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.
方法:在此,通过对25个考古和非考古种群进行采样,使用遗传测序(GBS)数据进一步检查了这种具有文化意义的物种的驯化假设。
结果:来自犹他州的考古人口,科罗拉多州和亚利桑那州北部的多态位点水平较低,独特的等位基因,和杂合性比来自亚利桑那州中部和新墨西哥州Mogollon地区的非考古人口。主成分分析,Fst值,和结构分析显示,考古种群之间的遗传关系与地理接近度不对应。埃斯卡兰特的人口,犹他州与MogollonRim(向南400公里)上的人有关,并且与熊耳中的那些人口有多种起源和明显的分离,查科峡谷,和梅萨维地。
结论:在过去,来自Mogollon地区的块茎运动可能发生过多次,并且在多个方向上,导致在四角地区的种群中看到复杂的遗传模式。