title: Cytogenetics of bisexual/unisexual species of Poecilia. I. C-bands, Ag-NOR polymorphisms, and sex chromosomes in three populations of Poecilia latipinna.
abstract: Three populations of the North American cyprinodont fish Poecilia latipinna, considered to be one of the progenitor species of the gynogenetic unisexual P. formosa, were analyzed by C-banding and Ag-staining. C-bands were found to be polymorphic, and Ag-staining showed a high degree of variability in both the number and location of nucleolus organizer regions. The C-banding and Ag-staining patterns allow, to a certain extent, to distinguish individual specimens from each of these populations. Females of the three populations were found to have a heteromorphic chromosome pair, which was frequently identifiable with Giemsa staining and always after C-banding. This pair could be interpreted as sex chromosomes of the ZW/ZZ type.
authors.affiliation: Dipartimento di Biologia Animale e dell'Uomo, Università di Roma La Sapienza, Italy.
authors.forename: L
authors.initials: L
authors.lastname: Sola
authors.forename: P J
authors.initials: PJ
authors.lastname: Monaco
authors.forename: E M
authors.initials: EM
authors.lastname: Rasch
mesh_terms: D000818:Animals; D002871:Chromosome Banding; D003532:Cyprinodontiformes / Q000235:genetics*; D003582:Cytogenetics; D005260:Female; D007621:Karyotyping; D008297:Male; D009697:Nucleolus Organizer Region; D011036:Poecilia / Q000235:genetics*; D011110:Polymorphism, Genetic; D012730:Sex Chromosomes