This is the blog for GW students taking Human Evolutionary Genetics. This site is for posting interesting tidbits on: the patterns and processes of human genetic variation;human origins and migration; molecular adaptations to environment, lifestyle and disease; ancient and forensic DNA analyses; and genealogical reconstructions.

GWHEG figure

GWHEG figure

Monday, March 26, 2018

The Many Shades of Pearls


A really interesting study looked at the phenotype variation in a model species P. margaritifera by examining the three way interaction between the donor oyster, recipient oyster, and the final cultured pear product. This particular species is a good model because of  it’s large range of pearl colors that is reflected by the large diversity of inner shell color phenotypes.  For this study they observed this phenotype variation at the macro, micro, and molecular level. Examining this at the molecular level showed that there were a series of gene encoding proteins, specifically genes related to aragonite formation, associated with the shell biomineralisation process that show significant differences in the donor phenotypes. Through a series of experimental grafting of the donor to recipient oyster species show that there is high amounts of inter-individual donor phenotype. 

For a more in depth analysis of this study see the original paper in Nature here.

-Sam

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