澳洲百香果种质资源遗传多样性及群体结构研究。

IF 3.1 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY
BioTech Pub Date : 2025-05-16 DOI:10.3390/biotech14020037
Xinhang Sun, Peter Bundock, Patrick Mason, Pragya Dhakal Poudel, Rajeev Varshney, Bruce Topp, Mobashwer Alam
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引用次数: 0

摘要

种质资源遗传变异的评价是培育优良品种的基础。然而,关于栽培百香果种质多样性的信息有限。对澳大利亚百香果(Passiflora spp.)的94根砧木和95个接穗的遗传多样性进行了评估,以支持旨在提高产量、果实质量和作物整体抗灾能力的育种计划。砧木采用基于高密度24k多样性阵列技术(DArT)的单核苷酸多态性(SNP)标记进行基因分型,接穗采用8个SSR标记进行遗传鉴定。由此产生的遗传关系揭示了砧木群体内的显著变异。结构贝叶斯聚类分析表明,砧木群体可划分为6个不同的遗传群,而接穗材料中仅鉴定出2个亚群。基于snp的基因分型进一步突出了澳大利亚砧木的等位基因多样性,表明砧木改良具有丰富的遗传性状库。这些发现强调了保护和利用澳大利亚百香果种质资源遗传多样性的重要性,以推动发展对不同环境条件具有更强适应性和性能的优良品种。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Exploring Genetic Diversity and Population Structure of Australian Passion Fruit Germplasm.

Evaluating the genetic variability of germplasms is essential for enhancing and developing superior cultivars. However, there is limited information on cultivated germplasm diversity for Australian passion fruit breeding programs. The genetic diversity of Australian passion fruit (Passiflora spp.), including 94 rootstocks and 95 scions, was evaluated to support breeding programs aimed at enhancing productivity, fruit quality, and overall crop resilience. Rootstocks were genotyped using high-density 24k Diversity Arrays Technology (DArT)-based single-nucleotide polymorphism (SNP) markers, while genetic characterization of scions was conducted using eight simple sequence repeat (SSR) markers. The resulting genetic relationships revealed significant variation within rootstock populations. Bayesian cluster analysis in STRUCTURE showed that the rootstock population was divided into six distinct genetic groups, whereas only two subpopulations were identified among the scion accessions. SNP-based genotyping further highlighted the allelic diversity of Australian rootstocks, suggesting a rich reservoir of genetic traits for rootstock improvement. These findings underscore the importance of preserving and utilizing genetic diversity in Australian passion fruit germplasm to drive the development of superior cultivars with enhanced adaptability and performance under diverse environmental conditions.

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来源期刊
BioTech
BioTech Immunology and Microbiology-Applied Microbiology and Biotechnology
CiteScore
3.70
自引率
0.00%
发文量
51
审稿时长
11 weeks
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