[Cytogenetic studies of hybridization in wild boars (Sus scrofa ferus) and domestic swine (Sus scrofa dom.)]. / Uwagi na temat badan cytogenetycznych nad krzyzówka dzika (Sus scrofa ferus) i swini domowej (Sus scrofa dom.).

In cytogenetic studies on 2 domestic sows (male) crossed with a wild boar (female) karyotype 2n = 37,XX was found. The localization of G brands permitted to confirm that the submetacentric chromosome in in the hybrids inherited from the European wild boar corresponds to 2 acrocentric chromosomes of pair 15 and 17 fused by centromeres in the domestic pig. Both sows had regular, 18-day sexual cycles. After covering with the wild boar they become pregnant and gave birth to alive progeny. Polymorphism of chromosomes in Suidae and its relation to the effects of hybridization is discussed.

[Cytogenetic studies of crossing of the wild boar (Sus scrofa ferus) and the domestic pig (Sus scrofa dom.)]. / Uwagi na temat badan cytogenetycznych nad krzyzówka dzika (Sus scrofa ferus) i swini domowej (Sus scrofa dom.).

In cytogenetic studies on 2 domestic sows (male) crossed with a wild boar (female) karyotype 2n = 37, XX was found. The localization of G brands permitted to confirm that the submetacentric chromosome in the hybrids inherited from the European wild boar corresponds to 2 acrocentric chromosomes of pair 15 and 17 fused by centromeres in the domestic pig. Both sows had regular, 18-day sexual cycles. After covering with the wild boar they become pregnant and gave birth to alive progeny. Polymorphism of chromosomes in Suidae and its relation to the effects of hybridization is discussed.

The effects of CBG on the in vitro reduction of 3H-progesterone by liver homogenates and cell suspensions.

The effects of CBG on 3H-progesterone metabolism by ovine, bovine and rat liver homogenates and bovine and rat liver cell suspensions were studied. As a source of CBG served plasma from "estrogenized" women. Same plasma, pretreated at 60 degree for 20 min. served as control. It was found that the amounts of 3H-progesterone remaining after incubation were higher in the presence of CBG, as compared with control incubations, when using the homogenates. No such effect was observed in case of cell suspensions.