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Genetic parameters of survival in four generations of Indian white shrimp (Fenneropeneaus indicus) |
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| Authors: | Mohamed E Megahed Gamal Elmesiry Khaled Mohamed Arun K Dhar |
| Institution: | 1. Gulf of Suez &2. Aqaba’s Branch, Attaka, National Institute of Oceanography and Fisheries (NIOF), Suez, Egypt;3. Department of Animal Production and Fish Resources, Faculty of Agriculture, Suez Canal University, Ismailia, Egypt;4. Aquaculture Pathology Laboratory, School of Animal and Comparative Biomedical Sciences, The University of Arizona, Tucson, Arizona, USA |
| Abstract: | This study evaluated the genetic variance for survival at harvest of Indian white shrimp (Fenneropenaeus indicus) using a pedigreed synthetic population generated upon collecting broodstock from different fishery grounds in Egypt. The estimated heritabilities (h2 ± SE) of survival from generations G0 to G3 ranged from 0.144 ± 0.026 to 0.008 ± 0.030 using a model that included the common environmental effect (c2). Low heritability (0.014 ± 0.015) was estimated across generations with the inclusion of common environmental effect (c2). However, the h2 of survival from G0 to G1 ranged from 0.569 ± 0.071 to 0.410 ± 0.011 when c2 was not included. The genetic correlation for survival between different ponds from G0 to G3 was moderate to high (0.79 ± 0.042 to 0.83 ± 0.012) but significantly different (P < 0.05). There were low correlation coefficients (?0.237 ± 0.089 to 0.316 ± 0.073) between body weight estimated breeding value (EBV) and survival EBV of families in four generations. |
| Keywords: | Fenneropenaeus indicus Indian white shrimp survival growth heritability selective breeding |