On the origin and evolution of apomixis in Boechera

J.T. Lovell, O.M. Aliyu, M. Mau, M.E. Schranz, M. Koch, C. Kiefer, B.H. Song, T. Mitchell-Olds, T.F. Sharbel

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35 Citations (Scopus)

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.
Original languageEnglish
Pages (from-to)309-315
JournalPlant Reproduction
Volume26
Issue number4
DOIs
Publication statusPublished - 2013

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Keywords

  • north-american boechera
  • genus boechera
  • holboellii brassicaceae
  • asexual reproduction
  • arabis-drummondii
  • hybridization
  • arabidopsis
  • angiosperms
  • expression
  • reappraisal

Cite this

Lovell, J. T., Aliyu, O. M., Mau, M., Schranz, M. E., Koch, M., Kiefer, C., ... Sharbel, T. F. (2013). On the origin and evolution of apomixis in Boechera. Plant Reproduction, 26(4), 309-315. https://doi.org/10.1007/s00497-013-0218-7