Article abstract

Journal of Agricultural and Crop Research

Research Article | Published March 2021 | Volume 9, Issue 3. pp. 72-79.

doi: https://doi.org/10.33495/jacr_v9i3.21.117

 

SNPs that identify alleles with highest effect on grain mold ratings after inoculation with Alternaria alternata or with a mixture of Alternaria alternata, Fusarium thapsinum and Curvularia lunata

 



 

 

Louis K. Prom1*

Ezekiel Ahn2

Clint Magill2

 

Email Author
Tel: (+01) 979 260 9393.

 

1. USDA-ARS Southern Plains Agricultural Research Center, College Station, TX, USA.

2. Department of Plant Pathology and Microbiology, Texas A&M University, College Station, TX, USA.


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Citation: Prom LK, Ahn E, Magill C (2021). SNPs that identify alleles with highest effect on grain mold ratings after inoculation with Alternaria alternata or with a mixture of Alternaria alternata, Fusarium thapsinum and Curvularia lunata. J. Agric. Crop Res. 9(3):72-79. doi: 10.33495/jacr_v9i3.21.117.

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 Abstract 


In a recent study, sorghum association panel (SAP) lines were evaluated for grain mold resistance against Alternaria alternata individually and co-inoculated with Fusarium thapsinum, and Curvularia lunata. Several accessions were found to be resistant to both treatments. A genome-wide association study based strictly on mold rating scores for each SAP line revealed a number of SNPs closely linked or in genes known to play roles in host defense. In that analysis mold ratings were used directly, without accounting for how much change was made in each rating versus water treated controls. Here, the same datasets for mold scores and more that 79,000 SNP alleles were used, but the untreated control values for each cultivar were subtracted from the treated sample ratings. The new dataset is thus designed to identify host genes that had the most impact in changing the mold rating over background. Our goal was to determine if the same genes would be identified, and if not, did the functions of the new genes also make them candidates for roles in mold resistance. As before, when the newly found top-scoring SNPs were mapped to the published sorghum genome, the nearest annotated gene has precedence for a role in host defense.

Keywords  Sorghum grain mold   fungal species   Alternaria alternata   Fusarium thapsinum  

 Curvularia lunata   GWAS   SNP   QTL  

 

 

Copyright © 2021 Author(s) retain the copyright of this article.or(s) retain the copyright of this article.

This article is published under the terms of the Creative Commons Attribution License 4.0

 

 

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