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Author: search.filters.author.Suwor, PatcharapornSubject: search.filters.subject.disease resistance

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    Genetic loci associated with Fusarium wilt resistance in tomato (Solanum lycopersicum L.) discovered by genome-wide association study
    (2023-12-01)
    Thanyasiriwat, Thanwanit
    ;
    Tongyoo, Pumipat
    ;
    Saman, Prakob
    ;
    Suwor, Patcharaporn
    ;
    Sangdee, Aphidech
    Fusarium wilt (FW), caused by Fusarium oxysporum f. sp. lycopersici (Fol), has impacted global tomato production. This study aims to identify single nucleotide polymorphisms (SNPs) and candidate genes associated with FW resistance against different Fol isolates in tomato accessions using genome-wide association studies (GWAS). Ninety-four tomato accessions were evaluated for FW resistance and subjected to GWAS analysis. Broad-spectrum tomato accessions demonstrated resistance to Fol in at least two isolates, exhibiting a disease severity index (DSI) of 0%. Thirty-two SNP loci were significantly linked to the DSI of Fol isolates TFPK401, BK2269 and NP-T4, clustering on chromosome 6. Among these, 12 common significant SNPs were associated with the DSI of at least two Fol isolates, while four unique SNPs were specific to TFPK401 or NP-T4. Furthermore, candidate genes associated with disease response to Fol infection were identified within a 37.9–41 Mb region flanking the SNPs. These findings contribute to a deeper understanding of resistance mechanisms against Fol infection in tomatoes, potentially aiding the development of effective breeding strategies for Fusarium wilt resistance.
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    Genome-wide association study revealed genetic loci for resistance to fusarium wilt in tomato germplasm
    (2023-01-01)
    Kawicha, Praphat
    ;
    Tongyoo, Pumipat
    ;
    Wongpakdee, Somporn
    ;
    Rattanapolsan, Ladawan
    ;
    Duangjit, Janejira
    Tomato Fusarium wilt caused by Fusarium oxysporum f.sp. lycopersici (Fol) constrains tomato production worldwide. Three hundred forty tomato accessions were evaluated for Fusarium wilt resistance and single nucleotide polymorphisms (SNPs) associated with resistance. The disease resistance evaluation revealed that 15, 13, and 15 accessions were identified as Fusarium wilt resistant in Test 1, 2, and Mean data, respectively, with the disease severity index (DSI) ranging from 0-16.7%. A genome-wide association study (GWAS) identified SNPs associated with resistance. Eighteen common SNPs were detected in at least two tests and located on chromosomes 4, 6, 7, 9, and 12. Six unique significant SNPs were found in either Test 1 or 2, located on chromosomes 2, 4, and 7. Candidate genes associated with Fusarium wilt resistance were identi-fied. Notably, two genes encoding leucine-rich repeat-like protein and disease-resistance protein were predicted from the two unique SNPs, solDsnp10606 and solDsnp6266, respectively.