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彭泽鲫的分子遗传分析及其与方正银鲫A系的比较 总被引：16，自引：2，他引：16
Genetic homogeneity between Pengze crucian carp and strain A of silver crucian carp was studied by using transferrin,isozyme and RAPD markers.The studied individuals of Pengze crucian carp showed transferring patterns were the same of silver crucian carp A strain while distinct from those of other crucian carp populations.As far as isozyme is concerned,the MDH,LDH and EST are all of the same with only slight differences in SOD between them.The RPAD patterns clearly indicated high homogeneity among 16 individuals (6 sampled from individuals of two years old and the others aged one) from crucian carp of Pengze and 5 individuals from strain A of silver crucain carp.Nearly indentical banding patterns were observed among all individuals.Average genetic distance within all the individuals is only 0.011,suggesting crucian carp of Pengze might possess indentical genetic background with strain A of silver crucian carp. 相似文献
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为探究视黄酸(Retinoic acid, RA)在鱼类精原干细胞(Spermatogonial stem cells, SSC)增殖与分化中的作用,本研究首先以三荧光报告载体pGRY(延伸因子1α启动子驱动组蛋白H2B-绿色荧光融合蛋白、减数分裂联会复合体蛋白3(Scp3)启动子驱动嘌呤霉素红色荧光融合蛋白、精蛋白启动子驱动黄色荧光蛋白)转染青鳉精原干细胞系SG3,获得稳转细胞SG3-pGRY,然后分别在2D与3D培养条件下检测RA信号对其增殖与分化的影响。结果显示,稳转细胞SG3-pGRY的红色荧光可监测细胞内源性Scp3的表达,且细胞仍保持干性及分化潜能,表明其可用于监测细胞分化状态。在2D培养条件下,即在细胞培养板中待细胞生长密度约90%就进行传代培养,RA可显著抑制细胞增殖,其受体α、β、γ泛抑制剂BMS493可促进细胞增殖；第48 h,RA处理可下调细胞多能性相关基因pou5f3、klf4表达,上调减数分裂相关基因dazl表达,但对其他减数分裂相关基因如scp3表达无明显影响；第8 d,处理组及对照组均未能观察到红色荧光,这与已有报道RA处理体外培养小鼠SSC可显著促进Scp3表达,并进入减数分裂I期偶线期的研究结果明显不同。在3D培养条件下,即用96孔球形低吸附微量培养板进行培养,48 h后细胞成球状体聚集生长,RA、 BMS493处理组、对照组在48 h后均观察到明显红色荧光,减数分裂相关基因表达与2D相比显著上调；第8 d与34 d,RA处理组减数分裂相关基因表达均显著高于对照组,而BMS493处理组低于对照组。综上,RA信号可抑制SG3增殖,促进其分化,但不是诱导细胞发生减数分裂的关键分子。本研究不仅为鱼类SSC分化相关研究提供了良好研究模型,而且促进了我们对于RA信号在鱼类SSC增殖与分化中作用的深入认识。 相似文献
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