TITLE	Chromosome numbers in Rubus (Rosaceae) of Taiwan
AUTHOR	Naohiro Naruhashi Department of Biology, Faculty of Science, Toyama University, Gofuku 3190, Toyama 930-8555, Japan Yoshikane Iwatsubo Department of Biology, Faculty of Science, Toyama University, Gofuku 3190, Toyama 930-8555, Japan Ching-I Peng Institute of Botany, Academia Sinica, Nankang, Taipei 115, Taiwan
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ABSTRACT	Taiwan is rich in species of Rubus (Rosaceae), with 37 species known from an island of only 36,000 km2. Rubus is classified into 12 subgenera worldwide, of which subgenera Chamaebatus (1 species), Malachobatus (16 species) and Idaeobatus (20 species) occur in Taiwan. In this paper, we document the chromosome numbers of all 37 species of Rubus in Taiwan and cite vouchers for all of them. First counts are here reported for 19 of the 37 species. Based on x = 7, Chamaebatus is hexaploid; Malachobatus consists of tetraploids, hexaploids and octoploids; and Idaeobatus is uniformly diploid in Taiwan. Our results indicate that all 20 species of subgenus Idaeobatus in Taiwan have speciated at the diploid level, while the five species of section Sozostili in subgenus Malachobatus have speciated at the tetraploid level.
KEYWORD	Chromosome number; Polyploidy; Rosaceae; Rubus; Taiwan;
ARTICLE INFO	Botanical Bulletin of Academia Sinica, Volume 43 Number 3 July 2002, page 193-201, 9 pages
PUBLISHER	Institute of Plant and Microbial Biology, Academia Sinica, Taipei, Taiwan, Republic of China