Identification of QTLs associated with resistance to bacterial wilt in pepper (Capsicum annuum L.) through bi-parental QTL mapping and genome-wide association analysis

Lee, Joung-Ho; Siddique, Muhammad Irfan; Jang, Siyoung; Kim, Geon-Woo; Choi, Gyung Ja; Kwon, Jin-Kyung; Kang, Byoung-Cheorl

doi:10.1016/j.scienta.2024.112987

Cited by 2 publications

(1 citation statement)

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“…The bacterial wilt (BW) of tomatoes, caused by Ralstonia solanacearum , is a devastating disease that results in substantial annual crop losses worldwide. Over 200 plant species are susceptible to BW, including several members of the Solanaceae family [ 1 , 2 , 3 , 4 ]. Ralstonia can survive in soils, crop debris, and weed species under favorable environmental conditions [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

Quantitative Trait Loci Mapping for Bacterial Wilt Resistance and Plant Height in Tomatoes

Siddique,

Silverman,

Louws

et al. 2024

Plants

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Bacterial wilt (BW) of tomatoes, caused by Ralstonia solanacearum, is a devastating disease that results in large annual yield losses worldwide. Management of BW of tomatoes is difficult due to the soil-borne nature of the pathogen. One of the best ways to mitigate the losses is through breeding for disease resistance. Moreover, plant height (PH) is a crucial element related to plant architecture, which determines nutrient management and mechanical harvesting in tomatoes. An intraspecific F2 segregating population (NC 11212) of tomatoes was developed by crossing NC 84173 (tall, BW susceptible) × CLN1466EA (short, BW resistant). We performed quantitative trait loci (QTL) mapping using single nucleotide polymorphic (SNP) markers and the NC 11212 F2 segregating population. The QTL analysis for BW resistance revealed a total of three QTLs on chromosomes 1, 2, and 3, explaining phenotypic variation (R2) ranging from 3.6% to 14.9%, whereas the QTL analysis for PH also detected three QTLs on chromosomes 1, 8, and 11, explaining R2 ranging from 7.1% to 11%. This work thus provides information to improve BW resistance and plant architecture-related traits in tomatoes.

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Section: Introductionmentioning

confidence: 99%

Quantitative Trait Loci Mapping for Bacterial Wilt Resistance and Plant Height in Tomatoes

Siddique,

Silverman,

Louws

et al. 2024

Plants

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Evaluation of Pepper (Capsicum spp.) Germplasm Collection for Bacterial Wilt (Ralstonia solanacearum) Resistance

Ro,

Haile,

et al. 2024

Agronomy

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This study was conducted to identify resistant pepper accessions against the destructive disease bacterial wilt (BW) caused by Ralstonia solanacearum. A total of 338 pepper (Capsicum species) germplasms collected from different countries and deposited in the National Agrobiodiversity Genebank, Rural Development Administration (RDA), Republic of Korea, were evaluated. The evaluated accessions comprise samples from five distinct species: Capsicum annuum (213), Capsicum baccatum (47), Capsicum chinense (45), Capsicum frutescens (31), and Capsicum chacoense (2). Disease severity scores were recorded over four consecutive weeks and showed an increase in severity from initial inoculation to the end of the evaluation period. A strong correlation was observed between week 1 and 2, as well as between week 3 and 4. Ten resistant pepper accessions were identified. All selected accessions consistently exhibited low disease scores ranging from 0 to 1 throughout the observation period. These accessions belong to C. chinense (2), C. annuum (6), C. chacoense (1), and C. frutescens (1). Accessions such as IT236738 (C. chinense) and IT283498 (C. chinense) were demonstrated to have high resistance, showing no symptoms over all four weeks. Other accessions belonging to C. annuum (IT247232 and IT236340) and C. chacoense (IT158713) maintained a disease score of 0 (no symptoms) for the first three consecutive weeks; however, they developed symptoms with a score of 1 in the fourth week. Other important characteristics of the resistant materials were evaluated, including carotenoids and fruit characteristics. These accessions have important traits beyond resistance to the destructive pepper disease. They will serve as promising resources for breeding resistant pepper varieties against BW to enhance productivity.

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Identification of QTLs associated with resistance to bacterial wilt in pepper (Capsicum annuum L.) through bi-parental QTL mapping and genome-wide association analysis

Cited by 2 publications

References 74 publications

Quantitative Trait Loci Mapping for Bacterial Wilt Resistance and Plant Height in Tomatoes

Quantitative Trait Loci Mapping for Bacterial Wilt Resistance and Plant Height in Tomatoes

Evaluation of Pepper (Capsicum spp.) Germplasm Collection for Bacterial Wilt (Ralstonia solanacearum) Resistance

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