Racemiflorae_Nuclear_STRUCTURE

Input file for STRUCTURE of nuclear microsatellites for 49 populations of Quercus section Lobatae subsection Racemiflorae

Racemiflorae_Chloroplast_GENEPOP

Chloroplast microsatellite data in GENEPOP format for 49 populations of Quercus section Lobatae subsection Racemiflorae

Racemiflorae_Nuclear_GENEPOP

Nuclear microsatellite data in GENEPOP format for 49 populations of Quercus section Lobatae subsection Racemiflorae

Racemiflorae_Chloroplast_ARLEQUIN

Chloroplast microsatellite data in ARLEQUIN format for 49 populations of Quercus section Lobatae subsection Racemiflorae

Data from: Species diversification in a lineage of Mexican red oak (Quercus section Lobatae subsection Racemiflorae)—the interplay between distance, habitat, and hybridization

In widespread taxa in which hybridization is suspected of being an important aspect of species biology, the patterns and drivers of lineage diversification are not always clear. Here, we examine the patterns of species diversification in a monophyletic lineage of oaks endemic to western Mexico, a center of global oak diversity. This group of four species inhabits a variety of soil types and exhibits varying patterns of species distribution ranging from widespread to restricted, with the range bisected by the Trans-Mexican Volcanic Belt (TVB). Using chloroplast and nuclear microsatellites, we evaluated genetic diversity, diversification, and genetic group assignment across 49 populations. Chloroplast data identified 29 haplotypes in three distinct lineages, many of these found occurring on opposite sides of the TVB. Individual species were only loosely associated to specific chloroplast haplotypes but the distribution of shared haplotypes supports a one-time wider distribution. One lineage was highly divergent and geographically isolated, likely representing a case of chloroplast capture via hybridization and may indicate a range expansion of Racemiflorae into new territory. Nuclear gene diversity varied little across species and populations; however, differentiation and genetic assignment analysis was strongly structured geographically and tended to cluster with broad soil types. Soil specialist taxa produced homogeneous genetic structure while soil generalists showed varying patterns of mixed ancestry and high levels of admixture. Speciation appears driven by a combination of distance and edaphic factors leading to drift. Hybridization appears to be complementary, occurring most often in non-specific soil environments and in marginal areas, and contributes to a long-scale pattern of gene exchange as species ranges fluctuate with time

Racemiflorae_Chloroplast_GENALEX

Chloropast microsatellite data in GENALEX format for 49 populations of Quercus section Lobatae subsection Racemiflorae

Racemiflorae_Chloroplast_CPssr input

Input file for CPssr software. Chloroplast microsatellite haplotype data for 49 populations of Quercus section Lobatae subsection Racemiflorae

Racemiflorae_Nuclear_GENALEX

Nuclear microsatellite data in GENALEX format for 49 populations of Quercus section Lobatae subsection Racemiflorae