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首页> 外文期刊>Genetic Resources and Crop Evolution >Molecular evidence for repeated recruitment of wild Christmas poinsettia (Euphorbia pulcherrima) into traditional horticulture in Mexico
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Molecular evidence for repeated recruitment of wild Christmas poinsettia (Euphorbia pulcherrima) into traditional horticulture in Mexico

机译：在墨西哥的传统园艺中重复招募野生圣诞一品红（大戟POINSETTIA（大戟属Pulcherrima）的分子证据

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摘要

One of Mexico's most emblematic and economically important plants is the poinsettia (Euphorbia pulcherrima). After nearly 200years of poinsettia cultivation outside Mexico, more than 300 varieties of many different sizes, shapes and colors have been generated. However, studies on the management ofor the evolutionary processes through which the changes present in cultivars have been generated, starting from wild plants, have not been carried out. In the present work, we tested the hypothesis that poinsettia plants living in human settlements represent transplanted wild plants. To test this hypothesis, we analyzed the genetic diversity and kin relationships of 58 poinsettia plants from 25 wild populations, 25 garden plants and 8 Mexican and foreign cultivars. Two non-coding intergenic chloroplast markers, trnG-trnS and psbA-trnH, were utilized to obtain the diversity indices and genealogies. The results support the transplanting of poinsettias hypothesis because garden plants share the same genetic variant as the wild populations and, in most cases, that of the closest wild populations. Some garden poinsettias havesimple inflorescences, like the wild plants. The garden plants have a genetic diversity that is higher than in cultivars and that is shared with nearby wild populations. Additionally, some homeowners indicated that their plants were obtained from nearby hills. The transplanting of wild poinsettia plants to human settlements could have been one of the first steps in the domestication process of E. pulcherrima. Also, new genetic variants were found; one of these could be Euphorbia fastuosa, an invalid name for E. pulcherrima proposed by Sesse and Mocino between 1787 and 1803.
机译：墨西哥最具象征性和经济上重要的植物之一是一品红（大戟属Pulcherrima）。经过墨西哥以外近200年的一品红栽培，已经产生了超过300多种不同尺寸，形状和颜色的品种。然而，对来自野生植物产生的栽培品种变化的进化过程的研究尚未进行。在目前的工作中，我们测试了生活在人类住区的一品红植物代表移植野生植物。为了测试这一假设，我们分析了来自25个野生种群，25个花园植物和8个墨西哥和外国品种的58个一品红植物的遗传多样性和亲属关系。使用两个非编码的叶绿体标记物，TRNG-TRNS和PSBA-TRNH，以获得多样性指数和遗传学。结果支持一品红假设的移植，因为园林植物与野生种群相同的遗传变异，并且在大多数情况下，最接近的野生种群。一些花园一品红有充满花序，就像野生植物一样。花园植物具有高于品种的遗传多样性，与附近的野生种群共用。此外，一些房主表明他们的植物是从附近的山丘获得的。野生一品红植物对人类定居点的移植可能是E. Pulcherrima驯化过程中的第一步之一。此外，发现了新的遗传变异;其中一个可以是大戟快餐，Sesse和Mocino在1787年至1803之间提出的E.Pulcherrima的无效名称。

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