Studies on Lasioglossum baleicum, or sweat bee, revealed the importance of cooperation to increase fitness. Image: Norihiro Yagi
Genetics do not contribute much to forming a social society - life science news

Research in sweat bees (Lasioglossum baleicum) revealed that social behavior is relatively independent of genetic similarities between the individuals. Fitness, i.e. an organism’s reproductive success and propagation of its genes, is rather determined by cooperative behavior. This finding contradicts an earlier theory that stated that forming of social groups is determined by genetic relationships between individuals. Sweat bees can live both in groups with many female workers and a single queen, or as individual mothers. Individual females in social nests had a higher fitness than single mothers, and 92% of this difference could be attributed to cooperative behavior while living in a group, and only 8% to genetics. Thus, this study helps to better understand the evolution of living together in social groups, including in humans.

Read the full story: Hokkaido University
Scientific publication: Science Advances