Genetic divergence among Mexican populations of red mangrove (Rhizophora mangle): geographic and historic effects

摘要: The Panamanian Isthmus uplifted about 3.5 million years ago, isolating plant and animal populations distributed in what today are the Pacific Atlantic coasts. red mangrove, Rhizophora mangle, is one of those species which gene flow was interrupted by this geological phenomenon. Here, we measure extent genetic divergence among Mexican R. both between within coasts, explore evolutionary processes responsible for their structure. Fourteen mangle were sampled individuals screened multi-locus genotypes using isozymes. We detected a marked differentiation (Fst = 0.287) high inbreeding (Fis 0.428) mangle. Inferred coast (Nm 0.738) lower than that observed 3.174). As indicated low values 0.433), presence alleles restricted to populations, two coasts isolated from each other. Gene does not follow expectation model isolation distance, reflects complex pattern migration populations. loss allele documented northernmost population on coast. Our results suggest drift may have played major role mangrove found study.