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Identification of Two Novel Peanut Genotypes Resistant to Aflatoxin Production and Their SNP Markers Associated with Resistance

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Relation http://oar.icrisat.org/11510/
https://doi.org/10.3390/toxins12030156
doi:10.3390/toxins12030156
 
Title Identification of Two Novel Peanut Genotypes Resistant to Aflatoxin Production and Their SNP Markers Associated with Resistance
 
Creator Yu, B
Jiang, H
Pandey, M K
Huang, L
Huai, D
Zhou, X
Kang, Y
Varshney, R K
Sudini, H
Ren, X
Luo, H
Liu, N
Chen, W
Guo, J
Li, W
Ding, Y
Jiang, Y
Lei, Y
Liao, B
 
Subject Groundnut
Oilseeds
Genetics and Genomics
Aflatoxins
 
Description Aflatoxin B1 (AFB1) and aflatoxin B2 (AFB2) are the most common aflatoxins produced
by Aspergillus flavus in peanuts, with high carcinogenicity and teratogenicity. Identification of DNA
markers associated with resistance to aflatoxin production is likely to o�er breeders e�cient tools
to develop resistant cultivars through molecular breeding. In this study, seeds of 99 accessions of a
Chinese peanut mini-mini core collection were investigated for their reaction to aflatoxin production
by a laboratory kernel inoculation assay. Two resistant accessions (Zh.h0551 and Zh.h2150) were
identified, with their aflatoxin content being 8.11%–18.90% of the susceptible control. The 99 peanut
accessions were also genotyped by restriction site-associated DNA sequencing (RAD-Seq) for a
genome-wide association study (GWAS). A total of 60 SNP (single nucleotide polymorphism) markers
associated with aflatoxin production were detected, and they explained 16.87%–31.70% of phenotypic
variation (PVE), with SNP02686 and SNP19994 possessing 31.70% and 28.91% PVE, respectively.
Aflatoxin contents of accessions with “AG” (existed in Zh.h0551 and Zh.h2150) and “GG” genotypes
of either SNP19994 or SNP02686 were significantly lower than that of “AA” genotypes in the mean
value of a three-year assay. The resistant accessions and molecular markers identified in this study
are likely to be helpful for deployment in aflatoxin resistance breeding in peanuts.
 
Publisher MDPI
 
Date 2020-03
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://oar.icrisat.org/11510/1/toxins-12-00156-v2.pdf
Yu, B and Jiang, H and Pandey, M K and Huang, L and Huai, D and Zhou, X and Kang, Y and Varshney, R K and Sudini, H and Ren, X and Luo, H and Liu, N and Chen, W and Guo, J and Li, W and Ding, Y and Jiang, Y and Lei, Y and Liao, B (2020) Identification of Two Novel Peanut Genotypes Resistant to Aflatoxin Production and Their SNP Markers Associated with Resistance. Toxins (TSI), 12 (156). pp. 1-16. ISSN 2072-6651