Open AccessMultiple introgression events and range shifts in S chizocodon ( D iapensiaceae) during the Pleistocene
Author(s) -
Higashi Hiroyuki,
Sakaguchi Shota,
Ikeda Hajime,
Isagi Yuji,
Setoguchi Hiroaki
Publication year - 2013
Publication title -
botanical journal of the linnean society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.872
H-Index - 68
eISSN - 1095-8339
pISSN - 0024-4074
DOI - 10.1111/boj.12074
Subject(s) - introgression , biology , allopatric speciation , phylogeography , range (aeronautics) , amplified fragment length polymorphism , chloroplast dna , evolutionary biology , disjunct , coalescent theory , pleistocene , ecology , population , phylogenetics , genetics , paleontology , genetic diversity , demography , materials science , sociology , gene , composite material
Range shifts during the P leistocene shaped the unique phylogeographical structures of numerous species. Accompanying species migration, sister taxa may have experienced multiple introgression events. Here, we report the signature of introgression events in multiple areas in S chizocodon , herbs endemic to J apan, using amplified fragment length polymorphism ( AFLP ) fingerprinting and plastid DNA haplotyping in 48 populations. Although the present distributions of S . soldanelloides and S . ilicifolius are mainly allopatric, the species share plastid DNA haplotypes in each region (north‐eastern, north‐central, south‐central and south‐western J apan); in contrast, the specific groups were highly supported by AFLP analyses. These results support the occurrence of multiple introgression events in S chizocodon . Notably, the disjunct plastid haplotypes found only in S . ilicifolius var. intercedens suggest complete plastid DNA replacement at local areas from S . soldanelloides into S . ilicifolius var. ilicifolius . Furthermore, we found that S . soldanelloides experienced range contraction and expansion during glacial and interglacial cycles based on mismatch distribution analysis and ecological niche modelling. Based on several pieces of evidence, our study supports the idea that historical range shifts associated with P leistocene climatic oscillations favoured multiple and regional introgression events in Schizocodon . © 2013 The Linnean Society of London, Botanical Journal of the Linnean Society , 2013, 173 , 46–63.