| 4种薯蓣属植物的核型分析 |
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| 引用本文： | 黄贤兰,郭华春.4种薯蓣属植物的核型分析[J].云南农业大学学报,2012,27(1):7-14. |
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| 作者姓名： | 黄贤兰 郭华春 |
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| 作者单位： | 云南农业大学 薯类作物研究所，云南 昆明 650201 |
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| 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(Dparviflora CTTing)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)(Dzingiberensis CH Wright)的染色体数目为2n=2x=20，核型公式K(2n)=20=14m+6sm；盾叶薯蓣(Dzingiberensis CH 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(Dbulbifera L)的染色体数目为2n=8x=80，核型公式K(2n）=80=34m +46sm；山药(薯蓣Dopposita 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。
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| 关 键 词： | 薯蓣属 染色体 核型 多倍体 |
Karyotype of Four Species in Genus Dioscorea |
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| HUANG Xian-lan,GUO Hua-chun.Karyotype of Four Species in Genus Dioscorea[J].Journal of Yunnan Agricultural University,2012,27(1):7-14. |
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| Authors: | HUANG Xian-lan GUO Hua-chun |
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| Institution: | Institute of Root and Tuber Crops， Yunnan Agricultural University，Kunming 650201,China |
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| Abstract: | The chromosome number and karyotype of four species in genus Dioscorea were studied．The results showed that the chromosome number of Dparviflora CTTing is 20 and its karyotypic formula is 2n=20=8m+12sm; the chromosome number of Dzingiberensis CH Wright (wild) is 20 and its karyotypic formula is 2n=20=14m+6sm；the chromosome number of Dzingiberensis CH Wright (the cultivated lines A-02-6) is 40 and its karyotypic formula is 2n=40=20m+18sm+2st；the chromosome number of Dbulbifera L is 80 and its karyotypic formula is 2n=80=34m+46sm；the chromosome number of Dopposita 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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| Keywords: | Dioscorea chromosome karyotype polyploid |
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