Conservation measures for Rosa arvensis Huds. in Flanders (Belgium) based on congruent genetic and phenotypic population differentiation

摘要: Rosa arvensis is a naturally rare and scattered indigenous wild rose species in Flanders, the northern part of Belgium. As case for many light demanding woody this area, it currently threatened by habitat fragmentation destruction due to high human pressure. Recent inventories revealed restricted distribution pattern rose, concentrated mainly two regions south western Flanders. Surprisingly, strong differentiation was observed among natural populations these proximate both an AFLP-based morphological analysis. A common garden experiment indicated partly genetic basis divergence. Additionally, AFLP analysis roses sampled same forested area within one resulted differentiated gene pools. Possible causes can be adaptive divergence, founder effects and/or historical hybridisation with dogroses. Together, congruent morphometric between geographic urges cautious approach conservation programs.