Phylogeography and conservation of Archangiopteris somai hayata and A. itoi shieh based on nucleotide variation of the atpB-rbcL intergenic spacer of chloroplast DNA

Tzen-Yuh Chiang, Y. C. Chiang, C. H. Chou, Y. P. Cheng, W. L. Chiou

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Archangiopteris, a genus of the eusporangiate ferns, is endemic to Southeast Asia. A single population of A. itoi and two populations of A. somai remained threatened in Taiwan due to human overexploitation. This study investigated levels of genetic diversity and phylogeographic pattern based on nucleotide sequences of the atpB-rbcL intergenic spacer of cpDNA. Unexpectedly high levels of genetic variation were detected. A neighbour-joining tree revealed paraphyly at the cpDNA noncoding spacer within each morphologically differentiated Archangiopteris species. Lower levels of cpDNA variation were detected in A. itoi, due to smaller population number and size. No genetic differentiation was detected between populations of A. somai. The short isolation period since the last glaciation may have caused the paraphyly of each population due to the insufficient period for coalescence. Increasing individuals and populations through habitat protection, transplantation, cultures and reintroduction could decrease the threat of their extinction.

Original languageEnglish
Pages (from-to)335-340
Number of pages6
JournalFern Gazette
Volume16
Issue number6-8
Publication statusPublished - 2002 Dec 1

Fingerprint

transplantation
last glaciation
phylogeography
reintroduction
fern
coalescence
intergenic DNA
chloroplast DNA
chloroplast
genetic differentiation
genetic variation
extinction
nucleotides
DNA
habitat
paraphyly
habitat conservation
glaciation
South East Asia
ferns and fern allies

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Plant Science

Cite this

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title = "Phylogeography and conservation of Archangiopteris somai hayata and A. itoi shieh based on nucleotide variation of the atpB-rbcL intergenic spacer of chloroplast DNA",
abstract = "Archangiopteris, a genus of the eusporangiate ferns, is endemic to Southeast Asia. A single population of A. itoi and two populations of A. somai remained threatened in Taiwan due to human overexploitation. This study investigated levels of genetic diversity and phylogeographic pattern based on nucleotide sequences of the atpB-rbcL intergenic spacer of cpDNA. Unexpectedly high levels of genetic variation were detected. A neighbour-joining tree revealed paraphyly at the cpDNA noncoding spacer within each morphologically differentiated Archangiopteris species. Lower levels of cpDNA variation were detected in A. itoi, due to smaller population number and size. No genetic differentiation was detected between populations of A. somai. The short isolation period since the last glaciation may have caused the paraphyly of each population due to the insufficient period for coalescence. Increasing individuals and populations through habitat protection, transplantation, cultures and reintroduction could decrease the threat of their extinction.",
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Phylogeography and conservation of Archangiopteris somai hayata and A. itoi shieh based on nucleotide variation of the atpB-rbcL intergenic spacer of chloroplast DNA. / Chiang, Tzen-Yuh; Chiang, Y. C.; Chou, C. H.; Cheng, Y. P.; Chiou, W. L.

In: Fern Gazette, Vol. 16, No. 6-8, 01.12.2002, p. 335-340.

Research output: Contribution to journalArticle

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AU - Chou, C. H.

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AB - Archangiopteris, a genus of the eusporangiate ferns, is endemic to Southeast Asia. A single population of A. itoi and two populations of A. somai remained threatened in Taiwan due to human overexploitation. This study investigated levels of genetic diversity and phylogeographic pattern based on nucleotide sequences of the atpB-rbcL intergenic spacer of cpDNA. Unexpectedly high levels of genetic variation were detected. A neighbour-joining tree revealed paraphyly at the cpDNA noncoding spacer within each morphologically differentiated Archangiopteris species. Lower levels of cpDNA variation were detected in A. itoi, due to smaller population number and size. No genetic differentiation was detected between populations of A. somai. The short isolation period since the last glaciation may have caused the paraphyly of each population due to the insufficient period for coalescence. Increasing individuals and populations through habitat protection, transplantation, cultures and reintroduction could decrease the threat of their extinction.

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