In order to investigate the effect of low-doseαparticle irradiation on primitive hematopoiesis in zebrafish embryos,the 5hpost fertilization (hpf)dechorionated zebrafish embryos were irradiated at doses of 0,0.425,0.85and 1.7mGy,respectively, by using 241 Am as theαparticle irradiation source,the expressions of primitive hematopoietic markers gata1aand spi1bin the about 14hpf zebrafish embryos were detected by the whole-in-situ hybridization(WISH),and that in the 22hpf zebrafish embryos were analyzed by the real-time fluorescence quantitative...