Genetic Status and Hybridization of Red Tilapia Strains Sukabumi, Thailand, and Taiwan | ||||
| Egyptian Journal of Aquatic Biology and Fisheries | ||||
| Article 33, Volume 29, Issue 3, May and June 2025, Page 519-535 PDF (655.27 K) | ||||
| DOI: 10.21608/ejabf.2025.427688 | ||||
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| Author | ||||
| Albar et al. | ||||
| Abstract | ||||
| The red tilapia (Oreochromis spp.) is a globally important freshwater aquaculture commodity. This study evaluated the genetic status, reproductive performance, and growth of Indonesian (Sukabumi) and introduced (Thailand and Taiwan) red tilapia strains and their hybrids. Genetic analysis using the mitochondrial DNA marker cytochrome oxidase subunit 1 (COI) confirmed species identity (700bp fragment), and a completely randomized design was used to measure growth differences between the hybrids. Thailand strains showed the highest genetic diversity, whereas Sukabumi and Taiwan strains showed low genetic diversity. Hybridization between the Sukabumi and Thailand strains was best for growth, resulting in a heterosis effect on body weight of 41.96%. Morphometric analysis identified head size difference between the hybrid groups of Taiwan parents with Thailand and Sukabumi strains. The black spot pigmentation characterized the genetic flow of the Sukabumi strain. These findings provide a basis for selective breeding programs to improve the genetic diversity and production performance of red tilapia in Indonesia. | ||||
| Keywords | ||||
| Genetic diversity; Heterosis; Hybridization; Morphometrics; Red tilapia | ||||
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