Skip to main content
Journal cover image

Allotetraploid Mimulus sookensis are highly interfertile despite independent origins.

Publication ,  Journal Article
Modliszewski, JL; Willis, JH
Published in: Molecular ecology
November 2012

Polyploidy (whole-genome duplication) has contributed significantly to angiosperm evolution and diversification. To date, it has been found that most polyploids are the result of multiple formation events, which may contribute to genetic diversity and affect interfertility among polyploid lineages of independent origin. A recently discovered allotetraploid derivative of Mimulus guttatus and M. nasutus, Mimulus sookensis, is found throughout the valleys of western Oregon and Vancouver Island. Here, we analyse the patterns of nucleotide diversity at three chloroplast and six nuclear loci in M. guttatus, M. nasutus and M. sookensis, to gain insight into the formation of M. sookensis. By analysing the patterns of genetic variation seen in the diploid progenitors in comparison with the variation seen in M. sookensis, we are able to show that M. sookensis has recurrently formed. We also observed that most M. sookensis individuals are fixed heterozygotes at all of the nuclear loci examined, suggesting that duplicate gene loss is not extensive in M. sookensis. To assess the possibility that hybridization among M. sookensis has contributed to genetic diversity, we conducted crossing experiments within M. sookensis. We found that M. sookensis of independent origin are highly interfertile, suggesting that crossing barriers do not exist within M. sookensis, and that hybridization among M. sookensis may result in new recombinant genotypes. Together, the data suggest that although recurrent origins may be common, they can contribute to genetic diversity without contributing to reproductive isolation among independently arisen polyploid lineages.

Duke Scholars

Published In

Molecular ecology

DOI

EISSN

1365-294X

ISSN

0962-1083

Publication Date

November 2012

Volume

21

Issue

21

Start / End Page

5280 / 5298

Related Subject Headings

  • Sequence Analysis, DNA
  • Polyploidy
  • Plant Infertility
  • Oregon
  • Molecular Sequence Data
  • Mimulus
  • Hybridization, Genetic
  • Haplotypes
  • Genome, Plant
  • Genetic Variation
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Modliszewski, J. L., & Willis, J. H. (2012). Allotetraploid Mimulus sookensis are highly interfertile despite independent origins. Molecular Ecology, 21(21), 5280–5298. https://doi.org/10.1111/j.1365-294x.2012.05706.x
Modliszewski, Jennifer L., and John H. Willis. “Allotetraploid Mimulus sookensis are highly interfertile despite independent origins.Molecular Ecology 21, no. 21 (November 2012): 5280–98. https://doi.org/10.1111/j.1365-294x.2012.05706.x.
Modliszewski JL, Willis JH. Allotetraploid Mimulus sookensis are highly interfertile despite independent origins. Molecular ecology. 2012 Nov;21(21):5280–98.
Modliszewski, Jennifer L., and John H. Willis. “Allotetraploid Mimulus sookensis are highly interfertile despite independent origins.Molecular Ecology, vol. 21, no. 21, Nov. 2012, pp. 5280–98. Epmc, doi:10.1111/j.1365-294x.2012.05706.x.
Modliszewski JL, Willis JH. Allotetraploid Mimulus sookensis are highly interfertile despite independent origins. Molecular ecology. 2012 Nov;21(21):5280–5298.
Journal cover image

Published In

Molecular ecology

DOI

EISSN

1365-294X

ISSN

0962-1083

Publication Date

November 2012

Volume

21

Issue

21

Start / End Page

5280 / 5298

Related Subject Headings

  • Sequence Analysis, DNA
  • Polyploidy
  • Plant Infertility
  • Oregon
  • Molecular Sequence Data
  • Mimulus
  • Hybridization, Genetic
  • Haplotypes
  • Genome, Plant
  • Genetic Variation