student profile: Mr Md Mehedi Hasan


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Thesis work

Thesis title: Genetic investigation of body morphological traits in Peneaus monodon and their relationship to shrimp production.

Supervisors: Herman RAADSMA , Peter THOMSON , Mehar KHATKAR

Thesis abstract:

The black tiger prawn (Peneaus monodon) is one of the most commercially important aquaculture species in the world. Application of genetic selection in black tiger prawns will increase the genetic merit and farm profitability. For selective breeding programmes to be successful sufficient genetic variation has to be present in the traits under selection. For shrimp production, body weight is of primary importance. However, of added interest are traits related to body weight and body composition, such as tail weight and weight:length ratios. Using image analyses it is now feasible to digitally dissect such traits at a scale to obtain reliable genetic parameters –heritability, phenotypic, genetic and environmental correlations among these traits and their relationship with body weight. Apart from estimating additive genetic variation, it is equally important to consider additive gene marker effects which result in change in allele frequencies due to selection and non-additive effects such as dominance and epistasis. Furthermore genotype × environment interactions coupled with changes in environmental conditions may be important considerations for successful improvement of shrimp. At present there is relatively little information on our genetic understanding of the importance of body morphological traits in relation to body weight, and changes due to changing environmental conditions. To consider these issues, in my PhD studies, I will apply advanced quantitative genetic and genomic analyses to investigate genetic factors of body morphology, estimate the importance and nature of genotype by environment interactions, estimate the importance of additive and non-additive genetic effects in these traits, and their relationship to production performance in Black Tiger Prawn (Penaeus monodon).

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