When ancestral humans walked out of Africa tens of thousands of years ago, Drosophila melanogaster fruit flies came along with them. Now the fruit flies, widely used for genetics research, are returning to Africa and establishing new populations alongside flies that never left — offering new insights into the forces that shape genetic variation.

That's one of the findings from two new papers published this month by researchers at the University of California, Davis, and their colleagues that describe the genomes of almost 200 strains of the tiny flies.

The work reveals strong evidence of pervasive natural selection throughout the D. melanogaster genome, said Charles Langley, professor of genetics in the Department of Evolution and Ecology at UC Davis and an author on both papers. That is in striking contrast with what is known of the human genome, which shows comparatively little evidence of adaptation over the last 100,000 years... Read More

DAVIS - The University of California, Davis, and Michigan State University have received $6 million from the Coalition for Sustainable Egg Supply to support research on the sustainability of laying hen housing in the United States.

The first study of its kind, the three-year "CSES Laying Hen Housing Research Project" will explore the interactions and tradeoffs among food safety, worker safety, environmental impact, hen health and welfare, and food affordability aspects of three different housing systems. Information generated by the research is expected to help egg purchasers and producers make objective, science-based decisions as the egg industry evolves in response to consumer needs and desires.

The goal of the Coalition for Sustainable Egg Supply is to evaluate the viability of various laying hen housing systems.