干旱区生态环境知识资源中心(Arid): Genetic and phenotypic diversity in 2000 years old maize (Zea mays L.) samples from the Tarapaca region, Atacama Desert, Chile

Arid

DOI	10.1371/journal.pone.0210369
	Genetic and phenotypic diversity in 2000 years old maize (Zea mays L.) samples from the Tarapaca region, Atacama Desert, Chile
	Vidal Elgueta, Ale 1; Felipe Hinojosa, Luis 2,3; Fernanda Perez, Maria 1,3; Peralta, Gioconda 4; Uribe Rodriguez, Mauricio 5
通讯作者	Vidal Elgueta, Ale
来源期刊	PLOS ONE
ISSN	1932-6203
出版年	2019
卷号	14 期号:1
英文摘要	The evolution of maize (Zea mays L.) is highly controversial given the discrepancies related to the phenotypic and genetic changes suffered by the species, the incidence of human groups and the times in which these changes occurred. Also, morphological and genetic traits of crops are difficult to evaluate in the absence of fossils macro-botanical remains. In contrast in the Tarapaca region (18-21 degrees S), Atacama Desert of Chile, prehispanic settlements (ca. 2500-400 yr BP) displayed extensive maize agriculture. The presence of archaeological macro-botanical remains of maize provided a unique opportunity to study the evolution of this crop, covering a temporal sequence of at least 2000 years. Thus, in this study, we ask how the morphological and genetic diversity of maize has varied since its introduction during prehispanic times in the Tarapaca region. To answer this, we measured and compared morphological traits of size and shape between archaeological cobs and kernels and 95 ears from landraces. To established genetic diversity eight microsatellite markers (SSR) were analyzed in archaeological and modern kernels. Genetic diversity was estimated by allelic frequency rates, the average number of alleles per locus, observed heterozygosity (Ho) and expected heterozygosity (He). Differences between populations and genetic structure were estimated by fixation index F-ST and STRUCTURE analysis. Our results indicate significant phenotypic differences and genetic distance between archaeological maize and landraces. This result is suggestive of an introduction of new varieties or drastic selective changes in modern times in Tarapaca. Additionally, archaeological maize shows a low genetic diversity and a progressive increase in the size of ears and kernels. These results suggest a human selection during prehispanic times and establish that prehispanic farmers played an important role in maize development. They also provide new clues for understanding the evolutionary history of maize in hyperarid conditions.
类型	Article
语种	英语
国家	Chile
开放获取类型	Green Submitted, Green Published, gold
收录类别	SCI-E ; SSCI
WOS记录号	WOS:000457155600032
WOS关键词	POPULATION-STRUCTURE ; NORTHERN CHILE ; HYPERARID CORE ; SELECTION ; DOMESTICATION ; INSIGHTS ; AGRICULTURE ; VARIABILITY ; LANDRACES ; PATTERNS
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/218078
作者单位	1.Pontificia Univ Catolica Chile, Dept Ecol, Santiago, Chile; 2.Univ Chile, Fac Ciencias Biol, Lab Paleoecol, Santiago, Chile; 3.IEB, Santiago, Chile; 4.Pontificia Univ Catolica Chile, Fac Ciencias Biol, Santiago, Chile; 5.Univ Chile, Fac Ciencias Sociales, Dept Antropol, Santiago, Chile
推荐引用方式 GB/T 7714	Vidal Elgueta, Ale,Felipe Hinojosa, Luis,Fernanda Perez, Maria,et al. Genetic and phenotypic diversity in 2000 years old maize (Zea mays L.) samples from the Tarapaca region, Atacama Desert, Chile[J],2019,14(1).
APA	Vidal Elgueta, Ale,Felipe Hinojosa, Luis,Fernanda Perez, Maria,Peralta, Gioconda,&Uribe Rodriguez, Mauricio.(2019).Genetic and phenotypic diversity in 2000 years old maize (Zea mays L.) samples from the Tarapaca region, Atacama Desert, Chile.PLOS ONE,14(1).
MLA	Vidal Elgueta, Ale,et al."Genetic and phenotypic diversity in 2000 years old maize (Zea mays L.) samples from the Tarapaca region, Atacama Desert, Chile".PLOS ONE 14.1(2019).