Cultural diversification promotes rapid phenotypic evolution in Xavánte Indians

Hünemeier T.; Gómez-Valdés J.; Ballesteros-Romero M.De Azevedo S.Martínez-Abadías N.Esparza M.Sj?vold T.Bonatto S.L.Salzano F.M.Bortolini M.C.González-José R.

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Cultural diversification promotes rapid phenotypic evolution in Xavánte Indians

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Shifts in social structure and cultural practices can potentially promote unusual combinations of allele frequencies that drive the evolution of genetic and phenotypic novelties during human evolution. These cultural practices act in combination with geographical and linguistic barriers and can promote faster evolutionary changes shaped by gene-culture interactions. However, specific cases indicative of this interaction are scarce. Here we show that quantitative genetic parameters obtained from cephalometric data taken on 1,203 individuals analyzed in combination with genetic, climatic, social, and life-history data belonging to six South Amerindian populations are compatible with a scenario of rapid genetic and phenotypic evolution, probably mediated by cultural shifts. We found that the Xavánte experienced a remarkable pace of evolution: the rate of morphological change is far greater than expected for its time of split from their sister group, the Kayapó, which occurred around 1,500 y ago. We also suggest that this rapid differentiation was possible because of strong social- organization differences. Our results demonstrate how human groups deriving from a recent common ancestor can experience variable paces of phenotypic divergence, probably as a response to different cultural or social determinants. We suggest that assembling composite databases involving cultural and biological data will be of key importance to unravel cases of evolution modulated by the cultural environment.

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《Proceedings of the National Academy of Sciences of the United States of America》 |2012年第1期|73-77|共5页
作者
Hünemeier T.; Gómez-Valdés J.; Ballesteros-Romero M.De Azevedo S.Martínez-Abadías N.Esparza M.Sj?vold T.Bonatto S.L.Salzano F.M.Bortolini M.C.González-José R.;
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作者单位

Departamento de Genética, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, 91501-970 Porto Alegre, Rio Grande do Sul, Brazil;

Departamento de Anatomía, Facultad de Medicina, Universidad Nacional Autónoma de México, Circuito Interior, 04510 DF, Mexico;

Escuela Nacional de Antropología e Historia, Periférico Sur Y Zapote, 14030 DF, MexicoCentro Nacional Patagónico, Consejo Nacional de Investigaciones Científicas Y Técnicas, U9120ACV, Puerto Madryn, ArgentinaDepartment of Anthropology, Pennsylvania State University, University Park, PA 16802, United StatesSecció d'Antropologia, Departament de Biologia Animal, Universitat de Barcelona, 08028 Barcelona, SpainOsteologiska Enheten, Stockholms Universitet, SE-106 91 Stockholm, SwedenFaculdade de Biociências, Pontifícia Universidade Católica do Rio Grande do Sul, 90610-001 Porto Alegre, Rio Grande do Sul, Brazil;

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收录信息美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
中图分类自然科学总论;
关键词
Amerindians; Cultural evolution; Morphology; mtDNA; Multiple factor analysis;

Cultural diversification promotes rapid phenotypic evolution in Xavánte Indians

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