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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
刊名	JOURNAL OF SYSTEMATICS AND EVOLUTION
	2010
卷号	48期号:1页码:58-64
关键词	Anaphalis Dc. Asteraceae Chromosome Number Gnaphalieae Polyploidy Qinghai-tibet Plateau
ISSN号	0529-1526
DOI	10.1111/j.1759-6831.2009.00061.x
文献子类	Article
英文摘要	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.
学科主题	Plant Sciences
WOS关键词	HENGDUAN MOUNTAINS REGION ; RANUNCULACEAE ; SENECIONEAE ; KARYOTYPES ; COMPOSITAE ; UNIFORMITY ; EVOLUTION ; NUMBERS ; FLORA ; GENUS
WOS研究方向	Plant Sciences
语种	英语
WOS记录号	WOS:000274470600004
资助机构	National Natural Science Foundation of China [30770167, 30625004, 40930209]; Ministry of Science and Technology of China [2007FY110100]
公开日期	2011-12-06
内容类型	期刊论文
源URL	[http://ir.kib.ac.cn:8080/handle/151853/2619]
专题	昆明植物研究所_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
推荐引用方式 GB/T 7714	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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