Genetic evaluation of growth and survival at 6 weeks old fry of Egyptian Nile tilapia (Oreochromis Niloticus) between improved abbassa and commercial manzala strains in a diallel crossing
Other Title(s)
التقييم الوراثي للنمو و البقاء على عمر 6 أسابيع لزريعة البلطي النيلي من خلال الخلط بين سلالتي العباسة المحسنة و المنزلة التجارية
Joint Authors
Said, Muhammad Muhammad
Makkawi, Wajdi Ahmad
Source
Egyptian Journal of Animal Production
Issue
Vol. 53, Issue 2 (31 May. 2016), pp.141-146, 6 p.
Publisher
Egyptian Society of Animal Production
Publication Date
2016-05-31
Country of Publication
Egypt
No. of Pages
6
Main Subjects
Abstract EN
This study aims to evaluate growth performance and estimate additive genetic, heterosis, and general reciprocal effects for body weight, body length, condition factor, and survival of Nile tilapia (Oreochromis niloticus) fry at 6 weeks old after hatching using a complete diallel cross between the genetically improved “Abbassa” strain(A) and a commercially available strain Manzala(M).
Body weight and total body length were observed significantly (P <0.001) higher in MmAf and AmMf crosses (2.87g & 5.55 cm; 2.78g & 5.33cm, respectively).
The straight-bred AmAf weight and length were 2.64g, 5.18cm, respectively while the straightbred MmMf showed the lowest growth parameters 2.42g and 5.04cm,respectively.Condition factor of AmAf , AmMf , and MmMf genotypes (1.89, 1.85, and 1.81 respectively) didn’t differ significantly whereas the MmAf cross showed a significantly lower condition factor 1.67.
The survival of the straight-bred AmAf was 0.98,which significantly (P <0.001) higher than AmMf , MmAf , and MmMf genotypes.
Abbassa strain showed 5, 2.1, and 10% additive genetic effect above the overall mean in body weight, survival, and condition factor respectively.
Heterosis estimates were positive and relatively high 11.7% and 6.2% for body weight and total body length while a negative heterosis estimates were observed for the condition factor and survival, being -6.7% and -2.6% respectively.
Reciprocal effect was significant (P <0.001) for total body length and condition factor.
The results of the current study suggest that body weight and total body length of the Nile tilapia fry at 6 weeks old after hatching could be improved through crossing schemes exploiting the heterosis effect however the crossing did not show any improvement in survival.
American Psychological Association (APA)
Said, Muhammad Muhammad& Makkawi, Wajdi Ahmad. 2016. Genetic evaluation of growth and survival at 6 weeks old fry of Egyptian Nile tilapia (Oreochromis Niloticus) between improved abbassa and commercial manzala strains in a diallel crossing. Egyptian Journal of Animal Production،Vol. 53, no. 2, pp.141-146.
https://search.emarefa.net/detail/BIM-911251
Modern Language Association (MLA)
Said, Muhammad Muhammad& Makkawi, Wajdi Ahmad. Genetic evaluation of growth and survival at 6 weeks old fry of Egyptian Nile tilapia (Oreochromis Niloticus) between improved abbassa and commercial manzala strains in a diallel crossing. Egyptian Journal of Animal Production Vol. 53, no. 2 (May. 2016), pp.141-146.
https://search.emarefa.net/detail/BIM-911251
American Medical Association (AMA)
Said, Muhammad Muhammad& Makkawi, Wajdi Ahmad. Genetic evaluation of growth and survival at 6 weeks old fry of Egyptian Nile tilapia (Oreochromis Niloticus) between improved abbassa and commercial manzala strains in a diallel crossing. Egyptian Journal of Animal Production. 2016. Vol. 53, no. 2, pp.141-146.
https://search.emarefa.net/detail/BIM-911251
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 145-146
Record ID
BIM-911251