Invasion of diverse habitats by few Japanese knotweed genotypes is correlated with epigenetic differentiation

• DOI: 10.1111/j.1461-0248.2012.01824.x
• Publication Date: 2012-06-26T14:30:32Z
• Authors: Christina L. Rich...; Aaron W. Schrey; Massimo Pigliucci
• Keywords: Local adaptation

Abstract The expansion of invasive species challenges our understanding the process adaptation. Given that invasion often entails population bottlenecks, it is surprising many invasives appear to thrive even with low levels sequence‐based genetic variation. Using Amplified Fragment Length Polymorphism ( AFLP ) and methylation sensitive‐AFLP MS ‐ markers, we tested hypothesis differentiation Japanese knotweed in response new habitats more correlated epigenetic variation than DNA sequence We found relatively little present was differentiated among species, less sites within species. In contrast, a great deal each evidence some loci may respond local microhabitat conditions. Our findings indicate effects could contribute phenotypic genetically depauperate populations. Deciphering whether differences patterns are cause or effect habitat will require manipulative studies.