小鼠胆固醇性状的核质互作QTL定位研究

Nuclear-cytoplasmic interaction QTL mapping of the lipoprotein and cholesterol traits in mice

目的研究小鼠胆固醇的核质互作效应,定位影响小鼠胆固醇性状的QTL。方法改进业已构建的核质互作分析模型和方法,并对公共数据库的DBA/2J(D2)和CAST/EiJ(CAST)衍生的正反F2群体总胆固醇量及脂蛋白数据进行分析。结果发现了控制小鼠总胆固醇、高密度脂蛋白、非高密度脂蛋白3个性状的6个QTL,分别定位于基因图谱的4个连锁群中,在本研究构建的模型下,发现1个QTL与细胞质背景有显著的交互作用,改变了前人对该数据分析的结果,对于了解小鼠胆固醇量及脂蛋白性状的遗传构成开拓了新的思路。结论小鼠胆固醇性状是核基因与细胞质背景共同作用的结果。

Objective To study the cholesterol nuclear-cytoplasmic interaction effect and position cholesterol traits QTL in mice.Methods Improving the nuclear-cytoplasmic interaction models and methods that have been constructed, and analyzing the public database of total cholesterol and lipoprotein data of F2 group that derived from DBA/2J （ D2） and CAST/EiJ （ CAST） mice.Results Six QTL that controlling total cholesterol, HDL and nonHDL were located in 4 linkage groups in the genome.In the models constructed in this study, we found a QTL has significant interaction with cytoplasmic background, which changes the previous results of data analysis, the genetic mouse cholesterol and lipoprotein components opened up new ideas.Conclusion Mouse cholesterol trait is the result of interaction of nuclear genes and cytoplasmic background.