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Chloroplast DNA-relationship in palaeoaustralLopidium concinnum (Hypopterygiaceae, Musci). An example of stenoevolution in mosses Studies in austral temperate rain forest bryophytes 2

Author:
Frey, Wolfgang, Stech, Michael, Meissner, Kathrin
Source:
Plant systematics and evolution 1999 v.218 no.1-2 pp. 67-75
ISSN:
0378-2697
Subject:
Bryopsida, chloroplast DNA, chloroplasts, gene flow, genetic variation, intergenic DNA, introns, mosses and liverworts, population, rain forests, New Zealand, South America
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 5′exon intergenic spacer,trnLUAA intron andtrnLUAA 3′exon —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.
Agid:
4389994