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  • 1 Huazhong Agricultural University Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education 430070 Wuhan Hubei, P. R. China
  • 2 Wuhan Institute of Animal Husbandry and Veterinary Science 430208 Wuhan Hubei, P. R. China
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Doublesex and mab-3-related transcription factor 1 (Dmrt1) is a Z-linked gene that putatively determines the phenotype of gonads in birds. The sex differential expression of Dmrt1 was examined using wholemount in situ hybridization (WISH) in the urogenital systems during embryogenesis. The results revealed that Dmrt1 showed dimorphic expression in chicken gonads, which increased from day 6.5 to day 10.5. The expression of Dmrt1 in male (ZZ) gonads was not twice as much as in female (ZW) gonads, suggesting the existence of other regulatory mechanisms in addition to Z chromosome dosage effect.

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