| molecular biodiversity and population structure in common ash (fraxinus excelsior l.) in britain: implications for conservation. | current forestry policy promotes the use of local seed for new plantings, on the assumption that local material may be better adapted to local conditions. however, landscape-scale genetic studies which are necessary to underpin conservation and breeding strategies are often lacking. we investigated molecular diversity in common ash (fraxinus excelsior l.) sampled from 42 british and six french sites with microsatellites. chloroplast haplotype h04 was the most common and widespread in britain, al ... | 2010 | 20465580 |