Gynogenesis and triploidy in the viviparous fish Poeciliopsis.
Three all-female strains of the viviparous fish Poeciliopsis occur in the Río Fuerte of Sinaloa, Mexico. Poeciliopsis lucida, a bisexual species, provides sperm for these monosexual forms which I designate as Cx, Cy, and Cz. Form Cy is a triploid that when test-mated to males of various species produces all-female, triploid offspring devoid of paternal characters. Both Cx and Cz are diploid and express characteristics of both parents.
D000818:Animals; D002455:Cell Division; D002875:Chromosomes; D003582:Cytogenetics; D005260:Female; D005399:Fishes; D006824:Hybridization, Genetic; D008297:Male; D012732:Sex Determination Analysis