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Microsatellite evidence for obligate autogamy, but abundant genetic variation in the herbaceous monocarp Lobelia inflata (Campanulaceae)
Max Planck Institute for Plant Breeding Research, Germany.ORCID iD: 0000-0003-4142-2579
2015 (English)In: Journal of Evolutionary Biology, ISSN 1010-061X, E-ISSN 1420-9101, Vol. 28, no 11, p. 2068-2077Article in journal (Refereed) Published
Abstract [en]

Although high levels of self‐fertilization (>85%) are not uncommon in nature, organisms reproducing entirely through selfing are extremely rare. Predominant selfers are expected to have low genetic diversity because genetic variation is distributed among rather than within lineages and is readily lost through genetic drift. We examined genetic diversity at 22 microsatellite loci in 105 individuals from a population of the semelparous herb Lobelia inflata L. and found (i) no evidence of heterozygosity through outcrossing, yet (ii) high rates of genetic polymorphism (2–4 alleles per locus). Furthermore, this genetic variation among lineages was associated with phenotypic traits (e.g. flower colour, size at first flower). Coupled with previous work characterizing the fitness consequences of reproductive timing, our results suggest that temporal genotype‐by‐environment interaction may maintain genetic variation and, because genetic variation occurs only among lineages, this simple system offers a unique opportunity for future tests of this mechanism.

Place, publisher, year, edition, pages
2015. Vol. 28, no 11, p. 2068-2077
National Category
Botany
Research subject
evolutionär genetik
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URN: urn:nbn:se:su:diva-172089DOI: 10.1111/jeb.12734OAI: oai:DiVA.org:su-172089DiVA, id: diva2:1344468
Available from: 2019-08-21 Created: 2019-08-21 Last updated: 2019-08-21Bibliographically approved

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Hughes, P. William
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