摘要
本文对产于青藏高原地区的11个属12个种植物进行了核型分析。大部份种为首次报道。它们的核型公式和核型不对称性如下:云雾雀儿豆Chesneya nubigena(D.Don)Ali,为2n=16=10m+6sm,属2B型;变色锦鸡儿Caragana vetsicolor Benth.,为2n=18=14m+4sm,2B型;藏北锦鸡儿Caragana gerardiana,2n=18=14m+4sm,2B型;异叶青兰Dracocephalum heterophyllum Benth.,为2n=24;西藏泡囊草Physochlaina praeslta,Kurng & A.M.Lu2n=42=34m+8sm,2A型;洼瓣花Lloydia serotina(L.)Reich.,2n=24=6m+10sm+8st,3B型;高山韭Allium sikkimense Baker,为2n=24=48=38m+6sm+4st,2A型;垫形蒿Artemisia minor Jacq. ex DC.,2n=18=16m+2sm,2A型;弯茎还阳参Crepis flexuosa(Ledeb.)C.B.Clarke,2n=14=12m+2sm,2A型;西藏微孔草Microula tibetica Benth.,2n=24;高原芥Christolea crassifolia Camb.,2n=14=6m+6sm+2st,2A型;卷叶黄精Polygonatum cirrhifolium(Wall.)Royal,2n=52=14m+4sm+28st+6st,2B型。
In the present paper, the chromosome of 12 species in 11 genera of 7 famillies from the western Qinghai-Xizang Plateau were inverstigated in order to accumulate cytological data of this very species flora. Most of them are the dominant species to establish the plant communities of this region. Their karyotype formulas, and karyotype asymmtry following Stebbins's classification, are shown as follows: Chesneya nubigena (D.Don)Ali, 2n=16= 10m+ 6sm, 2B; Caragana versicolor Benth., 2n= 18= 14m+4sm, 2B; Caragana gerdrdiana, 2n = 18= 14m+4sm,2B;Dracocephalum heterophyllum Benth., 2n = 24i Physochlaina praeslta,Kuang & A.M.Lu 2n = 42 = 34m+8sm, 2A; Lloydia serotina(L.) Reich.,2n = 24 = 6m+ 10sm+8st, 3B; Allium sikkimense Baker, 2n = 24 = 48 = 38m+6sm+4st,2Ai Artemisia minor Jacq. ex DC., 2n=18=16m+2sm, 2A; Crepis flexuosa (Ledeb.)C.B.Clarke, 2n= 14= 12m+2sm, 2A; Microula tibetica Benth., 2n = 24; Christolea crassifolia Camb., 2n= 14=6m+6sm+2st, 2A; Polygonatum cirrhifolium (Wall.)Royal, 2n = 52 = 14m+4sm+28st+6t, 2B. From the above results it can be seenall the other species studiedhere are diploids except 3 ones (A. sikkimense, P. cirrifolium and P. praealta)being polyploida, which suggests diploid might prevails in the dominant species of the western Qihai-Xizang Plateau. Certain it is the species studied are too few to reach a final conclusion and further studies must be made.
出处
《云南植物研究》
CSCD
1993年第4期377-384,共8页
Acta Botanica Yunnanica
关键词
青藏高原
种子植物
染色体组型
Qinghai-Xizang
Chesneya nubigena
Caragana versicolor
Caragana gerardiana
Dracocephalum heterophyllum
Physochlaina praeslta
Lloydia serotina
Allium sikkimense
Artemisia minor
Crepis flexuosa
Microula tibetica
Christolea crassifolia
