Chromosome numbers and polyploidy in Leontopodium (Asteraceae: Gnaphalieae) from the Qinghai-Tibet Plateau of S.W. China

被引：13
|
作者：
Meng, Ying [1 ,2 ]
Nie, Ze-Long [1 ]
Sun, Hang [1 ]
Yang, Yong-Ping [1 ,2 ]
机构：
[1] Chinese Acad Sci, Kunming Inst Bot, Key Lab Biodivers & Biogeog, Kunming 650204, Yunnan, Peoples R China
[2] Chinese Acad Sci, Inst Tibetan Plateau Res Kunming, Kunming 650204, Yunnan, Peoples R China
来源：
CARYOLOGIA | 2012年 / 65卷 / 02期
基金：
中国国家自然科学基金;
关键词：
chromosome number; Gnaphalieae; Leontopodium; polyploidy; Qinghai-Tibet Plateau; GENUS COUSINIA ASTERACEAE; PHYLOGENETIC-RELATIONSHIPS; MOLECULAR SYSTEMATICS; ARTEMISIA L; COUNTS; ANTHEMIDEAE; EVOLUTION; GENERA;
D O I：
10.1080/00087114.2012.709779
中图分类号：
Q94 [植物学];
学科分类号：
071001 ;
摘要：
Leontopodium R. Br. ex Cass. is the second largest genus within the Asian Gnaphalieae (Asteraceae) and is most diversified on the Qinghai-Tibet Plateau and its adjacent areas of SW China. The chromosome numbers and karyomorphology of five species from this region were investigated for the first time: Leontopodium sinense (2n = 28 = 22m + 6sm), L. muscoides (2n = 24 = 22m + 2sm), L. souliei (2n = 52 = 32m + 20sm), L. pusillum (2n = 72 = 52m + 20sm), and L. nanum (2n = 48 = 24m + 24sm). The results suggest that the basic chromosome number of Leontopodium is x = 14, followed with dysploidy numbers (e.g. x = 12, 13). Polyploidization has also played an important role in the evolution of Leontopodium in this region.
引用
收藏
页码：87 / 93
页数：7
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