Cytogenetics of bisexual/unisexual species ofPoecilia
作者:
L. Sola,
V. Iaselli,
A.R. Rossi,
E. M. Rasch,
PJ. Monaco,
期刊:
Cytogenetic and Genome Research
(Karger Available online 1992)
卷期:
Volume 60,
issue 3-4
页码: 236-240
ISSN:1424-8581
年代: 1992
DOI:10.1159/000133347
出版商: S. Karger AG
数据来源: Karger
摘要:
Chromosomes of the Amazon molly, Poecilia formosa, a unisexual species of hybrid origin, were investigated by C-banding, silver staining, and fluorescent staining with DAPI, quinacrine dihydrochloride, and chromomycin A3. Analysis of heterochromatin distribution indicates that chromosomes similar to the W chromosome of P. latipinna are not present in the unisexual species. Therefore, morphologically differentiated sex chromosomes do not form the basis of the unisexuality in P. formosa. The number and location of nucleolar organizer regions vary in P. formosa and do not correlate well with those of the parental species.
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