Autonomous self-fertilization in Linum sulcatum, a native annual with a previously unknown mating system

Matthew R. Jahnke, Julie R Etterson

Research output: Contribution to journalArticle

Abstract

The mating systems of wild plant populations have profound effects on their genetic structure and evolution, yet remain unknown or incompletely described for many species. One such species, the herbaceous native annual Linum sulcatum Riddell (Linaceae), is thought to be self-compatible, but there has been no experimental evidence to date to support this claim. To assess the breeding system of this species, seeds were collected from wild populations and reared in a controlled environment. Floral manipulations and controlled pollinations were conducted to determine the degree of self-compatibility of this species and to distinguish between autonomous and facilitated modes of selfing. Additional controlled within- and between-population crosses were conducted to determine the relative degree to which this species can outcross. This study showed that self-fertilization was highly successful and can occur autonomously. In contrast, outcrossing success, both within and between populations, was very limited, suggesting this species may exhibit an extreme degree of cross-incompatibility. A pollen tube growth experiment showed that self-pollination resulted in the formation of more pollen tubes relative to cross-pollination and that complete pollen tube growth can occur less than 2 h following self-pollination. This information is relevant to the future persistence of this species, as much of its remaining habitat is distributed among small, highly fragmented patches subjected to current and future environmental stressors.

Original languageEnglish (US)
Pages (from-to)57-67
Number of pages11
JournalJournal of Plant Research
Volume132
Issue number1
DOIs
StatePublished - Jan 25 2019

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Linum sulcatum
selfing
mating systems
pollen tubes
self-pollination
Linaceae
cross pollination
wild plants
outcrossing
pollination
breeding
habitats
seeds

Keywords

  • Linum sulcatum mating system
  • Pollen tube
  • Self-fertilization

PubMed: MeSH publication types

  • Journal Article

Cite this

Autonomous self-fertilization in Linum sulcatum, a native annual with a previously unknown mating system. / Jahnke, Matthew R.; Etterson, Julie R.

In: Journal of Plant Research, Vol. 132, No. 1, 25.01.2019, p. 57-67.

Research output: Contribution to journalArticle

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