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首页> 外文期刊>Genetic Resources and Crop Evolution >Geographical distribution of wild Daucus species in the natural grasslands of the Argentinian pampas
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Geographical distribution of wild Daucus species in the natural grasslands of the Argentinian pampas

机译：阿根廷南美大草原天然草地中野生淡水牛科物种的地理分布

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摘要

Three wild carrot species have been reported in the argentinian flora: Daucus montanus Humb. et Bonpl. ex Schult., D. montevidensis Link ex Sprengel and D. pusillus Michx. There is a discrepancy among authors about the distinctive morphological traits of the last two species; thus, it is difficult to ascertain if they are truly two distinct taxa. Based on the available literature and in the search of a paradigmatic site, four collection trips were carried out in 2004 and 2005 in Buenos Aires and Southern Entre Ríos provinces. Populations were sampled at 30 sites, and local environmental parameters and associated plant species were recorded. Morphological observations and chromosome counts were carried out on 10 plants/population. Three morphological phenotypes were distinguished: one in 18 populations, all with 2n = 2x = 18, and two in the remaining 12, with 2n = 2x = 22 or aneusomaty (2n = 2x = 20, 22). Populations of the first phenotype were assigned to wild D. carota and the rest, tentatively, to D. pusillus (D. montevidensis?), till further evaluations are carried out in test sites to verify this tentative conclusion.
机译：阿根廷植物群中已报告了三种野生胡萝卜：Daucus montanus Humb。 et Bonpl。前Schult。，D。montevidensis Link，前Sprengel和D. pusillus Michx。关于最后两个物种的独特形态特征，作者之间存在差异。因此，很难确定它们是否确实是两个不同的分类单元。根据现有文献并在范例站点中进行搜索，2004年和2005年在布宜诺斯艾利斯和南部恩特雷里奥斯省进行了四次收集旅行。在30个地点对种群进行了采样，并记录了当地的环境参数和相关的植物物种。对10株植物/种群进行了形态学观察和染色体计数。区分了三种形态学表型：18个种群中的一个，所有种群的2n = 2x = 18，另两个种群中的两个，2n = 2x = 22或气肿（2n = 2x = 20，22）。第一个表型的种群被分配给野生的D. carota，其余的被暂时分配给了D. pusillus（D. montevidensis？），直到在试验地点进行进一步的评估以验证这个初步的结论。

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