The Resistance Investigation and Mapping Analysis of Fusarium Crown Rot for Wheat Accessions
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1.College of Agronomy, Henan Agricultural University/State Key Laboratory of Wheat and Maize Crop Science, Zhengzhou 450046;2.Nanyang Academy of Sciences, Nanyang 473000, Henan

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Foundation projects: Henan Major Science and Technology Project (201100110100);National Key Research and Development Program (2019YFE0118300); Key Scientific and Technology Projects of Henan Province(222102520002); China Postdoctoral Science Foundation(2022M711066)

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    Abstract:

    By applying the millet grains as pathogen medium, we inoculated the 163 wheat germplasm accessions which widely cultivated currently. No immune or highly resistant wheat accessions were identified, while the resistance variations estimated by disease index (DI) were found following a normal distribution 13.28-83.33 in greenhouse and 10.27-73.89 in field, respectively. The correlation coefficient, based on the phenotype collected from greenhouse seedling assay and field trials was 0.79, supporting a high correlation on resistance at the seedling and adult stages. Furthermore, the genome-wide association study (GWAS) found significant SNPs distributed on all chromosomes of wheat, with enrichment on chromosome 2A with an interval from 725 Mb to 763 Mb. This was in keeping with the results of the bulked segregant analysis (BSA), which revealed significant SNPs distributed from 730 Mb to 750 Mb on chromosome 2A. GWAS and BSA indicated a significant resistance locus, which resided from 730 Mb to 750 Mb on chromosome 2A and associated with fusarium crown rot (FCR) infection. This study can provide important reference for identifying resistant wheat materials and exploring FCR resistant loci in wheat.

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History
  • Received:July 18,2023
  • Revised:August 26,2023
  • Adopted:
  • Online: January 26,2024
  • Published: January 26,2024
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