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首页> 外文期刊>Genetic Resources and Crop Evolution >Genetic diversity and relationships between wild and cultivated olives (Olea europaea L.) in Sardinia as assessed by SSR markers
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Genetic diversity and relationships between wild and cultivated olives (Olea europaea L.) in Sardinia as assessed by SSR markers

机译：通过SSR标记评估撒丁岛野生和栽培橄榄（Olea europaea L.）的遗传多样性和亲缘关系

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摘要

The genetic relationships within and between wild and cultivated olives were examined and clarified in an isolated and restricted area, such as the Mediterranean island of Sardinia. Wild (21 individuals) and cultivated olive trees (22 local cultivars from a germplasm collection and 35 ancient trees) were genotyped by means of 13 SSR loci. Five cases of synonymy were observed and nine distinct genotypes were identified in the collection. Five novel genotypes were also detected among the ancient trees. Differences on the allelic composition and heterozygosity levels were found between wild and cultivated trees. Model-based clustering method classified the olive trees into two major gene pools: (a) wild genotypes and (b) local cultivars from the collection and from heritage olives. Regarding the cultivated plant material, we observed that: (a) most of the Sardinian cultivars shared the same allelic profiles with the ancient cultivated trees and (b) the majority of these cultivars and all the novel genotypes were not related to any other cultivars included in this study. These findings as well as the detection of unique alleles and a certain wild genetic background at some cultivars revealed by the Bayesian analysis may indicate their autochthonous origin. The synonymy cases found between local cultivars and Italian mainland cultivars indicate interchange of genetic material among these growing areas, suggesting thus a possible allochthonous origin. The information obtained can assist in the management of an olive collection and sheds some light on the survival of true oleasters and the origin of Sardinian cultivars.
机译：在一个孤立且受限制的区域（例如地中海撒丁岛）中检查并弄清了野生橄榄和栽培橄榄之间及其之间的遗传关系。通过13个SSR基因座对野生（21个个体）和栽培的橄榄树（22个来自种质资源的本地品种和35棵古树）进行基因分型。观察到5个同义词案例，并在集合中鉴定出9个不同的基因型。在古树之间还发现了五种新的基因型。在野生树和栽培树之间发现了等位基因组成和杂合度水平的差异。基于模型的聚类方法将橄榄树分为两个主要的基因库：（a）野生基因型和（b）来自采集的橄榄和传统橄榄的本地品种。关于栽培的植物材料，我们观察到：（a）大多数撒丁岛栽培品种与古代栽培树具有相同的等位基因特征，并且（b）这些栽培品种中的大多数和所有新的基因型与所包括的任何其他栽培品种都不相关在这个研究中。这些发现以及贝叶斯分析揭示的某些品种的独特等位基因和某些野生遗传背景的检测，可能表明它们的自发起源。在本地品种和意大利本土品种之间发现的同义案例表明这些生长区域之间遗传物质的互换，因此暗示可能是异源起源。获得的信息可以帮助管理橄榄的收集，并为真橄榄的生存和撒丁岛栽培种的起源提供一些启示。

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