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Plant Reproduction

, Volume 26, Issue 4, pp 309–315 | Cite as

On the origin and evolution of apomixis in Boechera

  • John T. Lovell
  • Olawale M. Aliyu
  • Martin Mau
  • M. Eric Schranz
  • Marcus Koch
  • Christiane Kiefer
  • Bao-Hua Song
  • Thomas Mitchell-Olds
  • Timothy F. SharbelEmail author
Original Article

Abstract

The genetic mechanisms causing seed development by gametophytic apomixis in plants are predominantly unknown. As apomixis is consistently associated with hybridity and polyploidy, these confounding factors may either (a) be the underlying mechanism for the expression of apomixis, or (b) obscure the genetic factors which cause apomixis. To distinguish between these hypotheses, we analyzed the population genetic patterns of diploid and triploid apomictic lineages and their sexual progenitors in the genus Boechera (Brassicaceae). We find that while triploid apomixis is associated with hybridization, the majority of diploid apomictic lineages are likely the product of intra-specific crosses. We then show that these diploid apomicts are more likely to sire triploid apomictic lineages than conspecific sexuals. Combined with flow cytometric seed screen phenotyping for male and female components of apomixis, our analyses demonstrate that hybridization is an indirect correlate of apomixis in Boechera.

Keywords

Boechera Apomixis Apomeiosis Hybridization Polyploidy 

Notes

Acknowledgments

We thank J. M. Corral and J. Beck for insightful discussions. This work was partially funded by the Apomixis Research Group, using basic level funding provided by the IPK. Additional funding comes from DFG Grant #SH337/7-1 to TFS and a μMorph training Grant to JTL. TMO was supported by NIH Grant R01-GM086496.

Supplementary material

497_2013_218_MOESM1_ESM.pdf (2.9 mb)
Supplementary material 1 (PDF 2978 kb)

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • John T. Lovell
    • 1
    • 2
  • Olawale M. Aliyu
    • 1
  • Martin Mau
    • 1
  • M. Eric Schranz
    • 3
  • Marcus Koch
    • 4
  • Christiane Kiefer
    • 5
  • Bao-Hua Song
    • 6
  • Thomas Mitchell-Olds
    • 7
  • Timothy F. Sharbel
    • 1
    Email author
  1. 1.Apomixis Research GroupLeibniz Institut für Pflanzengenetik und Kulturpflanzenforschung (IPK)GaterslebenGermany
  2. 2.Graduate Degree Program in EcologyColorado State UniversityFt. CollinsUSA
  3. 3.Biosystematics Group, Plant SciencesWageningen UniversityWageningenThe Netherlands
  4. 4.Department of Biodiversity and Plant Systematics, Centre for Organismal Studies HeidelbergHeidelberg UniversityHeidelbergGermany
  5. 5.Department of Plant Developmental BiologyMax Planck Institute for Plant Breeding ResearchCologneGermany
  6. 6.Department of BiologyUniversity of North CarolinaCharlotteUSA
  7. 7.Department of Biology, Institute for Genome Sciences and PolicyDuke UniversityDurhamUSA

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