Genetic mapping shows complex traits derive significant heritability from intergenic DNA regions
Source Summary
Genetic research demonstrates that complex traits such as schizophrenia, height, and cholesterol levels are shaped by thousands of genetic variants distributed across the genome. While some traits are influenced by relatively few genetic variants, others exhibit polygenicity—the contribution of many thousands of variants, each with minimal individual effect. The study reveals that intergenic DNA regions play a substantial role in determining heritability of these complex traits.
Why it matters
Understanding that intergenic DNA contributes substantially to heritability of complex diseases and traits advances genetic research by identifying previously underappreciated sources of inherited variation.
