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

页码：87 / 93

页数：7

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