QTL Mapping of Resistance to Fusarium Oxysporum F. Sp. Niveum Race 2 and Papaya Ringspot Virus in Citrullus Amarus

Overview

Journal Theor Appl Genet

Publisher Springer

Specialty Genetics

Date 2019 Dec 12

PMID 31822938

Citations 7

Authors

Sandra E Branham

W Patrick Wechter

Kai-Shu Ling

Bidisha Chanda

Laura Massey

Guangwei Zhao

Nihat Guner

Marco Bello

Eileen Kabelka

Zhangjun Fei

Amnon Levi

Affiliations

Soon will be listed here.

Abstract

A Citrullus amarus mapping population segregating for resistance to Fusarium oxysporum f. sp. niveum race 2 and Papaya ringspot virus was used to identify novel QTL, important for the improvement in watermelon disease resistance. Multiple disease screens of the USDA Citrullus spp. germplasm collection have highlighted the value of Citrullus amarus (citron melon or wild watermelon) as a resource for enhancing modern watermelon cultivars (Citrullus lanatus) with resistance to a broad range of fungal, bacterial and viral diseases of watermelon. We have generated a genetic population of C. amarus segregating for resistance to two important watermelon diseases: Fusarium wilt (caused by the fungus Fusarium oxysporum f. sp. niveum; Fon race 2) and Papaya ringspot virus-watermelon strain (PRSV-W). QTL mapping of Fon race 2 resistance identified seven significant QTLs, with the major QTL representing a novel genetic source of resistance and an opportunity for gene pyramiding. A single QTL was associated with resistance to PRSV-W, which adhered to expectations of a prior study indicating a single-gene recessive inheritance in watermelon. The resistance loci identified here provide valuable genetic resources for introgression into cultivated watermelon for the improvement in disease resistance.

Citing Articles

Comparative genomic prediction of resistance to Fusarium wilt (Fusarium oxysporum f. sp. niveum race 2) in watermelon: parametric and nonparametric approaches.

Biswas A, Wechter P, Ganaparthi V, Jarquin D, Kousik S, Branham S Theor Appl Genet. 2025; 138(1):35.

PMID: 39849180 PMC: 11757898. DOI: 10.1007/s00122-024-04813-8.

Mapping and validation of Fusarium wilt race 2 resistance QTL from Citrullus amarus line USVL246-FR2.

Ganaparthi V, Wechter P, Levi A, Branham S Theor Appl Genet. 2024; 137(4):91.

PMID: 38555543 PMC: 10982098. DOI: 10.1007/s00122-024-04595-z.

A natural substitution of a conserved amino acid in eIF4E confers resistance against multiple potyviruses.

Zhou L, Tian Y, Ren L, Yan Z, Jiang J, Shi Q Mol Plant Pathol. 2024; 25(1):e13418.

PMID: 38279849 PMC: 10777747. DOI: 10.1111/mpp.13418.

Genome-Wide Identification and Expression Analysis of Chitinase Genes in Watermelon under Abiotic Stimuli and Infection.

Xuan C, Feng M, Li X, Hou Y, Wei C, Zhang X Int J Mol Sci. 2024; 25(1).

PMID: 38203810 PMC: 10779513. DOI: 10.3390/ijms25010638.

Genotyping by Sequencing (GBS)-Based QTL Mapping for Bacterial Fruit Blotch (BFB) in Watermelon.

Yeo S, Hong J, Hossain M, Jung H, Choe P, Nou I Genes (Basel). 2022; 13(12).

PMID: 36553516 PMC: 9777634. DOI: 10.3390/genes13122250.

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