中国特有植物膀胱豆(豆科)及两个邻近种的染色体数目及核型报道

Chromosome Numbers and Karyotypes of Colutea delavayi (Leguminosae) Endemic to China and Two Adjacent Species

对中国特有植物膀胱豆(Colutea delavayi)及两个邻近种鱼鳔槐(C.arborescens)和东方鱼鳔槐(C.orientalis)进行了核形态学研究。膀胱豆核型公式为:2n=2x=16=16m;东方鱼鳔槐核型公式为:2n=2x=16=12m+4sm;鱼鳔槐核型公式为:2n=2x=16=10m+6sm,染色体数2n=16与前人报道一致。三种植物中,除了鱼鳔槐的核型不对称性为2A型外,另两种的核型不对称性均属于1A型。

Chromosome numbers and karyotypes of three species from Colutea （ Leguminosae）, C. delavayi, C. orien- talis and C. arborescens were studied, of which C. delavayi is an endemic to SW China. C. arborescens 2n=2x= 16= 10m＋6sm with type 2A asymmetry and C. orientalis 2n=2x= 16= 12m＋4sm with type 1A asymmetry, the basic chro- mosome number 2n= 16 is also confirmed. C. delavayi 2n=2x= 16= 16m with type 1A asymmetry was reported firstly.