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Induced interspecific androgenesis using diploid sperm from allotetraploid hybrids of common carp×red crucian carp
- Source :
-
Aquaculture . Apr2007, Vol. 264 Issue 1-4, p47-53. 7p. - Publication Year :
- 2007
-
Abstract
- Abstract: In the present study, viable diploid androgenetic individuals (AT-ag) (2n =100) have been developed in UV-radiated eggs of goldfish (GF) (Carassius auratus) following fertilization with diploid spermatozoa from male allotetraploid hybrid (AT) F13 (4n =200) of red crucian carp (C. auratus red var.) (♀)×common carp (Cyprinus carpio L.) (♂). In the experimental groups, eggs were inactivated by UV-rays, the range of UV-radiation dose tested varied from 240 to 600 mJ/cm2, the relative high hatching rate (4.1±0.4%) and survival from hatching to start of feeding (41.3±2.6%) were given at UV dose of 300 mJ/cm2. The androgenetic nature was confirmed by chromosome observation and DNA content measurement of somatic cells by a flow cytometer. The AT-ag were diploid (2n =100) whereas the controls (GF×AT) were triploids (3n =150). The diploid AT-ag grew slower than the triploid GF×AT. The AT-ag and GF×AT were also morphologically distinguishable. The AT-ag began to sexually mature at the age of 2 years, and their fertility further increased at the age of 3 years. The tetraploids were obtained in the offspring (F1ag×ag) produced by mating the males with females of AT-ag and in the progeny (AT-ag×AT) generated by crossing the males of AT with the females of AT-ag, indicating that diploid AT-ag could produce diploid gametes. All the sex ratios of males to females in AT-ag, F1ag×ag, AT-ag×AT were not significant (P > 0.05) from the ratio of 1:1, suggesting the XXXY sex-determining mechanism in the males of AT. The present study indicated that bisexual fertile diploid AT-ag were successfully induced from diploid spermatozoa of AT. [Copyright &y& Elsevier]
- Subjects :
- *ANDROGENESIS
*REPRODUCTION
*FISH fertility
*CRUCIAN carp
Subjects
Details
- Language :
- English
- ISSN :
- 00448486
- Volume :
- 264
- Issue :
- 1-4
- Database :
- Academic Search Index
- Journal :
- Aquaculture
- Publication Type :
- Academic Journal
- Accession number :
- 24300069
- Full Text :
- https://doi.org/10.1016/j.aquaculture.2006.07.004