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Special Issue "Vegetable Genetics and Genomics 2.0"

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Guest Editor

College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
Interests: cucumber; capsicum pepper; vegetable germplasm enhancement; vegetable molecular breeding; vegetable genomics; methylation; environmental acclimation; disease resistance; flowering and sex expression
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Prof. Dr. Xixiang Li

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Guest Editor

Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Interests: vegetable crop evolution and classification; genetic diversity; genetic analysis of target traits; gene mapping; vegetable genomics; transcriptome; flowering and sex expression; resistance to diamond back moth and black rot; radish, cucumber
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue is a continuation of our previous Special Issue on “Vegetable Genetics and Genomics”.

Vegetables, as an indispensable non-staple type of food in people’s daily diet, provide a variety of essential vitamins, minerals, and other nutrients, as well as special phytochemicals which are recognized as functional components for human nutritional balance or medicinal purposes. With the increase in population and dramatic climate change all around the world, there is an increasing demand from societies for a higher quantity and quality of major vegetables. In order to improve the production performance and product quality of vegetable crops effectively, it is first necessary to understand the genetic bases of important horticultural traits, quality characteristics, and stress tolerances, and to reveal the crucial genes underlying these traits and their molecular regulation mechanisms for elite trait expression or beneficial component metabolism.

In the past decade, the rapid development of sequencing technologies has promoted great advances in the genetics and genomics of vegetable crops. This Special Issue on “Vegetable Genetics and Genomics” welcomes the submission of review and original research papers or short communications on the following topics: vegetable genome, comparative genome, and variome research; genetic dissections of important horticultural breeding target traits; quality and tolerance to biotic or abiotic stress; and discoveries of new key genes and their molecular regulation mechanisms for valuable traits or metabolic pathways through the advanced technologies of molecular genetics and multiple omics.

Prof. Dr. Yunsong Lai
Prof. Dr. Xixiang Li
Guest Editors

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. International Journal of Molecular Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

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Keywords

major vegetable crops
genome
variome
genotyping
GWAS
QTL mapping
functional genome
metabolome
breeding target characters
genetic mechanism
functional genes

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Research

Open AccessArticle

A Comprehensive Genome-Wide Association Study of Carotenoid and Capsaicinoid Contents in Capsicum chinense Germplasm

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Int. J. Mol. Sci. 2023, 24(18), 13885; https://doi.org/10.3390/ijms241813885 - 09 Sep 2023

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Abstract

Pepper is a highly important vegetable globally, both economically and nutritionally. However, to efficiently select and identify genetic resources for pepper breeding programs, it is crucial to understand the association between important traits and genetic factors. In this study, we investigated the genetic basis of carotenoid and capsaicinoid content in 160 Capsicum chinense germplasms. The study observed significant variability in carotenoid and capsaicinoid content among the germplasms. Correlation analysis revealed a strong positive correlation between violaxanthin and antheraxanthin. In contrast, capsaicin and dihydrocapsaicin displayed negative correlations with individual carotenoids but exhibited a strong positive correlation between the two compounds (r = 0.90 ***). Genotyping-by-sequencing (GBS) was performed on 160 genotypes of pepper germplasm, which identified 47,810 high-quality SNPs. A comprehensive genome-wide association analysis was performed using these SNPs to identify SNPs associated with carotenoids and capsaicinoids, revealing 193 SNPs that exhibited significant associations. Specifically, 4 SNPs were associated with violaxanthin, 2 with antheraxanthin, 86 with capsorubin, 5 with capsanthin, 63 with zeaxanthin, 3 with β-cryptoxanthin, and 2 with α-carotene. With further studies, the significantly associated SNPs identified in this study have the potential to be utilized for selecting pepper accessions with high carotenoid and capsaicinoid contents. Additionally, the genes associated with these significant SNPs will be used to understand their roles and involvement in the biosynthesis pathway of carotenoids and capsaicinoids. Understanding the function of these genes can provide insights into the molecular mechanisms underlying the production of these bioactive compounds in pepper. The findings of this study hold valuable implications for selecting pepper varieties with desirable traits and developing breeding programs aimed at enhancing the nutritional and medicinal properties of pepper. Full article

(This article belongs to the Special Issue Vegetable Genetics and Genomics 2.0)

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Special Issue "Vegetable Genetics and Genomics 2.0"

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