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首页> 外文期刊>Genetic Resources and Crop Evolution >Reconstructing an ancient bottleneck of the movement of the lentil (Lens culinaris ssp. culinaris) into South Asia
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Reconstructing an ancient bottleneck of the movement of the lentil (Lens culinaris ssp. culinaris) into South Asia

机译：重建扁豆（Lens culinaris ssp。culinaris）进入南亚的古老瓶颈

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摘要

Crop movement often leads to genetic bottlenecks. The lentil was domesticated in the Eastern Mediterranean region. Dissemination from highland Afghanistan into the Indo-Gangetic Plain, where it is of major importance today, caused a founder effect creating a genetic bottleneck. To understand the process and assist breeders with broadening the consequent narrow genetic base, this study re-constructs the founder effect by a re-examination of historical world germplasm evaluations at an intermediate elevation site in Pakistan–Islamabad, and at a low elevation site—Faisalabad representative of the Indo-Gangetic Plain. At Islamabad 72% of landrace accessions of an Afghan origin did not flower and the remaining Afghan accessions were among the latest flowering accessions in the world germplasm collection. At Faisalabad late flowering accessions produced low yields with each week’s delay in flowering giving a yield loss of 9.2%. Prehistorically Afghan lentil germplasm probably harboured recessive alleles for time to flower, possibly from introgression with wild lentil (Lens culinaris ssp. orientalis) in Afghanistan, which were then cyclically recombined and selected for as part of the dissemination process into the Indo-Gangetic Plain.
机译：作物运动通常会导致基因瓶颈。小扁豆在东地中海区域被驯化。从阿富汗高地传播到今天对印度至关重要的印度恒河平原，造成了奠基者效应，造成了基因瓶颈。为了了解这一过程并协助育种者扩大随之而来的狭窄遗传基础，本研究通过对巴基斯坦-伊斯兰堡中海拔地区和低海拔地区的历史世界种质评估进行重新审查，从而重建了创始人的作用。费萨拉巴德代表印度恒河平原。在伊斯兰堡，有72％的阿富汗原住民种没有开花，而其余的阿富汗种则是世界种质资源中最新的开花种。在费萨拉巴德（Faisalabad），较晚开花的种质收成低，每周延迟开花，使产量损失9.2％。史前的阿富汗小扁豆种质可能藏有隐性等位基因以便开花，可能是由于与阿富汗的野生小扁豆（Lens culinaris ssp.orientalis）渗入，随后被周期性地重组并选择为向印度-恒河平原传播的一部分。

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