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首页> 外文期刊>Genetic Resources and Crop Evolution >Nature of taro (Colocasia esculenta (L.) Schott) genetic diversity prevalent in a Pacific Ocean island, Vanua Lava, Vanuatu
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Nature of taro (Colocasia esculenta (L.) Schott) genetic diversity prevalent in a Pacific Ocean island, Vanua Lava, Vanuatu

机译：芋头（Colocasia esculenta（L.）Schott）遗传多样性在太平洋瓦努阿图瓦努阿熔岩中普遍存在

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摘要

Taro (Colocasia esculenta (L.) Schott), cultivated in Vetuboso, a village of northern Vanuatu, Melanesia, was surveyed to: (1) assess the extent of morphological and molecular variation being maintained by growers at the village level and, (2) comparethis diversity with the diversity found in the crops in Vanuatu. Ethnobotanical data were combined with AFLP analysis to elucidate possible sources of variation. Folk assessment of variation is based on: (a) morphological characteristics (11 characters), (b) names and (c) classification according to habitat, uses, origin and agronomic adaptation. This 3-fold approach allowed growers to differentiate 96 morphotypes, all of which are given distinct vernacular names. AFLP fingerprints successfully differentiated all these 96 morphotypes which do not present a significant intra-clonal variation. But genetic results showed no clear groupings according to geographic origin or habitat of morphotypes and stated that the diversity found within the village wascomparable with the overall diversity found in Vanuatu. Local nomenclature and stories associated with each cultivar suggested three sources of diversity: introductions (38%), somatic mutations (15%) and sexual recombinations (48%). AFLP results confirmfolk beliefs about origin at least for three pairs of mutants. The 11 so-called wild forms analysed by AFLP were suggested to be feral, escapes from domestication. A dynamic in situ conservation strategy (DISC), favouring a broadening of the national genetic base, was discussed for taro.
机译：在美拉尼西亚瓦努阿图北部村庄韦图博索种植的芋头（Colocasia esculenta（L.）Schott）调查表明：（1）评估村民在种植者维持的形态和分子变异程度，以及（2 ）将此多样性与瓦努阿图农作物中发现的多样性进行比较。民族植物学数据与AFLP分析相结合，阐明了可能的变异来源。民间对变异的评估基于：（a）形态特征（11个字符），（b）名称和（c）根据栖息地，用途，起源和农艺适应性分类。这种3倍方法使种植者能够区分96种形态，所有这些形态都有不同的白话名字。 AFLP指纹图谱成功区分了所有这96种形态型，这些形态型没有明显的克隆内变异。但是遗传结果显示，没有根据地理来源或形态类型的栖息地进行清晰的分组，并指出在村庄内发现的多样性与在瓦努阿图发现的总体多样性可比。与每个品种相关的当地命名法和故事提示了多样性的三种来源：引种（38％），体细胞突变（15％）和性重组（48％）。 AFLP结果证实了至少三对突变体对起源的民间信仰。 AFLP分析的11种所谓的野生形式被认为是野生的，不能驯化。讨论了芋头的动态原位保护战略（DISC），有利于扩大国家遗传基础。

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