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Position: Home > Articles > Karyotype of Four Species in Genus Dioscorea Journal of Yunnan Agricultural University(Natural Science) 2012,27 (1) 7-13+28

4种薯蓣属植物的核型分析

作  者:
黄贤兰;郭华春
单  位:
云南农业大学薯类作物研究所
关键词:
薯蓣属;染色体;核型;多倍体
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。
译  名:
Karyotype of Four Species in Genus Dioscorea
作  者:
HUANG Xian-lan,GUO Hua-chun(Institute of Root and Tuber Crops,Yunnan Agricultural University,Kunming 650201,China)
关键词:
Dioscorea;chromosome;karyotype;polyploid
摘  要:
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 karyotypic 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.

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