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首页> 外文期刊>Scientia horticulturae >Identification of weeping crabapple cultivars by microsatellite DNA markers and morphological traits
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Identification of weeping crabapple cultivars by microsatellite DNA markers and morphological traits

机译：利用微卫星DNA标记和形态特征鉴定垂枝海棠品种

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Ornamental crabapples are small landscape trees with charming flowers, colourful fruits and many growth forms. The first weeping crabapple cultivars, Mains prunifolia 'Pendula' and 'Pendula Nova', were described in Sweden around 150 years ago. Our study was aimed at identification and characterization of weeping crabapple clones by microsatellite markers and morphological traits. We analysed 13 Swedish and Finnish trees and 8 reference accessions including M. prunifolia 'Pendula' and three international cultivars belonging to its progeny. The 21 trees represented 13 distinct genotypes. Five local trees were identified as the historical 'Pendula', assumed to be extinct from the nursery trade. On the basis of morphological traits and historical records, two old Swedish trees were concluded to represent 'Pendula Nova'. The authenticity of the trees could not be confirmed by DNA markers because no known plant of the old cultivar was found in botanical collections. The Finnish clone 'Hyvingiensis' proved unique among the crabapple accessions studied. 'Hyvingiensis' was probably raised from seed at the Finnish State Railways Nurseries about 110 years ago. Several mislabellings were revealed among both the local and the reference samples. A novel identification key was created to aid discrimination between the clones by their morphological traits. A combination of DNA fingerprints, comparison of morphological traits and tracing information in relevant archives and old garden literature proved useful for solving the origin and identity of weeping crabapples. The results contribute to conservation of garden plants and stabilization of horticultural nomenclature. (C) 2014 Elsevier B.V. All rights reserved.
机译：观赏海棠是风景秀丽的小树，开着迷人的花朵，五颜六色的水果和许多生长形式。大约150年前在瑞典描述了最早的垂枝海棠品种，Mains prunifolia“ Pendula”和“ Pendula Nova”。我们的研究旨在通过微卫星标记和形态性状鉴定和表征垂枝海棠克隆。我们分析了13棵瑞典和芬兰的树木，以及8种参考种，包括普氏摩根草'Pendula'和三个属于其后代的国际品种。这21棵树代表了13种不同的基因型。五种本地树木被确定为历史性的“秋茄”，被认为已从苗圃业中灭绝。根据形态特征和历史记录，总结出两棵古老的瑞典树木代表“ Pendula Nova”。 DNA标记不能证实树木的真实性，因为在植物学收集物中未发现该老品种的已知植物。在研究的海棠种中，芬兰克隆“ Hyvingiensis”被证明是独特的。大约110年前，“ Hyvingiensis”可能是从芬兰国家铁路苗圃的种子中长出来的。在本地和参考样品中都发现了一些标签错误。创建了一种新颖的识别密钥，以通过克隆的形态特征来帮助对其进行区分。 DNA指纹图谱，形态特征的比较和相关档案中的追踪信息以及旧花园文献的结合被证明对解决垂枝海棠的起源和身份很有用。结果有助于园林植物的保护和园艺命名的稳定。 （C）2014 Elsevier B.V.保留所有权利。

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