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Polyploidy and new chromosome counts in Anaphalis (Asteraceae: Gnaphalieae) from the Qinghai-Tibet Plateau of China
Meng, Ying1,2; Sun, Hang1; Yang, Yong-Ping1,2; Nie, Ze-Long1
2010
发表期刊JOURNAL OF SYSTEMATICS AND EVOLUTION
ISSN0529-1526
卷号48期号:1页码:58-64
摘要Anaphalis is one of the largest genera of the Asian Gnaphalieae (Asteraceae) and is most diversified on the Qinghai-Tibet Plateau. The chromosome numbers and karyomorphology of six species from seven populations were investigated for the first time for this region. Chromosome numbers have been newly documented for four species: Anaphalis deserti (2n = 56 = 24 median [m] + 24 submedian [sm] + 8 acrocentric [st]); Anaphalis plicata (2n = 56 = 26m + 30sm); Anaphalis xylorhiza (2n = 28 = 2 median point [M] + 14m + 12sm); and Anaphalis rhododactyla (2n = 56 = 32m + 24sm). Two further counts are in agreement with the previously reported numbers, that is, Anaphalis royleana (2n = 28 = 4M + 6m + 18sm) and Anaphalis margaritacea (2n = 28 = 12m + 16sm). A new polyploid cytotype (2n = 56 = 26m + 30sm) was found in the Zougong population of A. margaritacea. Polyploidy is for the first time reported for Anaphalis, with four out of seven counts being tetraploid. Our cytological results suggest that polyploids might have played an important role in the evolution of Anaphalis on the Qinghai-Tibet Plateau.; Anaphalis is one of the largest genera of the Asian Gnaphalieae (Asteraceae) and is most diversified on the Qinghai-Tibet Plateau. The chromosome numbers and karyomorphology of six species from seven populations were investigated for the first time for this region. Chromosome numbers have been newly documented for four species: Anaphalis deserti (2n = 56 = 24 median [m] + 24 submedian [sm] + 8 acrocentric [st]); Anaphalis plicata (2n = 56 = 26m + 30sm); Anaphalis xylorhiza (2n = 28 = 2 median point [M] + 14m + 12sm); and Anaphalis rhododactyla (2n = 56 = 32m + 24sm). Two further counts are in agreement with the previously reported numbers, that is, Anaphalis royleana (2n = 28 = 4M + 6m + 18sm) and Anaphalis margaritacea (2n = 28 = 12m + 16sm). A new polyploid cytotype (2n = 56 = 26m + 30sm) was found in the Zougong population of A. margaritacea. Polyploidy is for the first time reported for Anaphalis, with four out of seven counts being tetraploid. Our cytological results suggest that polyploids might have played an important role in the evolution of Anaphalis on the Qinghai-Tibet Plateau.
关键词Anaphalis Dc. Asteraceae Chromosome Number Gnaphalieae Polyploidy Qinghai-tibet Plateau
资助信息National Natural Science Foundation of China [30770167, 30625004, 40930209]; Ministry of Science and Technology of China [2007FY110100]
学科领域Plant Sciences
DOI10.1111/j.1759-6831.2009.00061.x
收录类别SCI
语种英语
WOS研究方向Plant Sciences
WOS类目Plant Sciences
WOS记录号WOS:000274470600004
引用统计
被引频次:9[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.kib.ac.cn/handle/151853/2619
专题中国科学院青藏高原研究所昆明部
作者单位1.Chinese Acad Sci, Kunming Inst Bot, Lab Biodivers & Biogeog, Kunming 650204, Peoples R China
2.Chinese Acad Sci, Inst Tibetan Plateau Res Kunming, Kunming 650204, Peoples R China
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Meng, Ying,Sun, Hang,Yang, Yong-Ping,et al. Polyploidy and new chromosome counts in Anaphalis (Asteraceae: Gnaphalieae) from the Qinghai-Tibet Plateau of China[J]. JOURNAL OF SYSTEMATICS AND EVOLUTION,2010,48(1):58-64.
APA Meng, Ying,Sun, Hang,Yang, Yong-Ping,&Nie, Ze-Long.(2010).Polyploidy and new chromosome counts in Anaphalis (Asteraceae: Gnaphalieae) from the Qinghai-Tibet Plateau of China.JOURNAL OF SYSTEMATICS AND EVOLUTION,48(1),58-64.
MLA Meng, Ying,et al."Polyploidy and new chromosome counts in Anaphalis (Asteraceae: Gnaphalieae) from the Qinghai-Tibet Plateau of China".JOURNAL OF SYSTEMATICS AND EVOLUTION 48.1(2010):58-64.
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