Book ChapterDOI
8 Chromosome Set Manipulation and Sex Control in Fish
TLDR
This chapter describes the techniques used in chromosome set manipulation and reviews the results and prospects in the application of gynogenesis, androgenesis, and induced polyploidy to fish.Abstract:
Publisher Summary This chapter describes the techniques used in chromosome set manipulation and reviews the results and prospects in the application of gynogenesis, androgenesis, and induced polyploidy to fish. Chromosome-set manipulation techniques of sperm chromosome inactivation (with radiation or chemicals) and suppression of cell divisions (with heat shock, cold shock, or pressure) can be readily applied to fish to produce gynogenetic and polyploid individuals. Gynogenetic individuals have all their chromosomes from the female parent and should all be females in species with XX females. Polyploids include triploids that are expected to be sterile, and tetraploids that have the potential of being fertile and producing sterile triploids when crossed to normal diploids. Partially inbred gynogenetic diploids and triploids may be produced by treatments causing retention of the second polar body of the egg. Completely homozygous gynogenetic diploids and tetraploids may be produced by treatments blocking the first mitotic division.read more
Citations
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Journal ArticleDOI
Sex determination and sex differentiation in fish: an overview of genetic, physiological, and environmental influences
TL;DR: The lability of sex-determination systems in fish makes some species sensitive to environmental pollutants capable of mimicking or disrupting sex hormone actions, and such observations provide important insight into potential impacts from endocrine disruptors, and can provide useful monitoring tools for impacts on aquatic environments.
Journal ArticleDOI
Polyploid fish and shellfish: Production, biology and applications to aquaculture for performance improvement and genetic containment
Francesc Piferrer,Andy R. Beaumont,Jean-Claude Falguiere,Martin Flajšhans,Pierrick Haffray,Lorenzo Colombo +5 more
TL;DR: This review focuses on some current issues related to the application of induced polyploidy in aquaculture and the effectiveness of current triploidisation techniques, including the applicability of tetraploids to generate auto- and allotriploids and the degree and permanence of gonadal sterility in triploids.
Journal ArticleDOI
Endocrine sex control strategies for the feminization of teleost fish
TL;DR: This review concentrates on the use of oestrogens for sex control, discussing the advantages of producing monosex female stocks for finfish aquaculture, and pointing out those cases in which hormonal sex reversal technology is worth applying.
Journal ArticleDOI
Endocrine and environmental aspects of sex differentiation in fish
TL;DR: Although steroids and steroidogenic enzymes are probably not the initial triggers of sex differentiation, new data, including molecular approaches, have confirmed that they are key physiological steps in the regulation of this process.
Journal ArticleDOI
The Physiology and Behavior of Triploid Fishes
TL;DR: Artificially produced triploids generally differ from conspecific diploids in three fundamental ways: they are more heterozygous, they have larger but fewer cells in most tissues and organs, and their gonadal development is disrupted to some extent.
References
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Journal ArticleDOI
Production of clones of homozygous diploid zebra fish ( Brachydanio rerio )
TL;DR: Clones of homozygous fish have been produced from individual homozygotes and associated genetic methods facilitate genetic analyses of this vertebrate.
Journal ArticleDOI
Sex control and manipulation in fish
TL;DR: Phenotypical feminization is induced successfully by using estradiol-17β, and particularly fruitful techniques for control of sex in aquacultured fish will involve the combination of steroid treatment with chromosome manipulation.
Journal ArticleDOI
Why Polyploidy is Rarer in Animals Than in Plants
TL;DR: The reason for the rare occurrence of polyploidy in animals, as compared with plants, is, in essence, very simple-animals usually have two sexes which are differentiated by means of a process involving the diploid mechanism of segregation and combination.
Journal ArticleDOI
Sex in Relation to Chromosomes and Genes
TL;DR: The conclusion is that sex in organisms is primarily dependent on physiological states, that these states are subject to change and reversal through ecological factors and that sexuality is a subject for experimental investigation and one of the problems that physiological ecology alone can properly solve.
Journal ArticleDOI
Gene-Centromere Mapping in Rainbow Trout: High Interference over Long Map Distances.
TL;DR: The high proportion of heterozygotes for some loci after gynogenesis involving second polar body retention demonstrates that this is not a practical method for producing homozygous inbred lines in rainbow trout; treatments suppressing the first cell division are more promising for this purpose.