Genetic Diversity of Rhododendron ripense Makino and Development of Related Cultivars Based on Microsatellite Analysis

IF 0.9 4区农林科学 Q4 HORTICULTURE Horticulture Journal Pub Date : 2024-04-19 DOI:10.2503/hortj.qh-135

Hideya Ohta, Kyoko Sugai, Akira Nakatsuka, Yuji Kurashige, Nobuo Kobayashi

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Abstract

In Japan, wild evergreen azalea species with high ornamental value, such as Rhododendron ripense, grow naturally, and numerous cultivars have been developed based on these species. In this study, we utilized microsatellite markers to examine the genetic relationships among wild evergreen azalea species in Japan, particularly focusing on R. ripense, as well as assessing the genetic diversity of R. ripense. STRUCTURE analysis revealed that when K = 2, R. ripense appeared to be distinct from other species. However, when K = 4, the R. ripense population exhibited two separate clusters. Further analysis at K = 10 revealed genetic diversity within the R. ripense population, which was divided into five clusters reflecting their respective geographic distributions. Analysis of cultivars related to R. ripense based on the results of wild species suggested that most of the Ryūkyū-tsutsuji (R. × mucronatum) cultivars originated from the Yamakuni River in the northern Kyushu region or the San’in region of R. ripense.

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基于微卫星分析的牧野杜鹃（Rhododendron ripense Makino）遗传多样性及相关栽培品种的开发

在日本，杜鹃花（Rhododendron ripense）等具有很高观赏价值的野生常绿杜鹃花物种自然生长，并以这些物种为基础培育出了许多栽培品种。在这项研究中，我们利用微卫星标记研究了日本野生常绿杜鹃物种之间的遗传关系，尤其是杜鹃花（R. ripense），并评估了杜鹃花（R. ripense）的遗传多样性。STRUCTURE 分析表明，当 K = 2 时，R. ripense 似乎与其他物种不同。然而，当 K = 4 时，R. ripense 种群表现出两个独立的群集。进一步分析发现，当 K = 10 时，R. ripense 群体内部的遗传多样性被分为五个群组，反映了它们各自的地理分布。根据野生种的结果对与R. ripense相关的栽培品种进行分析表明，大多数Ryūkyū-tsutsuji（R. × mucronatum）栽培品种起源于九州北部的山国川或R. ripense的San'in地区。

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来源期刊

Horticulture Journal HORTICULTURE-

CiteScore

2.20

自引率

8.30%

发文量

期刊介绍： The Horticulture Journal (Hort. J.), which has been renamed from the Journal of the Japanese Society for Horticultural Science (JJSHS) since 2015, has been published with the primary objective of enhancing access to research information offered by the Japanese Society for Horticultural Science, which was founded for the purpose of advancing research and technology related to the production, distribution, and processing of horticultural crops. Since the first issue of JJSHS in 1925, Hort. J./JJSHS has been central to the publication of study results from researchers of an extensive range of horticultural crops, including fruit trees, vegetables, and ornamental plants. The journal is highly regarded overseas as well, and is ranked equally with journals of European and American horticultural societies.