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首页> 外文期刊>Genetic Resources and Crop Evolution >The global distribution of wild tarragon (Artemisia dracunculus L.; Asteraceae) cytotypes with twenty-seven new records from North America
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The global distribution of wild tarragon (Artemisia dracunculus L.; Asteraceae) cytotypes with twenty-seven new records from North America

机译：野生龙蒿（Artemisia dracunculus L.; Asteraceae）细胞型的全球分布，有来自北美的27个新记录

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摘要

Artemisia dracunculus (wild or Russian tarragon), is a polymorphic, herbaceous perennial with a widespread distribution that spans western North America, Eastern Europe and most temperate of Asia. This wild relative of the culinary herb French tarragon has recently been the focus of a number of studies which have investigated its medicinal activity in type 2 diabetes bioassays. The species is documented as having from diploid to decaploid cytotypes and chemical variation has previously been shown to occur between cytotypes. To help focus germplasm collecting efforts for ongoing studies on variation of medicinal compounds within the species, a literature review of the geographical occurrences of cytotypes was conducted. This review revealed a lack of records from North America. In order to fill in this gap in the cytogeographic distribution, meiotic chromosome counts and flow cytometry were used to determine the ploidy level of 27 individuals from 16 different populations throughout the western United States. The results revealed distinct patterns of cytotype distribution. Both diploids and polyploid cytotypes were found in Eurasia, and the distributional range of each cytotype was found to be increasingly restricted as ploidy increased. For North America, even with the inclusion of many new records, only diploid populations were documented, with the exception of one hexaploid record from Arizona which was found in the literature.
机译：龙蒿（野生或俄罗斯龙蒿），是一种多态的多年生草本植物，分布广泛，遍布北美西部，东欧和亚洲最温带。烹饪草药法国龙蒿的这种野生近缘种最近成为许多研究的焦点，这些研究在2型糖尿病生物测定中研究了其药用活性。该物种被记录为具有从二倍体到十倍体的细胞型，并且先前已经显示出化学变异在细胞型之间发生。为了帮助集中种质资源收集资源以进行有关物种内药用化合物变异的正在进行的研究，对细胞类型的地理发生进行了文献综述。这项审查发现缺乏来自北美的记录。为了填补细胞地理分布中的这一空白，减数分裂染色体计数和流式细胞仪用于确定美国西部16个不同人群中27个个体的倍性水平。结果揭示了不同类型的细胞型分布。在欧亚大陆上发现了二倍体和多倍体细胞型，并且随着倍体性的增加，每种细胞型的分布范围也越来越受到限制。对于北美，即使包含许多新记录，也仅记录了二倍体种群，但文献中发现了亚利桑那州的六倍体记录。

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