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The University of the Philippines (UP) is the country’s national university. This premier institution of higher learning was established in 1908 and is now a university system composed of eight constituent universities and one autonomous college spread throughout 17 campuses in the archipelago.

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Journal Article

Journal Article

Genetic and breeding of tilapia: a review  [1988]

Tave, D. (Auburn Univ., Alabama (USA.). Dept. of Fisheries and Allied Aquaculture. Alabama Agricultural Experiment Station);

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Genetic and breeding studies in Oreochromis aureus, O. mossambicus; O. niloticus and O. urolepis hornorium are reviewed. The saddleback phenotypes in O. aureus is controlled by a dominant lethal autosomal gene. The stumpbody phenotype in O. aureus is a nonheritable congenital defect. Genetics of sex and body color are not completely understood. Strain differences for pigmentation, cold tolerance, growth, fecundity, and success in reproducing with other species were found for O. niloticus. There have been three selection programs to improve early growth in O. niloticus. Two were successful. The third was successful, realized heritability for weight was 0.19 after three generations of selection. One generation of selection improved growth by 10.7 to 15.5% in O. aureus. One generation of selection improved weight gain in O. mossambicus by 7.0%. Proposals to improve efficiency of selection for growth have included selection, family selection, and weight-specific selection. Crossbreeding between strains of O. niloticus improved growth by as much as 36%. Cold tolerance has been improved by interspecific hybridization, and this trait was transferred from O. aureus to a cold-sensitive population of red tilapia by back-crossing. An inbreeding study in O. mossambicus showed that the inbred group had lower survival and growth rates than crossbred controls. Triploids, tetraploid, and gynogenetic tilapias have been produced by chromosomal manipulation.
From the journal
ICLARM Conference Proceedings (Philippines)
ISSN : 0115-4435

Bibliographic information

Language:
English
Type:
Conference
In AGRIS since:
1991
Issue:
15
Publisher:
ICLARM; Dept. of Fisheries
All titles:
"Genetic and breeding of tilapia: a review"@eng
Other:
"1 table. Bibliography (55 ref.) Summary (En)"
"Second International Symposium on Tilapia in Aquaculture, Pullin, R.S.V.Bhukaswan, T.Tonguthai, K.Maclean, J.L. (eds.).- Metro Manila (Philippines): ICLARM; Dept. of Fisheries, 1988.- ISBN 971-1022-60. p. 285-293"
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Bibliographic information

Language:
English
Type:
Conference
In AGRIS since:
1991
Issue:
15
Publisher:
ICLARM; Dept. of Fisheries
All titles:
"Genetic and breeding of tilapia: a review"@eng
Other:
"1 table. Bibliography (55 ref.) Summary (En)"
"Second International Symposium on Tilapia in Aquaculture, Pullin, R.S.V.Bhukaswan, T.Tonguthai, K.Maclean, J.L. (eds.).- Metro Manila (Philippines): ICLARM; Dept. of Fisheries, 1988.- ISBN 971-1022-60. p. 285-293"