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薏苡45S和5SrDNA的染色体定位研究(简报)(英文) 被引量:4

PHYSICAL MAPPING OF THE 45S AND 5S rDNA IN COIX LACRYMA-JOBI L.
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摘要 通过荧光原位杂交的方法确定了45S和5S rDNA序列在薏苡前中期染色体上的位置。尽管具有20条染色体的薏苡是四倍体植物,但它的基因组中只有一个45S和5S rDNA位点。根据薏苡前中期染色体的核型,确定45S rDNA序列位于薏苡第2号染色体短臂上的次级缢痕区和随体上,5S rDNA序列位于第7号染色体长臂靠近着丝粒处,5S rDNA位点到着丝粒的百分距离是29.13±1.76。
出处 《实验生物学报》 CSCD 北大核心 2003年第5期393-396,共4页 Acta Biologiae Experimentalis Sinica
基金 The project was supported by the National Natural Science Foundation of China(No.30070376)
关键词 薏苡 RDNA 荧光原位杂交 染色体 四倍体植物 基因组 着丝粒 C. lacryma-jobi. rDNA. Fluorescence in situ hybridization (FISH)
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