Data for Archaeological Central American maize genomes suggest ancient gene flow from South America

BP) from El Gigante rock-shelter, Honduras, that are closely related to ancient and modern maize from South America. Our findings suggest that the second wave of maize brought into South America hybridized with long-established landraces from the first wave, and that some of the resulting newly admixed lineages were then reintroduced to Central America. Direct radiocarbon dates and cob morphological data from the rock-shelter suggest that more productive maize varieties developed between 4,300 and 2,500 cal.

BP. We hypothesize that the influx of maize from South America into Central America may have been an important source of genetic diversity as maize was becoming a staple grain in Central and Mesoamerica.<br><br>Data record consists of data in gzip archives and an accompanying readme file. Methods for genomic data collection, processing, and analysis are described in detail in Kistler et al, 2020 Proc Nat Acad Sci USA.

AIM.pl is a Perl script to calculate ancestry informativeness between two input populations. Used to identify ancestry informative markers. smaltIndex.tar.gz includes compressed files comprising the reference sequence index files used by SMALT. Used in genome size estimation. smaltFastas.tar.gz includes UTE and knobC reference sequence panels used by SMALT in genome size estimation.

FGS reference is previously published, as cited in the publication. Kistler_etAl_2020_PNAS_Maize_SNPs.tar.gz includes plink-formatted single-nucleotide polymorphism (SNP) pseudohaplotypes used in all analyses.