Ploidy Manipulation and Gynogenesis in Fishes: Cytogenetic and Fisheries Applications
- 1 July 1990
- journal article
- Published by Oxford University Press (OUP) in Transactions of the American Fisheries Society
- Vol. 119 (4) , 698-717
- https://doi.org/10.1577/1548-8659(1990)119<0698:pmagif>2.3.co;2
Abstract
Manipulation of fish chromosomes dates back to the early part of this century. The earliest experiments involved induction of gynogenesis with sperm inactivated by radiation or chemical treatments. Temperature or pressure shocks applied soon after fertilization resulted in the retention of the second polar body and reconstitution of diploidy; triploidy resulted from shocks to fish ova fertilized with normal sperm. More recently, it has been possible to suppress the first mitotic division offish eggs with high-pressure or -temperature treatments applied at the time of first cleavage to produce mitotic gynogenetic diploids and tetraploids. Androgenesis has been successfully induced in fish by irradiation of ova, fertilization of eggs with normal sperm, and suppression of the first mitosis with high-pressure treatments. Gynogenetic diploids have been used for cytogenetic studies of meiotic phenomena and gene mapping. The general finding to date is that the arrangement of genes on chromosomes is high...Keywords
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