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|Title:||Full-Sib Mating Can Reduce Deleterious Effects Associated With Residual Sperm Inheritance In Gynogenotes|
Avtalion, Ramy R.
|LC Subject Headings:||Fish culture--Israel--Periodicals.|
|Publisher:||Israeli Journal of Aquaculture - BAMIGDEH|
|Citation:||Shirak, A., & Avtalion, R.R. (2001). Full-Sib Mating Can Reduce Deleterious Effects Associated With Residual Sperm Inheritance In Gynogenotes. The Israeli Journal of Aquaculture - Bamidgeh, 53(1), 15-22.|
|Series/Report no.:||The Israeli Journal of Aquaculture - Bamidgeh|
|Abstract:||Fertilization of Oreochromis aureus eggs with UV-irradiated sperm from the closely related species O. niloticus, followed by diploidy restoration, produced offspring with lower embryo viability and higher skeletal deformation rates than siblings generated with sperm from a genetically distant species (Tilapia zillii). Results showed that: (a) deleterious effects due to O. niloticus sperm accu- mulate in gynogenetic fish over generations; (b) such effects are eliminated when using T. zillii sperm to fertilize eggs from gynogenetic mothers produced by full-sib matings. These results sug- gest that: (a) deleterious effects are associated with residual male DNA fragments which may be passed on to descendent offspring; (b) such fragments are significantly purged following full-sib mating. These findings suggest that biparental reproduction may play an important role in the con- trol of genome integrality by purging supernumerary chromosome fragments.|
|Appears in Collections:||IJA Volume 53, Issue 1, 2001|
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