A sea water barrier to coral gene flow.ppt

MOLECULAR ECOLOGY MOLECULAR ECOLOGY MOLECULAR ECOLOGY A sea water barrier to coral gene flow A sea water barrier to coral gene flow (2012)21,5390-5392 (2012)21,5390-5392 王华王华李海宏李海宏谢展望谢展望余晓云余晓云俞盼盼俞盼盼张思梦张思梦王喻王喻 Abstract ? 5000km of uninterrupted deep-water stretch known as the ‘ Eastern pacific barrier ’? A small minority of species are known to straddle the Eastern pacific barrier ? One such exception is the scleractinian coral Porites lobata ??(is this ture ?) Abstract ? Are eastern and central Paci ?c populations of this coral connected by gene ? ow ?? In this issue of Molecular Ecology, Baums et al. (2012) use micro-satellite data to answer this question. Abstract ? They show that P. lobata populations in the eastern Paci ?c are cut off from ic in? ux from the rest of the Paci ?c . ? Populations within each of the two oceanic regions are ically connected Abstract ? Signi ? cantly , the population in the Clipperton Atoll, the westernmost island in the eastern Paci ?c , ically groups with populations from the central Paci ?c , suggesting that crossing the Eastern Paci ?c Barrier by P. lobata propagules does occasionally occur. How to comfirm ic- speci ?c identity ?(hard work) ? Their morphology often misleads us ? They reproduce asexually through breakage ? their mitochondrial DNA evolves slowly Baums et al. (2012) overcame these problems ? using 12 microsatellite loci, sampled extensively (1264 colonies, 1173 ic individuals) both in the central and in the eastern Paci ?c ? samples collected from Hawaii to Moorea and from Clipperton to Ecuador Clipperton Ecuador Hawaii Moorea So what ’ s the e? ? Populations in the central Paci ?c share few alleles in most loci with those of the eastern Paci ?c.