献类型： 外文期刊

作者： Zhu, Xiaoyang 1 ; Chen, Lei 2 ; Zhang, Zhanying 1 ; Li, Jinjie 1 ; Zhang, Hongliang 1 ; Li, Zichao 1 ; Pan, Yinghua 2 ; Wang, Xueqiang 2 ;

作者机构： 1.China Agr Univ, State Key Lab Agrobiotechnol, Beijing Key Lab Crop Genet Improvement, Beijing 100193, Peoples R China

2.Hainan Yazhou Bay Seed Lab, Sanya 572025, Hainan, Peoples R China

3.Guangxi Acad Agr Sci, Rice Res Inst, Guangxi Key Lab Rice Genet & Breeding, Nanning 530007, Peoples R China

4.Zhejiang Univ, Coll Agr & Biotechnol, Zhejiang Prov Key Lab Crop Genet Resources, Hangzhou 310058, Peoples R China

关键词： Genome-wide association study; Rice; Bacterial leaf streak; Haplotype analysis; Transcriptome analysis

期刊名称：BMC PLANT BIOLOGY （ 影响因子：5.3； 五年影响因子：5.9 ）

ISSN： 1471-2229

年卷期： 2023 年 23 卷 1 期

页码：

收录情况： SCI

摘要： BackgroundRice is the second-largest food crop in the world and vulnerable to bacterial leaf streak disease. A thorough comprehension of the genetic foundation of agronomic traits was essential for effective implementation of molecular marker-assisted selection.ResultsOur study aimed to evaluate the vulnerability of rice to bacterial leaf streak disease (BLS) induced by the gram-negative bacterium Xanthomonas oryzae pv. oryzicola (Xoc). In order to accomplish this, we first analyzed the population structure of 747 accessions and subsequently assessed their phenotypes 20 days after inoculation with a strain of Xoc, GX01. We conducted genome-wide association studies (GWAS) on a population of 747 rice accessions, consisting of both indica and japonica subpopulations, utilizing phenotypic data on resistance to bacterial leaf streak (RBLS) and sequence data. We identified a total of 20 QTLs associated with RBLS in our analysis. Through the integration of linkage mapping, sequence analysis, haplotype analysis, and transcriptome analysis, we were able to identify five potential candidate genes (OsRBLS1-OsRBLS5) that possess the potential to regulate RBLS in rice. In order to gain a more comprehensive understanding of the genetic mechanism behind resistance to bacterial leaf streak, we conducted tests on these genes in both the indica and japonica subpopulations, ultimately identifying superior haplotypes that suggest the potential utilization of these genes in breeding disease-resistant rice varieties.ConclusionsThe findings of our study broaden our comprehension of the genetic mechanisms underlying RBLS in rice and offer significant insights that can be applied towards genetic improvement and breeding of disease-resistant rice in rapidly evolving environmental conditions.

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