Genomic markers analysis associated with resistance to Alternaria alternata (fr.) keissler-tomato pathotype, Solanum lycopersicum L.

IF 2 4区 农林科学 Q2 AGRONOMY Breeding Science Pub Date : 2022-09-01 DOI:10.1270/jsbbs.22003
Giti Alizadeh-Moghaddam, Mehdi Nasr-Esfahani, Zahra Rezayatmand, Mahdi Khozaei
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引用次数: 4

Abstract

Alternaria alternata, the causal pathogen of early blight (EB) disease, is one of the most important diseases in tomato, and other solanaceae family. We analyzed 35 tomato genotypes for quantitative/qualitative traits and biomass growth parameters, as well as the extent and structure of genetic variation associated with EB resistance. Phenotypic comparisons displayed significant differences in leaf blade width (24.95%), stem thickness (30.28%), foliage density (18.88%), and plant size (18.89%), with significant positive correlations with EB resistance (0.18-0.75). Correlation analysis showed that mature fruit size, thickness of fruit pericarp, and leaf type were significantly and negatively correlated with EB resistance (up to -0.41). The susceptible tomato seedlings represented significant reductions in biomass parameters. According to ISSR analysis, the highest resolving power (≥0.79) and heterozygosity (≥0.24) values revealed the presence of high genetic variability among the tomato genotypes. Bayesian model-based STRUCTURE analysis assembled the genotypes into 4 (best ΔK = 4) genetic groups. Combined phenotypic and molecular markers proved to be significantly useful for genetic diversity assessment associated with EB disease resistance.

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茄疫病(Solanum lycopersicum L.)抗性的基因组标记分析。
互交疫病(Alternaria alternata)是引起番茄早疫病(EB)的主要病原菌,是番茄等茄科植物的重要病害之一。分析了35个番茄基因型的数量/质量性状和生物量生长参数,以及与EB抗性相关的遗传变异程度和结构。表型比较显示,叶片宽度(24.95%)、茎粗(30.28%)、叶密度(18.88%)和植株大小(18.89%)差异显著,且与EB抗性呈显著正相关(0.18 ~ 0.75)。相关分析表明,成熟果实大小、果皮厚度和叶型与EB抗性呈显著负相关(最高达-0.41)。感病番茄幼苗生物量参数显著降低。ISSR分析显示,最高分辨率(≥0.79)和杂合度(≥0.24)表明番茄基因型间存在较高的遗传变异性。基于贝叶斯模型的结构分析将基因型分为4个(最佳ΔK = 4)遗传群。表型和分子联合标记被证明对与EB病抗性相关的遗传多样性评估非常有用。
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来源期刊
Breeding Science
Breeding Science 农林科学-农艺学
CiteScore
4.90
自引率
4.20%
发文量
37
审稿时长
1.5 months
期刊介绍: Breeding Science is published by the Japanese Society of Breeding. Breeding Science publishes research papers, notes and reviews related to breeding. Research Papers are standard original articles. Notes report new cultivars, breeding lines, germplasms, genetic stocks, mapping populations, database, software, and techniques significant and useful for breeding. Reviews summarize recent and historical events related breeding. Manuscripts should be submitted by corresponding author. Corresponding author must have obtained permission from all authors prior to submission. Correspondence, proofs, and charges of excess page and color figures should be handled by the corresponding author.
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