Applications of genetics in aquaculture (2019 – an updated lecture)

This lecture has been delivered by Dr. Abdel Rahman El Gamal during August 2019 as a contribution to the “Fish Culture Development training course – Africa” which is annually organized by the Egyptian International Centre for Agriculture (EICA) with the support by Japan International Cooperation Agency (JICA). The introductory part of the lecture addressed the key issues especially those related to the applications of genetics in aquaculture which addressed the management of broodstock (with a special emphasis on effective breeding number), selection methodologies (for single or multiple traits), hybridization, ploidy induction (triploidy – tetraploidy) and ending by advanced technologies such as gynogenesis, androgenesis and genetic engineering. This updated lecture included more details on the heritability of some economical traits in selected fish species. The main breeding issues such as inbreeding, genetic bottlenecks, selection plateau and others have been addressed in this lecture. The genetic background in the sex reversal of tilapia fry has been covered in the lecture.

The possible genetic concerns regarding the stocking enhancement programs have been also addressed. Diagrams and case studies have been brought in to support the lecture. Fish genetics, application of fish genetics in aquaculture, heritability coefficient, selection, selection index, selection index, selection plateau, effective breeding number, hybridization, reciprocal cross, sex reversal of tilapia, triploidy, tetraploidy, gynogenesis, androgenesis, genetics in stock enhancement..

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