考古遗址中茄科植物种群的人类始祖效应证据:II.基因测序确定了跨越美国西南部的古代迁移。

IF 2.4 2区 生物学 Q2 PLANT SCIENCES
Bruce M. Pavlik, Alfonso del Rio, John Bamberg, Lisbeth A. Louderback
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引用次数: 0

摘要

前提:野生植物物种的驯化可以从土著居民采集和运输繁殖体开始。对基因组组成的影响,尤其是对克隆性、自相容性多年生植物的影响,将是瞬间的,而且对随后建立的新的人为种群影响巨大。遗传多样性和交配能力的降低将是症状性的,而独特等位基因和遗传序列的存在将揭示与考古遗址相关的种群的起源和祖先。因此,四角马铃薯(Solanum jamesii Torr.)目前在美国西南部的分布可能反映了从块茎运输开始的驯化过程的早期阶段。方法:本文通过对25个考古和非考古种群进行取样,利用基因测序(GBS)数据进一步研究了这一具有重要文化意义的物种的驯化假说:来自犹他州、科罗拉多州和亚利桑那州北部的考古种群的多态位点、独特等位基因和杂合度水平低于来自亚利桑那州中部和新墨西哥州莫格伦地区的非考古种群。主成分分析、Fst 值和结构分析表明,考古种群之间的遗传关系与地理上的接近程度并不相符。犹他州埃斯卡兰特的种群与莫格伦边缘(向南 400 公里)的种群有亲缘关系,与熊耳、查科峡谷和梅萨维德遗址的种群有多个起源和明显的分离:结论:过去,莫格伦地区的块茎可能曾多次向多个方向移动,导致整个四角地区的种群出现复杂的遗传模式。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Evidence for human-caused founder effect in populations of Solanum jamesii at archaeological sites: II. Genetic sequencing establishes ancient transport across the Southwest USA

Evidence for human-caused founder effect in populations of Solanum jamesii at archaeological sites: II. Genetic sequencing establishes ancient transport across the Southwest USA

Premise

The domestication of wild plant species can begin with gathering and transport of propagules by Indigenous peoples. The effect on genomic composition, especially in clonal, self-incompatible perennials would be instantaneous and drastic with respect to new, anthropogenic populations subsequently established. Reductions in genetic diversity and mating capability would be symptomatic and the presence of unique alleles and genetic sequences would reveal the origins and ancestry of populations associated with archaeological sites. The current distribution of the Four Corners potato, Solanum jamesii Torr. in the Southwestern USA, may thus reflect the early stages of a domestication process that began with tuber transport.

Methods

Herein genetic sequencing (GBS) data are used to further examine the hypothesis of domestication in this culturally significant species by sampling 25 archaeological and non-archaeological populations.

Results

Archaeological populations from Utah, Colorado and northern Arizona have lower levels of polymorphic loci, unique alleles, and heterozygosity than non-archaeological populations from the Mogollon region of central Arizona and New Mexico. Principle components analysis, Fst values, and structure analysis revealed that genetic relationships among archaeological populations did not correspond to geographic proximity. Populations in Escalante, Utah were related to those on the Mogollon Rim (400 km south) and had multiple origins and significant disjunctions with those populations in Bears Ears, Chaco Canyon, and Mesa Verde sites.

Conclusions

Movement of tubers from the Mogollon region may have occurred many times and in multiple directions during the past, resulting in the complex genetic patterns seen in populations from across the Four Corners region.

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来源期刊
American Journal of Botany
American Journal of Botany 生物-植物科学
CiteScore
4.90
自引率
6.70%
发文量
171
审稿时长
3 months
期刊介绍: The American Journal of Botany (AJB), the flagship journal of the Botanical Society of America (BSA), publishes peer-reviewed, innovative, significant research of interest to a wide audience of plant scientists in all areas of plant biology (structure, function, development, diversity, genetics, evolution, systematics), all levels of organization (molecular to ecosystem), and all plant groups and allied organisms (cyanobacteria, algae, fungi, and lichens). AJB requires authors to frame their research questions and discuss their results in terms of major questions of plant biology. In general, papers that are too narrowly focused, purely descriptive, natural history, broad surveys, or that contain only preliminary data will not be considered.
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