白菜rDNA及C-(0)t-1DNA的荧光原位杂交及其核型分析  

Fluorescence in situ Hybridization and Karyotyping Analysis of rDNA and C-(0)t-1 DNA in Brassica campestris

作　　者：吴春红[1] 范双莉[2] 王力军[3] 

机构地区：[1]河南理工大学图书馆,河南焦作454000 [2]济源职业技术学院护理系,河南济源459000 [3]中国农业科学院油料作物研究所/油料作物生物学与遗传改良农业部重点实验室,武汉430062

出　　处：《植物生理学报》2014年第8期1216-1222,共7页Plant Physiology Journal

基　　金：国家自然科学基金面上项目(30671312)

摘　　要：以早熟白菜苔为实验材料,从其基因组DNA中分离出C0t-1 DNA并用生物素标记作探针,25S rDNA用地高辛标记作探针,对有丝分裂中期相染色体进行双色荧光原位杂交。每对染色体上均显示出了特定的C0t-1 DNA荧光原位杂交带型,5对染色体上显示出了25S rDNA荧光原位杂交带型。双色荧光原位杂交证实了C0t-1 DNA与25S rDNA二者具有一致的染色体位置特征,表明基于rDNA及C0t-1 DNA的荧光原位杂交核型分析技术,优于目前普遍采用的只基于rDNA的荧光原位杂交核型分析方法。结合C0t-1 DNA与25S rDNA的荧光原位杂交带型和传统的染色体的形态学标记分析方法及白菜已公布的基于rDNA分布的核型分析结果,创建了一个精确的白菜核型。With Brassica campestris cv. Zaoshu baicaitai as experimental material, C0t-1 DNA was isolated from the genomic DNA and labeled with Biotin-Nick as a probe, while 25S rDNA was labeled with DIG-Nick. Fluorescence in situ hybridized to the mitotic metaphase chromosomes of B. campestris showed the specific fluorescence bands of C0t-1 rDNA on each chromosome pair. However, the specific fluorescence bands of 25S rDNA were detected on 5 chromosome pairs. The dual fluorescence in situ hybridization confirmed the C0t-1 DNA and rDNA had identical chromosome sites. And also the karyotyping technique based on a combination of rDNA and C0t-1 DNA chromosome landmarks was superior to alone one. Based on a combination of rDNA sites, C0t-1 DNA fluorescent bands, chromosome lengths and arm ratios, a more exact karyotype idiogram of B. campestris was described.

关 键 词：白菜 RDNA C0T-1 DNA 荧光原位杂交 核型分析 

分 类 号：S634.3[农业科学—蔬菜学] Q943[农业科学—园艺学]