Yu, Chih-Chieh , Chung, Kuo-Fang .
On the Geographical Origin of Formosan Barberry.
The genus Berberis is one of the representative mountane taxa, consisting of the vegetation of mid to high altitude areas in Taiwan. Most of the Formosan barberries ( except for B. morrisonensis ) are members of Sect. Wallichianae, which as delimited by C.K. Schneider in 1906, is a well-defined natural group of species. As the biogeography of high mountains flora has been attracting botanists’ attentions, the notable high endemicity of Formosan barberries (100%) may make Formosan barberries a good system for understanding the insights of the origin of Taiwan’s high mountain flora. In order to test the hypothesis of the origin of Formosan barberries, the phylogenies of ribosomal ITS region and the aCCD–psaI intergenic spacer of cpDNA were reconstructed. We sampled 28 taxa from Sino-Himalayas, Tibet, Nepal, Buhtan, India, Vietnam and all possible taxa in Taiwan. The phylogenetic trees revealed paraphyly of both loci in the Asian and Taiwanese Sect. Wallichianae barberries. The haplotype networks showed similar results, two loci are also lack of unique derived haplotypes. Incomplete lineage sorting due to historical gene flow, large effective population size and relative long life span of Berberis is likely result in this paraphyly. However, our results still suggest that the hypothesis of single origin of Taiwanese Wallichianae barberries can not be rejected, and indicate a scenario in which the Taiwanese Wallichianae barberries is originated from Sino-Himalayas area. While Taiwanese Wallichianae barberries are not a monophyletic group, the surprisingly morphological diversity among them may imply a recent adaptive radiation that may play a crucial role in the evolution of the Berberis plants of Taiwan.
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1 - National Taiwan University, School of Forestry and Resource Conservation, No. 1, Sec. 4, Roosevelt Road, Taipei, 10617, Taiwan
2 - Institute of Forestry, Forestry and Resource Conservation, No. 1, Sec. 4, Roosevelt Road, Taipei, 10617 Taiwan(R.O.C), Taipei, Taiwan(R.O.C)
Presentation Type: Poster:Posters for Topics
Location: Hall A/Convention Center
Date: Monday, August 2nd, 2010
Time: 5:30 PM