Research Topics
| S C H BarrettSummaryAffiliation: University of Toronto Country: Canada Publications
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Detail Information
Publications
The evolution and maintenance of monoecy and dioecy in Sagittaria latifolia (Alismataceae)Marcel E Dorken
Department of Botany, University of Toronto, Ontario, Canada
Evolution 56:31-41. 2002..latifolia is governed by interactions between ecology, life history, and mating...- Mating patterns and genetic diversity in the wild daffodil Narcissus longispathus (Amaryllidaceae)S C H Barrett
Department of Botany, University of Toronto, 25 Willcocks Street, Toronto, Ontario, Canada M5S 3B2
Heredity (Edinb) 92:459-65. 2004..15. The observed patterns of genetic differentiation among populations are likely influenced by the mating system, and a combination of local topography, watershed affinities and gene flow... - Sexual interference of the floral kindS C H Barrett
Department of Botany, University of Toronto, 25 Willcocks Street, Toronto, Ontario, Canada M5S 3B2
Heredity (Edinb) 88:154-9. 2002.... - The evolution of plant sexual diversitySpencer C H Barrett
Department of Botany, University of Toronto, 25 Willcocks Street, Toronto, Ontario, Canada M5S 3B2
Nat Rev Genet 3:274-84. 2002..The integration of phylogenetic, ecological and population-genetic studies have provided new insights into the selective mechanisms that are responsible for major evolutionary transitions between reproductive modes... - Correlated evolution of floral morphology and mating-type frequencies in a sexually polymorphic plantSpencer C H Barrett
Department of Botany, University of Toronto, Toronto, Ontario M5S 3B2, Canada
Evolution 58:964-75. 2004..triandrus. We interpret the L-biased morph ratios and the unusual morphology of N. triandrus as a consequence of its atypical intramorph compatibility system... - The evolution of polymorphic sexual systems in daffodils (Narcissus)Spencer C H Barrett
Department of Botany, University of Toronto, 25 Willcocks Street, Toronto, Ontario M5S 3B2, Canada
New Phytol 165:45-53. 2005..These features are consequences of the unusual association between stylar polymorphism and a self-incompatibility system that permits intramorph mating... 
Mating strategies in flowering plants: the outcrossing-selfing paradigm and beyondSpencer C H Barrett
Department of Botany, University of Toronto, 25 Willcocks Street, Toronto, Ontario M5S 3B2, Canada
Philos Trans R Soc Lond B Biol Sci 358:991-1004. 2003..The scope of future research on mating strategies needs to be broadened to include investigations of functional links among flowers, inflorescences and plant architecture within the framework of life-history evolution...- Mating patterns and demography in the tristylous daffodil Narcissus triandrusK A Hodgins
Department of Botany, University of Toronto, 25 Willcocks Street, Toronto, ON, Canada M5S 3B2
Heredity (Edinb) 96:262-70. 2006..There were no consistent differences among the style morphs in outcrossing or biparental inbreeding indicating that the maintenance of trimorphism vs dimorphism is unlikely to be associated with inbreeding of maternal parents... - Multiple multilocus DNA barcodes from the plastid genome discriminate plant species equally wellAron J Fazekas
Department of Integrative Biology, University of Guelph, Guelph, Ontario, Canada
PLoS ONE 3:e2802. 2008.... - Solving the puzzle of mirror-image flowersLinley K Jesson
Department of Botany, University of Toronto, Ontario, Canada
Nature 417:707. 2002..Here we show that a mendelian locus governs the inheritance of style orientation and that this curious form of sexual asymmetry functions to promote cross-pollination in bee-pollinated plants... - Plant reproductive systems and evolution during biological invasionSpencer C H Barrett
Department of Ecology and Evolutionary Biology, University of Toronto, 25 Willcocks St, Toronto, ON, Canada M5S 3B2
Mol Ecol 17:373-83. 2008..Knowledge of the likelihood and speed at which local adaptation evolves in invasive plants will be particularly important for management practices when evolutionary changes enhance ecological opportunities and invasive spread... - Sexing pollen reveals female bias in a dioecious plantIvana Stehlik
Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, Ontario, Canada
New Phytol 175:185-94. 2007..nivalis, but is insufficient to fully explain the degree of bias... - Pollination intensity influences sex ratios in dioecious Rumex nivalis, a wind-pollinated plantIvana Stehlik
Department of Botany, University of Toronto, 25 Willcocks Street, Toronto, Ontario M5S 3B2, Canada
Evolution 60:1207-14. 2006..96). Our results are the first to demonstrate a functional relation between stigmatic pollen capture, seed set, and sex ratio and suggest that certation can contribute towards female-biased sex ratios in dioecious plants... - High outcrossing in the annual colonizing species Ambrosia artemisiifolia (Asteraceae)Jannice Friedman
Department of Ecology and Evolutionary Biology, University of Toronto, 25 Willcocks St, Toronto, Ontario, Canada
Ann Bot 101:1303-9. 2008..Here, the role of density for the mating system of Ambrosia artemisiifolia (common ragweed), a wind-pollinated annual colonizing species previously reported as self-compatible, is explored... - Population structure and genetic diversity in tristylous Narcissus triandrus: insights from microsatellite and chloroplast DNA variationKathryn A Hodgins
Department of Ecology and Evolutionary Biology, University of Toronto, 25 Willcocks Street, Toronto, ON M5S 3B2, Canada
Mol Ecol 16:2317-32. 2007..M-morph frequencies were positively correlated with differentiation at microsatellite loci, indicating that the evolutionary processes influencing these neutral markers also influence alleles controlling the style morphs... - Environmental influence on primary sex ratio in a dioecious plantIvana Stehlik
Department of Ecology and Evolutionary Biology, University of Toronto, 25 Willcocks Street, Toronto, ON, Canada M5S 3B2
Proc Natl Acad Sci U S A 105:10847-52. 2008..The most probable explanation for biased primary sex ratios in Rumex is selective fertilization resulting from pollen tube competition... 
The population genomics of plant adaptationMathieu Siol
Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, ON, Canada
New Phytol 188:313-32. 2010....- The consequences of monoecy and protogyny for mating in wind-pollinated CarexJannice Friedman
Department of Ecology and Evolutionary Biology, University of Toronto, 25 Willcocks Street, Toronto, Ontario, Canada
New Phytol 181:489-97. 2009..We propose that geitonogamy in self-compatible wind-pollinated species with unisexual flowers may be widespread and provides reproductive assurance... - Wind of change: new insights on the ecology and evolution of pollination and mating in wind-pollinated plantsJannice Friedman
Department of Ecology and Evolutionary Biology, University of Toronto, Ontario, Canada
Ann Bot 103:1515-27. 2009..Finally, it is proposed that geitonogamous selfing may alleviate pollen limitation in many wind-pollinated plants with unisexual flowers... - Mating-system variation, demographic history and patterns of nucleotide diversity in the Tristylous plant Eichhornia paniculataRob W Ness
Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, Ontario M5S 3B2, Canada
Genetics 184:381-92. 2010..Our results suggest that the recent multiple origins of selfing in E. paniculata from diverse outcrossing populations result in higher diversity than expected under long-term equilibrium... - Understanding plant reproductive diversitySpencer C H Barrett
Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, Ontario, Canada
Philos Trans R Soc Lond B Biol Sci 365:99-109. 2010..For each evolutionary transition, I consider what we have discovered and some of the problems that still remain unsolved. I conclude by discussing how new approaches might influence future research in plant reproductive biology... - Darwin's legacy: the forms, function and sexual diversity of flowersSpencer C H Barrett
Department of Ecology and Evolutionary Biology, University of Toronto, 25 Willcocks Street, Toronto, Ontario M5S 3B2, Canada
Philos Trans R Soc Lond B Biol Sci 365:351-68. 2010..This has helped to link work on pollination biology and mating systems, two subfields of reproductive biology that remained largely isolated during much of the twentieth century despite Darwin's efforts towards integration... - Evolutionary constraints on adaptive evolution during range expansion in an invasive plantRobert I Colautti
Department of Ecology and Evolutionary Biology, University of Toronto, 25 Willcocks Street, Toronto, Ontario, Canada
Proc Biol Sci 277:1799-806. 2010..Identifying genetic constraints on key life-history traits can provide novel insights into invasion dynamics and the causes of range limits in introduced species... - Ecological genetics of sex ratios in plant populationsSpencer C H Barrett
Department of Ecology and Evolutionary Biology, University of Toronto, 25 Willcocks Street, Toronto, Ontario, Canada
Philos Trans R Soc Lond B Biol Sci 365:2549-57. 2010.... - Female reproductive success and the evolution of mating-type frequencies in tristylous populationsKathryn A Hodgins
Department of Botany, University of Toronto, 25 Willcocks Street, Toronto, Ontario M5S 3B2, Canada
New Phytol 171:569-80. 2006..Our results suggest that interactions between mating patterns and female fertility are responsible for variation in morph frequencies and loss of the M-morph from tristylous populations of N. triandrus... - Spatial ecology of mating success in a sexually polymorphic plantIvana Stehlik
Department of Botany, University of Toronto, 25 Willcocks Street, Toronto, Ontario M5S 3B2, Canada
Proc Biol Sci 273:387-94. 2006..Mating success in N. assoanus was characterized by both density- and frequency-dependent processes, a condition that may be a general feature of the spatial ecology of plant mating... - The genetics of mirror-image flowersLinley K Jesson
Department of Botany, University of Toronto, 25 Willcocks Street, Toronto, Ontario, Canada M5S 3B2
Proc Biol Sci 269:1835-9. 2002..The simple inheritance of dimorphic enantiostyly has implications for the evolution and maintenance of this unusual sexual polymorphism... - Evolutionary pathways to self-fertilization in a tristylous plant speciesSpencer C H Barrett
Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, Ontario, Canada
New Phytol 183:546-56. 2009..The relatively simple genetic control of herkogamy reduction and frequent colonizing episodes may often create demographic conditions favouring transitions to selfing in E. paniculata... - A theoretical investigation of the evolution and maintenance of mirror-image flowersLinley K Jesson
Department of Botany, University of Toronto, 25 Willcocks Street, Toronto, Ontario M5S 3B2, Canada
Am Nat 161:916-30. 2003.... - Life-history differentiation and the maintenance of monoecy and dioecy in Sagittaria latifolia (Alismataceae)Marcel E Dorken
Department of Botany, University of Toronto, 25 Willcocks Street, Toronto, Ontario, Canada M5S 3B2
Evolution 57:1973-88. 2003..Selection for divergent life histories between monoecious and dioecious populations of S. latifolia appears to be the principal mechanism maintaining the integrity of the two sexual systems in areas of geographic overlap... - Asymmetrical mating patterns and the evolution of biased style-morph ratios in a tristylous daffodilKathryn A Hodgins
Department of Ecology and Evolutionary Biology, University of Toronto, 25 Willcocks Street, Toronto, Ontario, Canada
Genet Res (Camb) 90:3-15. 2008.... - Mechanisms governing sex-ratio variation in dioecious Rumex nivalisIvana Stehlik
Department of Botany, University of Toronto, 25 Willcocks Street, Toronto, Ontario M5S 3B2, Canada
Evolution 59:814-25. 2005..Poor performance of Y1Y2 gametophytes and male sporophytes in R. nivalis may be a consequence of the accumulation of deleterious mutations on Y-sex chromosomes... - Chloroplast haplotype variation among monoecious and dioecious populations of Sagittaria latifolia (Alismataceae) in eastern North AmericaM E Dorken
Department of Botany, University of Toronto, 25 Willcocks Street, ON, M5S 3B2, Canada
Mol Ecol 13:2699-707. 2004..The distribution of cpDNA haplotypes in dioecious populations represents a subset of the variation found in monoecious populations, a pattern expected if dioecy has evolved from monoecy in S. latifolia... - Phylogenetic analysis of the ecological correlates of dioecy in angiospermsJ C Vamosi
Department of Botany, University of Toronto, Toronto, ON Canada, Canada
J Evol Biol 16:1006-18. 2003.... - Division of labour within flowers: heteranthery, a floral strategy to reconcile contrasting pollen fatesM Vallejo-Marín
Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, ON, Canada
J Evol Biol 22:828-39. 2009.... - Perspective: purging the genetic load: a review of the experimental evidencePeter Crnokrak
Department of Botany, University of Toronto, 25 Willcocks Street, Toronto, Ontario, M5S 3B2, Canada
Evolution Int J Org Evolution 56:2347-58. 2002..Further research is required to resolve the discrepancy between the results obtained using different experimental approaches... - Sex determination and the evolution of dioecy from monoecy in Sagittaria latifolia (Alismataceae)Marcel E Dorken
Department of Botany, University of Toronto, 25 Willcocks Street, Toronto, Ontario MSS 3B2, Canada
Proc Biol Sci 271:213-9. 2004..These results are consistent with predictions for the evolution of dioecy via gynodioecy, rather than the expected monoecy-paradioecy pathway, given the ancestral monoecious condition... - Modification of flower architecture during early stages in the evolution of self-fertilizationMario Vallejo-Marín
Department of Ecology and Evolutionary Biology, University of Toronto, 25 Willcocks Street, Toronto, ON, Canada M5S 3B2
Ann Bot 103:951-62. 2009.... - Natural selection on floral traits through male and female function in wild populations of the heterostylous daffodil Narcissus triandrusKathryn A Hodgins
Department of Ecology and Evolutionary Biology, University of Toronto, 25 Willcocks Street, Toronto, ON, Canada
Evolution 62:1751-63. 2008..triandrus was stronger through male than female function probably because floral morphology plays an important role in promoting effective cross-pollen transfer in populations of this heterostylous species... - Pollinator responses to variation in floral display and flower size in dioecious Sagittaria latifolia (Alismataceae)Mélanie Glaettli
Department of Ecology and Evolutionary Biology, 25 Willcocks Street, University of Toronto, Toronto, Canada
New Phytol 179:1193-201. 2008..Small daily floral displays may benefit males by allowing extended flowering periods and greater opportunities for effective pollen dispersal... - Consequences of hierarchical allocation for the evolution of life-history traitsAnne C Worley
Department of Botany, University of Toronto, Toronto, Ontario M5S 3B2, Canada
Am Nat 161:153-67. 2003..Thus, allocation hierarchies can profoundly affect life-history evolution by causing traits to evolve in the opposite direction to that predicted by trade-offs... - Sex in advertising: dioecy alters the net benefits of attractiveness in Sagittaria latifolia (Alismataceae)Jana C Vamosi
Department of Biological Sciences, University of Calgary, Canada
Proc Biol Sci 273:2401-7. 2006..We propose that this could explain why dioecy is strongly correlated with reduced floral display among angiosperm species... - Rooting phylogenetic trees with distant outgroups: a case study from the commelinoid monocotsSean W Graham
Department of Biological Sciences, University of Alberta, Edmonton, Canada
Mol Biol Evol 19:1769-81. 2002..Rooting discriminatory power is shown to be stronger, in general, for more closely related outgroups and is highly correlated among different real outgroups, genes, and optimality criteria... - Frequency-dependent variation in reproductive success in Narcissus: implications for the maintenance of stigma-height dimorphismJohn D Thompson
Centre d Ecologie Fonctionnelle et Evolutive, CNRS, 1919 Route de Mende, 34293 Montpellier Cedex 5, France
Proc Biol Sci 270:949-53. 2003..Our experimental results also provide insights into the mechanisms governing the biased style-morph ratios in populations of Narcissus species... - Botany: specialized bird perch aids cross-pollinationBruce Anderson
School of Botany and Zoology, University of KwaZulu-Natal, Private Bag X01, Scottsville, Pietermaritzburg 3209, South Africa
Nature 435:41-2. 2005..We find that this structure promotes the plant's mating success by causing the malachite sunbird (Nectarinia famosa), its main pollinator, to adopt a position ideal for the cross-pollination of its unusual ground-level flowers... - Herkogamy and mating patterns in the self-compatible daffodil Narcissus longispathusMónica Medrano
Estacion Biologica de Donana, Consejo Superior de Investigaciones Cientificas, E 41013 Sevilla, Spain
Ann Bot 95:1105-11. 2005.... - Whither plant evo-devo?William E Friedman
Department of Ecology and Evolutionary Biology, University of Colorado, Boulder, CO 80309, USA
New Phytol 178:468-72. 2008 - Reproductive consequences of interactions between clonal growth and sexual reproduction in Nymphoides peltata: a distylous aquatic plantYong Wang
Laboratory of Plant Systematics and Evolutionary Biology, College of Life Sciences, Wuhan University, Wuhan 430072, Hubei, China
New Phytol 165:329-35. 2005..peltata we found no evidence for evolutionary changes to the heterostylous syndrome, as reported in Nymphoides, including populations of N. peltata in other parts of its geographical range...