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Exploiting genomic tools for genetic dissection and improving the resistance to Fusarium stalk rot in tropical maize

文献类型： 外文期刊

作者： Song, Junqiao 1 ; Liu, Yubo 2 ; Guo, Rui 2 ; Pacheco, Angela 2 ; Munoz-Zavala, Carlos 2 ; Song, Wei 2 ; Wang, Hui 2 ; Cao, Shiliang 2 ; Hu, Guanghui 2 ; Zheng, Hongjian 4 ; Dhliwayo, Thanda 2 ; San Vicente, Felix 2 ; Prasanna, Boddupalli M. 7 ; Wang, Chunping 1 ; Zhang, Xuecai 2 ;

作者机构： 1.Henan Univ Sci & Technol, Luoyang 471000, Henan, Peoples R China

2.Int Maize & Wheat Improvement Ctr CIMMYT, Texcoco 56237, Mexico

3.Anyang Acad Agr Sci, Anyang 455000, Henan, Peoples R China

4.Shanghai Acad Agr Sci, Crop Breeding & Cultivat Res Inst, CIMMYT China Specialty Maize Res Ctr, Shanghai 200063, Peoples R China

5.Hebei Acad Agr & Forestry Sci, Inst Cereal & Oil Crops, Shijiazhuang 050035, Hebei, Peoples R China

6.Heilongjiang Acad Agr Sci, Inst Maize Res, Harbin 150070, Heilongjiang, Peoples R China

7.Int Maize & Wheat Improvement Ctr CIMMYT, POB 1041,Village Market, Nairobi 00621, Kenya

8.Chinese Acad Agr Sci CAAS, Inst Crop Sci, CIMMYT, China Off,12 Zhongguancun South St, Beijing 100081, Peoples R China

9.CAAS, Nanfan Res Inst, Sanya 572024, Hainan, Peoples R China

期刊名称：THEORETICAL AND APPLIED GENETICS （ 影响因子：5.4； 五年影响因子：5.7 ）

ISSN： 0040-5752

年卷期： 2024 年 137 卷 5 期

页码：

收录情况： SCI

摘要： Key message A stable genomic region conferring FSR resistance at similar to 250 Mb on chromosome 1 was identified by GWAS. Genomic prediction has the potential to improve FSR resistance. Fusarium stalk rot (FSR) is a global destructive disease in maize; the efficiency of phenotypic selection for improving FSR resistance was low. Novel genomic tools of genome-wide association study (GWAS) and genomic prediction (GP) provide an opportunity for genetic dissection and improving FSR resistance. In this study, GWAS and GP analyses were performed on 562 tropical maize inbred lines consisting of two populations. In total, 15 SNPs significantly associated with FSR resistance were identified across two populations and the combinedPOP consisting of all 562 inbred lines, with the P-values ranging from 1.99 x 10(-7) to 8.27 x 10(-13), and the phenotypic variance explained (PVE) values ranging from 0.94 to 8.30%. The genetic effects of the 15 favorable alleles ranged from -4.29 to -14.21% of the FSR severity. One stable genomic region at similar to 250 Mb on chromosome 1 was detected across all populations, and the PVE values of the SNPs detected in this region ranged from 2.16 to 5.18%. Prediction accuracies of FSR severity estimated with the genome-wide SNPs were moderate and ranged from 0.29 to 0.51. By incorporating genotype-by-environment interaction, prediction accuracies were improved between 0.36 and 0.55 in different breeding scenarios. Considering both the genome coverage and the threshold of the P-value of SNPs to select a subset of molecular markers further improved the prediction accuracies. These findings extend the knowledge of exploiting genomic tools for genetic dissection and improving FSR resistance in tropical maize.

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