首页|Identification of blast-resistance loci through genome-wide association analysis in foxtail millet (Setaria italica (L.) Beauv.)

Identification of blast-resistance loci through genome-wide association analysis in foxtail millet (Setaria italica (L.) Beauv.)

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Blast disease caused by the fungus Magnaporthe grisea results in significant yield losses of cereal crops across the world. To date, very few regulatory genes contributing to blast resistance in grass species have been identified and the genetic basis of blast resistance in cereals remains elusive. Here, a core collection of foxtail millet (Setaria italica) containing 888 accessions was evaluated through inoculation with the blast strain HN-1 and a genome-wide association study (GWAS) was performed to detect regulators responsible for blast disease resistance in foxtail millet. The phenotypic variation of foxtail millet accessions inoculated with the blast strain HN-1 indicated that less than 1.60％ of the samples were highly resistant, 35.25％ were moderately resistant, 57.09％ were moderately susceptible, and 6.08％ were highly susceptible. The geographical pattern of blast-resistant samples revealed that a high proportion of resistant accessions were located in lower latitude regions where the foxtail millet growing season has higher rain precipitation. Using 720000 SNP markers covering the Setaria genome, GWAS showed that two genomic loci from chromosomes 2 and 9 were significantly associated with blast disease resistance in foxtail millet. Finally, eight putative genes were identified using rice blast-related transcriptomic data. The results of this work lay a foundation for the foxtail millet blast resistance biology and provide guidance for breeding practices in this promising crop species and other cereals.

foxtail milletblast resistancecore collectionGWAS

LI Zhi-jiang、JIA Guan-qing、LI Xiang-yu、LI Yi-chu、ZHI Hui、TANG Sha、MA Jin-feng、ZHANG Shuo、LI Yan-dong、SHANG Zhong-lin、DIAO Xian-min

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College of Life Sciences,Hebei Normal University,Shijiazhuang 050024,P.R.China

Institute of Crop Breeding,Heilongjiang Academy of Agricultural Sciences,Harbin 150086,P.R.China

Institute of Crop Sciences,Chinese Academy of Agricultural Sciences,Beijing 100081,P.R.China

Institute of Plant Protection,Heilongjiang Academy of Agricultural Sciences,Harbin 150086,P.R.China

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This research was supported by the National Key R&D Program of ChinaThis research was supported by the National Key R&D Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of Chinaearmarked fund for China Agriculture Research System of MOF and MARAAgricultural Science and Technology Innovation Program of the Chinese Academy of Agricultural Sciences, and the Heilongjiang

2018YFD10007062018YFD10007003187163031771807CARS-06-13.52018JJPY005

2021

10.1016/S2095-3119(20)63196-3

农业科学学报(英文)
中国农业科学院农业信息研究所

农业科学学报(英文)

CSTPCDCSCDSCI
影响因子：0.576
ISSN：2095-3119
年,卷(期)：2021.20(8)
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