Sex determination in fish / T.J. Pandian.

Format:

Book

Author/Creator:

Pandian, T. J.

Contributor:

ebrary, Inc.

Clarence J. Marshall Memorial Library Fund.

Language:

English

Subjects (All):

Fishes--Sexing.

Fishes.

Fishes--Genetics.

Fishes--Sex ratio.

Fishes--Reproduction.

Physical Description:

1 online resource (xi, 282 pages) : illustrations (some color), map

Edition:

First edition.

Place of Publication:

St. Helier, Jersey, British Channel Islands ; Enfield, NH : Science Publishers ; Boca Raton : Distributed by CRC Press, [2011]

System Details:

text file

Summary:

This book is the first to report that research in allogenics/xenogenics has conclusively shown that fishes have retained bisexual potency even after sexual maturity and spermiation. The XY genotype found in the unexpected female phenotypes sired by supermales (Y1Y2) and androgenic males (Y2Y2) points out the need to employ sex specific molecular markers to identify the true genotype of a juvenile, which matures either as a male or female, depending upon the sex of its pair (female or male) and thereby critically assessing the environmental role in sex determination. This book is meant to assist molecular biologists in the search of sex determining gene(s), fishery biologists endeavouring to develop techniques for profitable monosex aquaculture and ecologists interested in conservation of fishes and their genomes.

Contents:

1 Introduction 1

1.1 Gonadal origin, eggs and sperm 3

1.2 Chromosomes and gamety 7

1.3 Prevalence of gonochorism 8

1.4 Escape from Muller's ratchet 8

1.5 Multiple parentage and genetic diversity 10

1.6 Prelude 15

2 Cytogenetics and Sex Chromosomes 18

2.1 Chromosomes and genomes 19

2.2 Cytogenetics 23

2.3 Heterogamety 26

3 Hybridization and Sex Ratio 36

3.1 Extent of hybridization 37

3.2 Hybrid identification 38

3.3 Viability and fertility 40

3.4 Introgressive hybridization 44

3.5 Sex ratio 47

4 Gynogenesis and Consequences 51

4.1 Gynogenic types 51

4.2 Purity of gynogenics 56

4.3 Survival and gamety 58

4.4 Fertility and F₁ sex ratio 64

4.5 Sex ratio and departures 65

5 Androgenesis and Autosomes 69

5.1 Production methods 70

5.2 Survival 78

5.3 Fertility 82

5.4 Overriding autosomes 84

6 Triploidy and Sterility 89

6.1 Types of triploids 90

6.2 Survival and sex ratio 96

6.3 Male's fertilizability 99

6.4 Female sterility 105

7 Tetraploidy and Polyploidy 112

7.1 Survey and history 112

7.2 Scope for polyploidization 115

7.3 Tetraploid types 117

7.4 True induced tetraploids 118

7.5 Polyploidy 122

7.6 Interploid hybridizations 125

7.7 Unreduced "gamete bank" 126

8 Allogenesis and Xenogenesis 130

8.1 Primordial Germ Cells (PGCs) 131

8.2 PGC transplantation system 134

8.3 PGCs in hybrid embryos 139

8.4 PGCs in heterospecific embryos 141

8.5 Spermatogonial Stem Cells (SSCs) 146

8.6 Renewal of SSCs 148

8.7 SSC transplantation system 149

8.8 Relevance of PGCs and SSCs 155

8.9 Surgical gonadectomy 158

9 Sex change and Hermaphroditism 160

9.1 Extant of hermaphroditism 161

9.2 Sex change in gonochores 165

9.3 Sex allocation theory 166

9.4 Sex changing age 167

9.5 Genetic or environment? 171

10 Unisexualism and Reproduction 177

10.1 Mutational meltdown 178

10.2 Exploration of reproductive modes 181

10.3 Squalius alburnoides 184

10.4 Males in unisexuals 188

11 Genetic Sex Determination 191

11.1 Molecular markers 193

11.2 Sex chromosomes 195

11.3 Sexonomics 196

11.4 Sex changers 201

11.5 Polygenic sex determination 203

11.6 Concluding remarks 205.

Notes:

Description based on print version record.

Includes bibliographical references and indexes.

Electronic reproduction. Palo Alto, Calif. Available via World Wide Web.

Local Notes:

Acquired for the Penn Libraries with assistance from the Clarence J. Marshall Memorial Library Fund.

Other Format:

Print version: Sex determination in fish.

ISBN:

1439879192

9781439879191

Publisher Number:

99950092443

Access Restriction:

Restricted for use by site license.