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Takada, S. et al.

Takada, Ota, Kansaku, Yamashita, Izumi, Ishikawa, Wada, Kaneda, Choi, Koinuma, Fujiwara, Aoki, Kisanuki, Yamashita, Mano,

Nucleotide sequence and embryonic expression of quail and duck Sox9 genes.

Sox9 is a member of the Sry-type HMG-box (Sox) gene family. It encodes a transcription factor and is thought to be important for sexual differentiation in chicken. In the present study we have isolated Sox9 cDNAs from quail and duck, and examined the expression patterns of the corresponding genes in early embryonic gonads by whole-mount in situ hybridization. We developed a polymerase chain reaction-based protocol to identify the sex of quail and duck embryos before its morphological manifestation. Sox9 expression was first detected on days 5 and 7 in the gonads of male quail and duck embryos, respectively, and was not apparent in female gonads at these stages. These expression patterns are similar to that of chicken Sox9. Our results thus suggest that the expression of quail and duck Sox9 is associated with testis differentiation.[1]

References

Nucleotide sequence and embryonic expression of quail and duck Sox9 genes. Takada, S., Ota, J., Kansaku, N., Yamashita, H., Izumi, T., Ishikawa, M., Wada, T., Kaneda, R., Choi, Y.L., Koinuma, K., Fujiwara, S., Aoki, H., Kisanuki, H., Yamashita, Y., Mano, H. Gen. Comp. Endocrinol. (2006) [Pubmed]

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