Tuesday, September 15, 2015
University of Queensland scientists have found a genetic basis for height and body mass differences between European populations
Queensland Brain Institute researcher Dr Matthew Robinson said that the findings could explain why people from northern European countries tended on average to be taller and slimmer than other Europeans. He said the genes that resulted in greater height correlated strongly with genes that reduced body mass index. "Our findings give a genetic basis to the stereotype of Scandinavians as being tall and lean," Dr Robinson said. The study paves the way to determine whether genetics also plays a role in creating national differences in disorders such as dementia, diabetes and heart disease. Fellow researcher Professor Peter Visscher said that the genetic differences were likely to result from historic natural selection on height and BMI. "The research suggests that tall nations are genetically more likely to be slim," Professor Visscher said. Dr Robinson said that on average, 24% of the genetic variation in height and 8% of the genetic variation in BMI could be explained by regional differences. "Countries' populations differ in many ways, from the height of their people to the prevalence of certain diseases," he said. The study looked at height and BMI differences in 9416 people from 14 European countries and used data from genome-wide association studies (GWAS).