Using molecular and quantitative variation for assessing genetic impacts on Nucella lapillus populations after local extinction and recolonization  

作　　者：Isabelle Colson Jorge Guerra-Varela Roger NHughes Emilio Rolán-Alvarez 

机构地区：[1]School of Biological Sciences,University of Wales,Bangor,UK [2]Faculty of Biology,University of Vigo,Vigo,Spain

出　　处：《Integrative Zoology》2006年第2期104-107,共4页整合动物学（英文版）

基　　金：funded by the European Union (EUMAR project,grant number EVK3-CT-2001-00048);the Minesterio de Cienciay Tecnología (VEM2003-20047).

摘　　要：The dogwhelk Nucella lapillus is a predatory marine gastropod living on rocky shores in the North Atlantic.As with many other gastropod species,Nucella was affected by tributyltin(TBT)pollution during the 1970s and 1980s,and local populations underwent extinction.After a partial ban on TBT in the UK in 1987,vacant sites have been recolonized.Levels of genetic diversity and quantitative genetic variation in shell form were compared between recolonized sites and sites that showed continuous population at three localities across the British Isles.Overall,estimates of genetic diversity were only slightly lower in recolonized populations,suggesting that populations have recovered from previous impacts due to the relatively high levels of migration from non-impacted sites.Molecular and quantitative analyses are broadly concordant and a positive correlation was observed(although not statistically significant)between molecular and quantitative estimates of genetic diversity,indicating the potential usefulness of quantitative methods to complement molecular population genetics analyses.

关 键 词：additive variation EXTINCTION genetic diversity HERITABILITY Nucella lapillus 

分 类 号：O17[理学—数学]