Data for: Invasion history of Lycium ferocissimum in Australia – the impact of admixture on genetic diversity and differentiation

Aim: We investigated the invasion history of Lycium ferocissimum, a spine-covered shrub native to South Africa that has developed into a damaging invasive plant of undisturbed landscapes and pastures across southern and eastern Australia. In addition to identifying the provenance of the Australian plants, we tested for evidence of admixture, and contrasted genetic diversity and structuring across the native and introduced ranges.
Location: Samples were collected across South Africa (24 localities) and Australia (26 localities).
Methods: We used genotyping-by-sequencing (3,130 SNPs across 381 individuals) to assess population genetic structuring in L. ferocissimum across Australia and South Africa. Coalescent analyses were used to explicitly test contrasting invasion scenarios.
Results: Clear geographic genetic structuring was detected across South Africa, with distinct clusters in the Eastern and Western Cape provinces. The L. ferocissimum plants in Australia form their own genetic clus..., Genotyping-by-sequencing dataset for African boxthorn (Lycium ferocissimum) samples from Australia and South Africa., Tassel, STACKS, any R package that can process vcf files (e.g. adgenet, vcftools).