Lost crops of the Incas: Origins of domestication of the Andean pulse crop tarwi, Lupinus mutabilis
Lost crops of the Incas: Origins of domestication of the Andean pulse crop tarwi, Lupinus mutabilis
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DOI：
10.3732/ajb.1600171
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发表时间：
2016-09-01
影响因子：
3
通讯作者：
Hughes, Colin E.
中科院分区：
文献类型：
--
作者：
Atchison, Guy W.;Nevado, Bruno;Hughes, Colin E.
研究前提：安第斯高地是驯化的热点，但我们对早期安第斯农业起源的理解仍然是零碎的。许多安第斯作物在何处、何时、经过多少次以及从什么祖先驯化的关键问题仍然没有答案。安第斯山羽扇豆作物tarwi（Lupinus mutabilis）是一个区域重要的豆类作物，种子蛋白质和油含量非常高，是现代育种工作的重点，但其起源仍然模糊不清。变种人和近亲系统发育和人口统计学分析被用来确定可能的祖先tarwi和阐明的区域和时间驯化结合考古证据。关键结果：我们推断，tarwi被驯化一次在北方秘鲁，最有可能在卡哈马卡地区内，或毗邻现存的分布L。piurensis，这是最有可能的野生祖先。人口统计分析表明，塔尔维是从L. piurensis在2600 BP左右出现驯化瓶颈。最早明确的驯化tarwi种子的考古证据是从曼塔罗谷，中部秘鲁约。结论：tarwi的起源可能与L.秘鲁北方的piurensis为该区域重要作物的驯化提供了可靠的工作假设，并且是起源于秘鲁北方高地的作物的第一个明确的例子之一。
PREMISE OF THE STUDY: The Andean highlands are a hotspot of domestication, yet our understanding of the origins of early Andean agriculture remains fragmentary. Key questions of where, when, how many times, and from what progenitors many Andean crops were domesticated remain unanswered. The Andean lupine crop tarwi (Lupinus mutabilis) is a regionally important pulse crop with exceptionally high seed protein and oil content and is the focus of modern breeding efforts, but its origins remain obscure.METHODS: A large genome-wide DNA polymorphism data set was generated using nextRADseq to infer relationships among more than 200 accessions of Andean Lupinus species, including 24 accessions of L. mutabilis and close relatives. Phylogenetic and demographic analyses were used to identify the likely progenitor of tarwi and elucidate the area and timing of domestication in combination with archaeological evidence.KEY RESULTS: We infer that tarwi was domesticated once in northern Peru, most likely in the Cajamarca region within, or adjacent to the extant distribution of L. piurensis, which is the most likely wild progenitor. Demographic analyses suggest that tarwi split from L. piurensis around 2600 BP and suffered a classical domestication bottleneck. The earliest unequivocal archaeological evidence of domesticated tarwi seeds is from the Mantaro Valley, central Peru ca. 1800 BP.CONCLUSIONS: A single origin of tarwi from L. piurensis in northern Peru provides a robust working hypothesis for the domestication of this regionally important crop and is one of the first clear-cut examples of a crop originating in the highlands of northern Peru.