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Title: Recent autopolyploidization in a naturalized population of Mimulus guttatus (Phrymaceae)
Authors: Simón-Porcar, Violeta I.
Silva, Jose L.
Meeus, Sofie
Higgins, James D.
Vallejo-Marín, Mario
First Published: 15-Aug-2017
Publisher: Linnean Society of London
Citation: Botanical Journal of the Linnean Society, box052,
Abstract: Polyploidization can trigger rapid changes in morphology, ecology and genomics even in the absence of associated hybridization. However, disentangling the immediate biological consequences of genome duplication from the evolutionary change that subsequently accumulates in polyploid lineages requires the identification and analysis of recently formed polyploids. We investigated the incidence of polyploidization in introduced populations of Mimulus guttatus in the UK and report the discovery of a new mixed diploid–autopolyploid population in the Shetland Isles. We conducted a genetic analysis of six Shetland populations to investigate whether tetraploid individuals may have originated from local diploid plants and compared the morphology of tetraploids and local diploids to assess the phenotypic consequences of genome duplication. Autotetraploids are genetically close to sympatric diploids, suggesting that they have originated locally. Phenotypically, whole genome duplication has resulted in clear differences between ploidies, with tetraploids showing delayed phenology and larger flowers, leaves and stems than diploids. Our results support the hypothesis that novel evolutionary lineages can rapidly originate via polyploidization. The newly discovered autopolyploidization event in a non-native Mimulus population provides an opportunity to investigate the early causes and consequences of polyploidization in the wild.
DOI Link: 10.1093/botlinnean/box052
ISSN: 0024-4074
eISSN: 1095-8339
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © the authors, 2017. This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-commercial License (, which permits unrestricted use, distribution, and reproduction in any medium non-commercially, provided the original author and source are credited.
Appears in Collections:Published Articles, Dept. of Genetics

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