摘要
采用染色体压片技术对薯蓣属(Dioscorea)4种植物进行核型研究。结果显示小花盾叶薯蓣(D.parviflora C.T.Ting)的染色体数目为2n=2x=20,核型公式K(2n)=20=8m+12sm;盾叶薯蓣(野生种)(D.zingiberensis C.H Wright)的染色体数目为2n=2x=20,核型公式K(2n)=20=14m+6sm;盾叶薯蓣(D.zingiberensis C.H Wright)栽培株系A-02-6的染色体数目为2n=4x=40,核型公式K(2n)=40=20m+18sm+2st;黄独(D.bulbifera L.)的染色体数目为2n=8x=80,核型公式K(2n)=80=34m+46sm;山药(薯蓣D.opposita Thunb)的染色体数目为2n=14x+4=144,核型公式K(2n)=144=57m+84sm+3st。结果表明:薯蓣属是染色体数目和倍性复杂并且存在许多多倍体的植物群,核型上也存在一定差异。
The chromosome number and karyotype of four species in genus Dioscorea were studied. The results showed that the chromosome number of D. parviflora C. T. Ting is 20 and its karyotypic formula is 2n = 20 = 8m ＋ 12sm; the chromosome number of D. zingiberensis C. H Wright （wild） is 20 and its karyotypic formula is 2n = 20 = 14m ＋ 6sm; the chromosome number of D. zingiberensis C. H Wright （ the cultivated lines A - 02 - 6 ） is 40 and its karyotypie formula is 2n = 40 = 20m ＋ 18sm ＋ 2st ; the chromosome number of D. bulbifera L. is 80 and its karyotypic formula is 2n = 80 = 34m ＋ 46sm; the chromosome number of D. opposita Thunb is 144 and its karyotypic formula is 2n = 144 = 57m ＋ 84sm ＋3st. The results indicated that chromosome number and ploidy were complicated in genus Dioscorea which had many polyploid. There were certain differences among the karyotypes of these four species in genus Dioscorea.
出处
《云南农业大学学报（自然科学版）》
CAS
CSCD
北大核心
2012年第1期7-13,28,共8页
Journal of Yunnan Agricultural University:Natural Science
基金
中药现代化研究专项(2002ZY-2)
关键词
薯蓣属
染色体
核型
多倍体
Dioscorea
chromosome
karyotype
polyploid
