Low RAPD polymorphism in Archangiopteris itoi, a rare and endemic fern in Taiwan

Tsai Wen Hsu, Shan Juei Moore, Tzen-Yuh Chiang

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Abstract

Archangiopteris itoi, an endemic fern in Taiwan, is under threat due to human disturbance. Based on fossil evidence the origin of Archangiopteris can be dated to the Middle Jurassic Age. Field survey indicated that only eighteen individuals were left in the wild. The population at Lienhwachi, on which the species was named, is now extinct. The genetic variation of the population remaining at Wulai was assessed by RAPD fingerprinting. Of 40 oligo primers, only one revealed polymorphism. Nevertheless, this primer enabled identification of six haplotypes. The low variability within the population is ascribed to the small population size, which was constrained largely due to habitat disturbance. In the small population, genetic drift will have greater effects leading to loss of variation at most loci. In this study, RAPD data indicated that some variation existed within the population, thus suggesting that materials were available for re-establishment of the populations.

Original languageEnglish
Pages (from-to)15-18
Number of pages4
JournalBotanical Bulletin of Academia Sinica
Volume41
Issue number1
Publication statusPublished - 2000 Jan 1

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ferns and fern allies
Taiwan
genetic polymorphism
genetic drift
population genetics
haplotypes
population size
fossils
genetic variation
loci
habitats

All Science Journal Classification (ASJC) codes

  • Plant Science

Cite this

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abstract = "Archangiopteris itoi, an endemic fern in Taiwan, is under threat due to human disturbance. Based on fossil evidence the origin of Archangiopteris can be dated to the Middle Jurassic Age. Field survey indicated that only eighteen individuals were left in the wild. The population at Lienhwachi, on which the species was named, is now extinct. The genetic variation of the population remaining at Wulai was assessed by RAPD fingerprinting. Of 40 oligo primers, only one revealed polymorphism. Nevertheless, this primer enabled identification of six haplotypes. The low variability within the population is ascribed to the small population size, which was constrained largely due to habitat disturbance. In the small population, genetic drift will have greater effects leading to loss of variation at most loci. In this study, RAPD data indicated that some variation existed within the population, thus suggesting that materials were available for re-establishment of the populations.",
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Low RAPD polymorphism in Archangiopteris itoi, a rare and endemic fern in Taiwan. / Hsu, Tsai Wen; Moore, Shan Juei; Chiang, Tzen-Yuh.

In: Botanical Bulletin of Academia Sinica, Vol. 41, No. 1, 01.01.2000, p. 15-18.

Research output: Contribution to journalArticle

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