ISSN:
1615-6110
Keywords:
Hylocomiaceae
;
internal transcribed region 2
;
molecular evolution
;
phylogeny
;
relative rate test
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Nucleotide variation of the internal transcribed spacer 2 region of nuclear ribosomal DNA was used to estimate the phylogeny of the moss family Hylocomiaceae. Both parsimony and neighbour-joining analyses support the monophyly of this family, as well as all seven of the genera within the family.Rhytidium appears as the basal taxon and a North American clade comprisingRhytidiopsis andThelia is indicated. The analyses suggest thatHylocomium s. l., a polyphyletic genus, should be divided into three separate genera. The rate of nucleotide substitutions of the ITS-2 region in the Hylocomiaceae is consistent with the hypothesis of a molecular clock based on a relative rate tests. A nearly constant rate of 6.42 × 10−10 substitutions per site and per year is postulated for the family, a rate close to that of the Winteraceae and slower than that ofLopezia.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00986338
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