Integration of quantative and molecular genetics in shrimp breeding
2010
Benzie, John A. H.
The increasing quantity of high quality DNA sequence, and proteomic, data is providing more efficient means of selecting strains and understanding physiology. Whole genome selection and the demonstration that high density single nucleotide polymorphism (SNP) analysis provides more accurate pedigree information in dairy cattle than the paper pedigree trail has revealed the prospective strengths of these approaches. In principle applicable to shrimp, fundamental differences between shrimp and vertebrate biology means the level of information available for shrimp is far less than that for cattle, pigs, chickens or finfish. Pedigreed data is far less in spatial and temporal extent and covers a relatively limited number of traits. Molecular markers allow parentage tracking and assessment of diversity levels in breeding programs. Work is in progress on the molecular and genetic mechanisms controlling key aspects of performance, including growth, reproduction and disease response. The success of the few attempts to integrate available molecular tools is limited by the lack of depth of information on shrimp and a lack of investment in the process. More effort will be required to obtain the critical research mass and quality of information needed to achieve true integration of molecular and quantitative genetics in shrimp breeding.
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