[The genetic mechanism of intersexuality in milk goats of Saanen breed of Xinong].

Intersexual goats of Saanen breed of Xinong at Northwestern Agricultural University were studied in anatomy, histology, cytogenetics and genetics. The different types of intersexuality were seen, ranging from psuedohermaphroditic female to male types, including testicular hypoplastic and sex reverse male. All of them were genetic female type (60, XX), the karyotype, normal, so the intersexual bodies caused by the gene, which located at autosomes, having masculinizing effect, and in homozygote made female turn to male incompletely. It was pointed that intersexuality and polledness were controlled by different genes, the half century standing problem on intersexual inheritance of goats has been solved. The normal: the intersexual = 3:1, but the intersexual came from genetic female, this is a very special segregative ratio.