Current evidence allows multiple models for the peopling of the Americas

Potter, Ben A.; Baichtal, James F.; Beaudoin, Alwynne B.; Fehren‐Schmitz, Lars; Haynes, C. Vance; Holliday, Vance T.; Holmes, Charles E.; Ives, John W.; Kelly, Robert L.; Llamas, Bastien; Malhi, Ripan S.; Miller, D. E.; Reich, David; Reuther, Joshua D.; Schiffels, Stephan; Surovell, Todd A.

doi:10.1126/sciadv.aat5473

Cited by 125 publications

(82 citation statements)

References 78 publications

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“…Humans domesticated members of this genus seven times (Gepts et al, 2008;Bitocchi et al, 2017), which are part of the 41 domestications in the Fabaceae (Harlan, 1992). The common bean (Phaseolus vulgaris L.), a dietary staple for hundreds of millions of people worldwide (Singh, 1999;Gepts et al, 2008), diverged into distinct Middle American and Andean gene pools c. 87 000 yr before present (Ariani et al, 2018), well before the first human migrations into the Americas some 16 000-23 000 yr ago (Moreno-Mayar et al, 2018;Potter et al, 2018). It was domesticated independently in Middle America and the Andes, resulting in a replicated experiment in evolution.…”

Section: Introductionmentioning

confidence: 99%

Pod indehiscence is a domestication and aridity resilience trait in common bean

et al. 2019

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Summary Plant domestication has strongly modified crop morphology and development. Nevertheless, many crops continue to display atavistic characteristics that were advantageous to their wild ancestors but are deleterious under cultivation, such as pod dehiscence (PD). Here, we provide the first comprehensive assessment of the inheritance of PD in the common bean (Phaseolus vulgaris), a major domesticated grain legume. Using three methods to evaluate the PD phenotype, we identified multiple, unlinked genetic regions controlling PD in a biparental population and two diversity panels. Subsequently, we assessed patterns of orthology among these loci and those controlling the trait in other species. Our results show that different genes were selected in each domestication and ecogeographic race. A chromosome Pv03 dirigent‐like gene, involved in lignin biosynthesis, showed a base‐pair substitution that is associated with decreased PD. This haplotype may underlie the expansion of Mesoamerican domesticates into northern Mexico, where arid conditions promote PD. The rise in frequency of the decreased‐PD haplotype may be a consequence of the markedly different fitness landscape imposed by domestication. Environmental dependency and genetic redundancy can explain the maintenance of atavistic traits under domestication.

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Section: Introductionmentioning

confidence: 99%

Pod indehiscence is a domestication and aridity resilience trait in common bean

et al. 2019

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“…Braje and colleagues (2017, 2018) recently highlighted progress made in the last 20 years to better understand human adaptations along the Pacific Coast and called for continued efforts to evaluate the viability of the PCR. Some archaeologists (O'Brien 2019; Potter, Baichtal et al 2018; Potter, Beaudoin et al 2018) countered that the IFC route remains the most viable and best understood early dispersal route into the Americas.…”

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confidence: 99%

Fladmark + 40: What Have We Learned about a Potential Pacific Coast Peopling of the Americas?

et al. 2019

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Forty years ago, Knut Fladmark (1979) argued that the Pacific Coast offered a viable alternative to the ice-free corridor model for the initial peopling of the Americas—one of the first to support a “coastal migration theory” that remained marginal for decades. Today, the pre-Clovis occupation at the Monte Verde site is widely accepted, several other pre-Clovis sites are well documented, investigations of terminal Pleistocene subaerial and submerged Pacific Coast landscapes have increased, and multiple lines of evidence are helping decode the nature of early human dispersals into the Americas. Misconceptions remain, however, about the state of knowledge, productivity, and deglaciation chronology of Pleistocene coastlines and possible technological connections around the Pacific Rim. We review current evidence for several significant clusters of early Pacific Coast archaeological sites in North and South America that include sites as old or older than Clovis. We argue that stemmed points, foliate points, and crescents (lunates) found around the Pacific Rim may corroborate genomic studies that support an early Pacific Coast dispersal route into the Americas. Still, much remains to be learned about the Pleistocene colonization of the Americas, and multiple working hypotheses are warranted.

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“…Archaeological and Paleogenomic evidence together indicate that Beringian settlers originated from northeastern Eurasian populations (Llamas et al, ; Moreno‐Mayar et al, ; Sikora et al, ) and became archaeologically visible during the Bølling‐Allerød Chronoperiod (14,500–12,900 cal B.P. ; Goebel & Buvit, ; Meltzer, ; Potter et al, ). The colonization of Beringia corresponds to the first evidence for recolonization of latitudes above 60°N after the Last Glacial Maximum and set the stage for the colonization of the Americas in the subsequent millennia (Goebel, Waters, & O'Rourke, ; Potter et al, ; Raghavan et al, ).…”

Section: Introductionmentioning

confidence: 99%

“…; Goebel & Buvit, ; Meltzer, ; Potter et al, ). The colonization of Beringia corresponds to the first evidence for recolonization of latitudes above 60°N after the Last Glacial Maximum and set the stage for the colonization of the Americas in the subsequent millennia (Goebel, Waters, & O'Rourke, ; Potter et al, ; Raghavan et al, ).…”

Section: Introductionmentioning

confidence: 99%

Small mammals and paleovironmental context of the terminal pleistocene and early holocene human occupation of central Alaska

et al. 2019

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This paper explores paleoenvironmental and paleoecological information that may be obtained from small‐mammal assemblages recovered at central Alaska archaeological sites dated to the terminal Pleistocene and early Holocene (14,500–8,000 cal B.P.). Small‐mammal remains in these open‐air sites are primarily related to deposition by natural death causes and as such provide information on site paleoenvironments and landscape heterogeneity. Their presence within archaeological occupations likely relates to anthropogenic disturbance and features that would have favored burrow construction. The co‐occurrence of small‐mammal remains and archaeological occupations provides a chronological framework of presence in the locality for most recorded small‐mammal species. Small‐mammal remains document faunal turnover between Pleistocene and Holocene communities. The near‐contemporaneity of species that strongly differ in their ecological requirements suggest that the terminal Pleistocene and early Holocene in central Alaska was a period of dynamic change that may have been characterized by patchy vegetation distribution, rather than the climax communities seen today. In addition to the biogeographical value of small‐mammal remains the paleoenvironmental information that they provide help to characterize the ecology of early human settlers in the region and the processes behind human dispersal in Beringia and the Americas at the end of the Ice Age.

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Current evidence allows multiple models for the peopling of the Americas

Abstract: Current genetic and archeological evidence allows for inland, coastal, or multiple pathways to peopling of the Americas.

Cited by 125 publications

References 78 publications

Pod indehiscence is a domestication and aridity resilience trait in common bean

Pod indehiscence is a domestication and aridity resilience trait in common bean

Fladmark + 40: What Have We Learned about a Potential Pacific Coast Peopling of the Americas?

Small mammals and paleovironmental context of the terminal pleistocene and early holocene human occupation of central Alaska

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