Líffræðifélag Íslands
Líffræðiráðstefnan 2015
Erindi/veggspjald / Talk/poster V64
M. M. Mahbub Alam (1,2), Kristen M. Westfall(1), Snæbjörn Pálsson(1)
1. Department of Life and Environmental Sciences University of Iceland, 101 Reykjavik, Iceland , 2. Faculty of Fisheries Sylhet Agricultural University, 3100 Sylhet, Bangladesh
Kynnir / Presenter: Kristen M. Westfall, Snæbjörn Pálsson
Tengiliður / Corresponding author: M. M. Mahbub Alam (mma3@hi.is)
Penaeus monodon is the most targeted and economically important penaeid shrimp in the Indo-West Pacific region and sustains an important source for aquaculture. Here P. monodon sampled at four locations along the coast of Bangladesh was studied using 10 microsatellite markers and 14 cSNPs, six nonannotated and eight in immunological genes (c-type lectin and one HLA3) which variations have been associated to tolerance to pathogens and survival in aquaculture. The aim of this study was to evaluate the population structure in Bangladesh waters and signs of natural selection due to pathogens in natural populations. High variation was observed in line with a previous study on mtDNA variation where 83 different haplotypes were found in a sample of 86 individuals. The population samples were genetically differentiated from each other except the samples from Sundarban (western Bangladesh) and Middle ground of the Bay of Bengal. Three genetically distinguishable populations were observed, one in the east of mangrove forest in Barguna coast (south Bangladesh), the Sundarban-Middle ground closer to the delta of the river Ganges and Sent Martin in south eastern Bangladesh, close to Miyanmar, with FST ranging from 0.004-0.015 with P < 0.0126. A large proportion of individuals caught in Middle Ground and Sent Martin shares a genetic origin which is distinct from the other individuals, possibly from more unsampled southern regions. Variation and the FST's for the SNP's from the c-type lectin genes and the HLA3 did not differ from the other markers, indicating that there has been no selective effects due to the pathogens at these loci in the natural populations. The results will be useful for selective breeding to produce disease resistant and high yielding seeds utilizing wild population and for sustainable wild stock management.