AI Article Synopsis
- Bacterial spot is a significant disease affecting pepper plants, particularly in warm, humid areas, and resistant plant varieties are key to managing this issue.
- Researchers in this study aimed to locate two specific genetic resistance genes (let's call them Gene A and Gene B) in the pepper genome using a genotyping method.
- After mapping, they found Gene A on chromosome 3 and Gene B on chromosome 6, identifying several candidate resistance genes, which could assist in breeding more resilient pepper crops.
Article Abstract
Bacterial spot caused by is a major disease of pepper ( L.) in warm and humid production environments. Use of genetically resistant cultivars is an effective approach to manage bacterial spot. Two recessive resistance genes, and , confer non-race-specific resistance against bacterial spot. The objective of our study was to map these two loci in the pepper genome. We used a genotyping-by-sequencing approach to initially map the position of the two resistances. Segregating populations for and were developed by crossing susceptible Early CalWonder (ECW) with near-isogenic lines ECW50R ( introgression) or ECW60R ( introgression). Following fine-mapping, was delimited to a ~535 Kbp interval on chromosome 3, and to a ~666 Kbp interval in chromosome 6. We identified 14 and 8 candidate resistance genes for and , respectively, based on predicted protein coding polymorphisms between ECW and the corresponding resistant parent. This research enhances marker-assisted selection of and in breeding programs and is a crucial step towards elucidating the molecular mechanisms underlying the resistances.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10235544 | PMC |
| http://dx.doi.org/10.3389/fpls.2023.1061803 | DOI Listing |
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