A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Diversification of lindsaeoid ferns and phylogenetic uncertainty of early polypod relationships
Tekijät: Lehtonen S, Wahlberg N, Christenhusz MJM
Kustantaja: WILEY-BLACKWELL
Julkaisuvuosi: 2012
Journal: Botanical Journal of the Linnean Society
Tietokannassa oleva lehden nimi: BOTANICAL JOURNAL OF THE LINNEAN SOCIETY
Lehden akronyymi: BOT J LINN SOC
Numero sarjassa: 4
Vuosikerta: 170
Numero: 4
Aloitussivu: 489
Lopetussivu: 503
Sivujen määrä: 15
ISSN: 0024-4074
DOI: https://doi.org/10.1111/j.1095-8339.2012.01312.x
Tiivistelmä
We analysed one nuclear gene (18S) and seven plastid markers [five protein coding (atpA, atpB, rbcL, rpoC1, rps4) and two non-coding (trnH-psbA, trnL-trnF] for 31 members of Polypodiales and four outgroup taxa. We focused our sampling on the lindsaeoids and associated ferns in order to obtain a better understanding of the diversification of the early polypods. However, the exact phylogenetic position of Saccoloma and Cystodium remained uncertain. Based on relaxed molecular clock analyses, it appears that the crown group lindsaeoids diversified in the Caenozoic, more or less simultaneously with the main radiation of other Polypodiales, even though the original divergence between the lindsaeoid and non-lindsaeoid polypods occurred before the end of the Jurassic. The current pantropical distribution of lindsaeoids can be explained by either long-distance dispersal across the oceans or vicariance caused by the retreat of previously widely distributed tropical forests from higher to lower latitudes.(C) 2012 The Linnean Society of London, Botanical Journal of the Linnean Society, 2012, 170, 489503.
We analysed one nuclear gene (18S) and seven plastid markers [five protein coding (atpA, atpB, rbcL, rpoC1, rps4) and two non-coding (trnH-psbA, trnL-trnF] for 31 members of Polypodiales and four outgroup taxa. We focused our sampling on the lindsaeoids and associated ferns in order to obtain a better understanding of the diversification of the early polypods. However, the exact phylogenetic position of Saccoloma and Cystodium remained uncertain. Based on relaxed molecular clock analyses, it appears that the crown group lindsaeoids diversified in the Caenozoic, more or less simultaneously with the main radiation of other Polypodiales, even though the original divergence between the lindsaeoid and non-lindsaeoid polypods occurred before the end of the Jurassic. The current pantropical distribution of lindsaeoids can be explained by either long-distance dispersal across the oceans or vicariance caused by the retreat of previously widely distributed tropical forests from higher to lower latitudes.(C) 2012 The Linnean Society of London, Botanical Journal of the Linnean Society, 2012, 170, 489503.
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