אסיף מאגר המחקר החקלאי

Fertility problems in the second generation of a four-species tilapia cross

Year:

2004

Source of publication :

Authors :

Volume :

56

Co-Authors:

Hulata, G., Agricultural Research Organization, Institute of Animal Science, Department of Aquaculture, P.O. Box 6, Bet Dagan 50250, Israel
Cnaani, A., Agricultural Research Organization, Institute of Animal Science, Department of Aquaculture, P.O. Box 6, Bet Dagan 50250, Israel
Slossman, T., Agricultural Research Organization, Institute of Animal Science, Department of Aquaculture, P.O. Box 6, Bet Dagan 50250, Israel
Gall, G.A.E., Department of Animal Science, University of California, Davis, CA 95616, United States

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Abstract:

Reproductive problems were encountered in attempting to produce the second generation of a four-way cross of tilapia from interspecific F1 hybrids. The cross (Oreochromis mossambicus × O. aureus) × (Sarotherodon galilaeus × O. niloticus) successfully bred for one generation, however, not even a single batch of progeny was obtained in the subsequent generation. It was concluded that the complex genetic structure of this cross caused the fertility problem. Any similar breeding programs that are based on multi-species crosses should take into consideration that reproductive problems may occur.

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