Chloroplast DNA-relationship in palaeoaustralLopidium concinnum (Hypopterygiaceae, Musci). An example of stenoevolution in mosses Studies in austral temperate rain forest bryophytes 2 |
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Authors: | Wolfgang Frey Michael Stech Kathrin Meissner |
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Institution: | (1) Institut für Systematische Botanik und Pflanzengeographie, Altensteinstrasse 6, D-14195 Berlin, Germany |
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Abstract: | Evolutionary relationship between disjunct populations of the palaeoaustral moss taxonLopidium concinnum (Hypopterygiaceae) from New Zealand and southern South America were studied using non-coding chloroplast DNA sequences. No or only slight changes could be observed within the sequences oftrnTUGU —trnLUAA 5exon intergenic spacer,trnLUAA intron andtrnLUAA 3exon —trnFGAA intergenic spacer. This indicates nearly no genetic divergence between extant New Zealand and Chilean populations, i.e. no significant differing pathways of evolution within the 80–60 million years of disrupted areas with interrupted gene flow. Molecular data support the idea of an old Gondwanan relict species of stenoevolutionary character. Ecological data on short-range dispersal strengthen this assessment. |
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Keywords: | Musci Hypopterygiaceae Lopidium concinnum Palaeoaustral taxon genetic similarity chloroplast DNA trnTUGU — trnLUAA intergenic spacer trnLUAA intron trnLUAA — trnFGAA intergenic spacer non-coding region stenoevolutionary taxon |
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