Factors determining hybridization rate in plants: A case study in Michigan

Beddows, Ian; Rose, Laura

doi:10.1016/j.ppees.2018.07.003

Cited by 18 publications

(24 citation statements)

References 55 publications

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“…, Table ), and these traits were also correlated with outcrossing (Table ). Our findings match previous hypotheses and nonphylogenetically corrected associations between hybridization and woodiness and/or perenniality (Stebbins ; Stace ; Ellstrand et al ; Beddows and Rose ). In our analyses, the links between perenniality/woodiness and our hybridization measures were stronger than links with outcrossing rate (which had only a moderate association with hybridization propensity across families), but this discrepancy may be due to the restricted number of taxa for which we had outcrossing rate data (outcrossing data for 76 families and 158 genera, compared with perenniality and woodiness data for 195 families and 1754 and 1767 genera, respectively, Table and Table ).…”

Section: Discussionsupporting

confidence: 92%

“…Our database was constructed following Ellstrand et al in a way that does not allow for the implementation of this metric, as we did not keep track of parental species. However, we note that the three hybridization metrics can be highly correlated (e.g., Beddows and Rose ) and thus suggest that analyses using hybridization frequency may not detect patterns different from those we report.…”

Section: Discussioncontrasting

confidence: 69%

“…Although taxonomic order was included in the analysis, they did not explicitly account for the phylogenetic nonindependence of the taxa analyzed. In their analysis, hybridization was positively correlated with perenniality, woodiness, habitat disturbance, and number of herbarium records, and they additionally detected significant effects of taxonomic order (Beddows and Rose ).…”

Section: A Review Of the Potential Traits Associated With Hybridizatimentioning

confidence: 97%

“…allowing for the continued propagation of a hybrid lineage after formation. Briefly, we expected that plant groups dominated by perennial species (Grant, , ; Stace ; Ellstrand et al ; Beddows and Rose ) or woody species (Stebbins ; Beddows and Rose ) will contain more hybrids than those dominated by annual or herbaceous life histories, because longer lifespans associated with perenniality and woodiness may allow hybrid individuals to produce offspring over time despite partial sterility, allowing for persistence of these hybrid lineages (Ellstrand et al ). We also expected higher rates of hybridization in plant groups with traits that increase the likelihood of interspecific mating, either by reducing barriers to gene flow or promoting outbreeding.…”

Section: A Review Of the Potential Traits Associated With Hybridizatimentioning

confidence: 99%

“… 1 Grant (); 2 Grant (); 3 Stace (); 4 Ellstrand et al. (); 5 Beddows and Rose (); 6 Stebbins (); 7 Rieseberg and Wendel (); 8 Sargent (); 9 Bureš et al (); 10 Paun et al (); 11 Stelkens and Seehausen (); 12 Mallet (); 13 Mavarez and Linares (); 14 Allard (); 15 Allendorf et al. ().…”

Section: A Review Of the Potential Traits Associated With Hybridizatimentioning

confidence: 99%

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Correlates of hybridization in plants

et al. 2019

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Hybridization is a biological phenomenon increasingly recognized as an important evolutionary process in both plants and animals, as it is linked to speciation, radiation, extinction, range expansion and invasion, and allows for increased trait diversity in agricultural and horticultural systems. Estimates of hybridization frequency vary across taxonomic groups, but causes of this variation are unknown. Here, we ask on a global scale whether hybridization is linked to any of 11 traits related to plant life history, reproduction, genetic predisposition, and environment or opportunity. Given that hybridization is not evenly distributed across the plant tree of life, we use phylogenetic generalized least squares regression models and phylogenetic path analysis to detect statistical associations between hybridization and plant traits at both the family and genus levels. We find that perenniality and woodiness are each weakly associated with an increased frequency of hybridization in univariate analyses, but path analysis suggests that the direct linkage is between perenniality and increased hybridization (with woodiness having only an indirect relationship with hybridization via perenniality). Weak associations between higher rates of hybridization and higher outcrossing rates, abiotic pollination syndromes, vegetative reproductive modes, larger genomes, and less variable genome sizes are detectable in some cases but not others. We argue that correlational evidence at the global scale, such as that presented here, provides a robust framework for forming hypotheses to examine and test drivers of hybridization at a more mechanistic level.

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Section: Discussionsupporting

confidence: 92%

Section: Discussioncontrasting

confidence: 69%

Section: A Review Of the Potential Traits Associated With Hybridizatimentioning

confidence: 97%