Sudheer Pamidimarri D V N, Reddy Muppala P
Discipline of Wasteland Research, Central Salt and Marine Chemicals Research Institute (CSIR), G. B. Marg, Bhavnagar, 364002, Gujarat, India,
Mol Biol Rep. 2014 May;41(5):3225-34. doi: 10.1007/s11033-014-3185-7. Epub 2014 Jan 29.
Jatropha curcas L. (Euphorbiaceae) has acquired a great importance as a renewable source of energy with a number of environmental benefits. Very few attempts were made to understand the extent of genetic diversity and its distribution. This study was aimed to study the diversity and deduce the phylogeography of Jatropha curcas L. which is said to be the most primitive species of the genus Jatropha. Here we studied the intraspecific genetic diversity of the species distributed in different parts of the globe. The study also focused to understand the molecular diversity at reported probable center of origin (Mexico), and to reveal the dispersal route to other regions based on random amplified polymorphic DNA, amplified fragment length polymorphism and nrDNA-ITS sequences data. The overall genetic diversity of J. curcas found in the present study was narrow. The highest genetic diversity was observed in the germplasm collected from Mexico and supports the earlier hypothesis based on morphological data and natural distribution, it is the center for origin of the species. Least genetic diversity found in the Indian germplasm and clustering results revealed that the species was introduced simultaneously by two distinct germplasm and subsequently distributed in different parts of India. The present molecular data further revealed that J. curcas might have spread from the center of the origin to Cape Verde, than to Spain, Portuguese to other neighboring countries and simultaneously to Africa. The molecular evidence supports the Burkill et al. (A dictionary of the economic products of the Malay Peninsula, Governments of Malaysia and Singapore by the Ministry of Agriculture and Co-operatives. Kuala Lumpur, Malaysia, 1966) view of Portuguese might have introduced the species to India. The clustering pattern suggests that the distribution was interfered by human activity.
麻疯树（大戟科）作为一种具有诸多环境效益的可再生能源来源，已变得极为重要。人们很少尝试去了解其遗传多样性的程度及其分布情况。本研究旨在研究麻疯树的多样性并推断其系统地理学，麻疯树被认为是麻疯树属中最原始的物种。在此，我们研究了分布于全球不同地区的该物种的种内遗传多样性。该研究还着重了解在据报道的可能起源中心（墨西哥）的分子多样性，并基于随机扩增多态性DNA、扩增片段长度多态性和nrDNA-ITS序列数据揭示其向其他地区的传播途径。本研究中发现的麻疯树总体遗传多样性较窄。在从墨西哥收集的种质中观察到最高的遗传多样性，这支持了基于形态学数据和自然分布的早期假说，即墨西哥是该物种的起源中心。在印度种质中发现的遗传多样性最低，聚类结果表明该物种是由两种不同的种质同时引入的，随后分布于印度的不同地区。目前的分子数据进一步表明，麻疯树可能从起源中心传播到佛得角，再到西班牙、葡萄牙，然后到其他邻国，同时也传播到了非洲。分子证据支持了伯基尔等人（《马来半岛经济产品词典》，马来西亚和新加坡政府，由农业和合作社部编写。马来西亚吉隆坡，1966年）的观点，即葡萄牙人可能将该物种引入了印度。聚类模式表明其分布受到了人类活动的干扰。
