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四种鲍45S rDNA在染色体上的比较定位
Authors
张健鹏
柯才焕
+4 more
游伟伟
王铜毅
蔡明夷
骆轩
Publication date
7 August 2019
Publisher
Abstract
为了研究皱纹盘鲍、西氏鲍、绿鲍和杂色鲍等4种鲍的核型特征,实验利用荧光原位杂交(fluorescence in situ hybridization,,FISH)比较定位了这4种鲍的45S rDNA位点。皱纹盘鲍中,约83%的中期细胞检出2对45S rDNA位点,分别位于13号和16号染色体的长臂端部。西氏鲍中,约75%的中期细胞检出3对45S rDNA位点,分别位于6号染色体短臂端部、14号和17号染色体长臂端部。绿鲍中,约85%的中期细胞检出3对45S rDNA位点,分别位于4号、6号和8号染色体长臂的端部。杂色鲍中,约65%的中期细胞检出3对45S rDNA位点,分别位于3号、4号和12号染色体短臂的端部。此外,4种鲍均有少数中期相的45S rDNA位点数高于众数,这提示除了明确的45S rDNA位点外,4种鲍可能均有若干个不稳定的45S rDNA位点。研究结果丰富了鲍细胞遗传学研究资料,为鲍的遗传育种研究提供了基础数据
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Last time updated on 20/11/2020