Selective trade-offs maintain alleles underpinning complex trait variation in plants.

Journal Article (Journal Article)

To understand evolutionary factors that maintain complex trait variation, we sequenced genomes from a single population of the plant Mimulus guttatus , identifying hundreds of nucleotide variants associated with morphological and life history traits. Alleles that delayed flowering also increased size at reproduction, which suggests pervasive antagonistic pleiotropy in this annual plant. The "large and slow" alleles, which were less common in small, rapidly flowering populations, became more abundant in populations with greater plant size. Furthermore, natural selection within the field population favored alternative alleles from year to year. Our results suggest that environmental fluctuations and selective trade-offs maintain polygenic trait variation within populations and also contribute to the geographic divergence in this wildflower species.

Full Text

Duke Authors

Cited Authors

  • Troth, A; Puzey, JR; Kim, RS; Willis, JH; Kelly, JK

Published Date

  • August 2018

Published In

Volume / Issue

  • 361 / 6401

Start / End Page

  • 475 - 478

PubMed ID

  • 30072534

Electronic International Standard Serial Number (EISSN)

  • 1095-9203

International Standard Serial Number (ISSN)

  • 0036-8075

Digital Object Identifier (DOI)

  • 10.1126/science.aat5760


  • eng