Research Topics
| L H RiesebergSummaryAffiliation: Indiana University Country: USA Publications
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Publications
Directional selection is the primary cause of phenotypic diversificationLoren H Rieseberg
Department of Biology, Indiana University, Bloomington, IN 47405 3700, USA
Proc Natl Acad Sci U S A 99:12242-5. 2002....
Evolution. Chromosomal speciation in primatesLoren H Rieseberg
Biology Department, Indiana University, Bloomington, IN 47405, USA
Science 300:267-8. 2003
Polyploid evolution: keeping the peace at genomic reunionsL H Rieseberg
Department of Biology, Indiana University, Bloomington, IN 47405, USA
Curr Biol 11:R925-8. 2001..But recent studies suggest that the elimination of DNA sequences and alteration of DNA methylation patterns may permit the restoration of fertility in some allopolyploids...
Major ecological transitions in wild sunflowers facilitated by hybridizationLoren H Rieseberg
Department of Biology, Indiana University, Bloomington, IN 47405, USA
Science 301:1211-6. 2003..The same combinations of parental chromosomal segments required to generate extreme phenotypes in synthetic hybrids also occurred in ancient hybrids. Thus, hybridization facilitated ecological divergence in sunflowers...
Hybridization and the colonization of novel habitats by annual sunflowersLoren H Rieseberg
Department of Biology, Indiana University, Bloomington, IN 47405, USA
Genetica 129:149-65. 2007..This body of work corroborates earlier claims regarding the role of hybridization in adaptive evolution and provides an experimental and conceptual framework for ongoing studies in this area...
The nature of plant speciesLoren H Rieseberg
Department of Biology, Indiana University, Bloomington, Indiana 47405, USA
Nature 440:524-7. 2006..Contrary to conventional wisdom, plant species are more likely than animal species to represent reproductively independent lineages...
Transgressive segregation, adaptation and speciationL H Rieseberg
Department of Biology, Indiana University, Bloomington, IN 47405, USA
Heredity (Edinb) 83:363-72. 1999..These results lend credence to the view that hybridization may provide the raw material for rapid adaptation and provide a simple explanation for niche divergence and phenotypic novelty often associated with hybrid lineages...
Genetic architecture of species differences in annual sunflowers: implications for adaptive trait introgressionS C Kim
Department of Biology, Indiana University, Bloomington, Indiana 47405, USA
Genetics 153:965-77. 1999..texanus. Subsequent work will test for the occurrence and fitness consequences of the identified QTL in natural populations of ssp. texanus...
The contribution of epistasis to species differences in annual sunflowersS C Kim
Department of Biology, Indiana University, Bloomington, IN 47405, USA
Mol Ecol 10:683-90. 2001..The implications of these findings for adaptive evolution and for the introgression of advantageous morphological QTLs across a natural hybrid zone between these taxa are discussed...
Hybrid zones and the genetic architecture of a barrier to gene flow between two sunflower speciesL H Rieseberg
Department of Biology, Indiana University, Bloomington, Indiana 47405, USA
Genetics 152:713-27. 1999..These results demonstrate the utility of hybrid zones for identifying factors contributing to isolation and verify the prediction of increased resolution relative to controlled crosses...
Rampant gene exchange across a strong reproductive barrier between the annual sunflowers, Helianthus annuus and H. petiolarisYoko Yatabe
Department of Biology, Indiana University, Bloomington, Indiana 47405, USA
Genetics 175:1883-93. 2007..In general, these results indicate that even strong and genetically complex reproductive barriers cannot prevent widespread introgression...
Extensive chromosomal repatterning and the evolution of sterility barriers in hybrid sunflower speciesZhao Lai
Department of Biology, Indiana University, Bloomington, Indiana 47405, USA
Genetics 171:291-303. 2005..Finally, pollen and seed fertility estimates for F1's between the hybrid and parental species fall below 11%, which is sufficient for evolutionary independence of the hybrid neospecies...
The likelihood of homoploid hybrid speciationC A Buerkle
Department of Biology, Indiana University, Bloomington, IN 47405, USA
Heredity (Edinb) 84:441-51. 2000..Our results confirmed the importance of the combination of factors that had been emphasized in verbal models and illustrate the trade-off between the frequency at which hybrid species arise and the genetic integrity of incipient species...
The role of recently derived FT paralogs in sunflower domesticationBenjamin K Blackman
Department of Biology, Indiana University, Bloomington, IN 47405, USA
Curr Biol 20:629-35. 2010..Our findings also illustrate the important role that evolving interactions between new gene family members may play in fostering phenotypic change...
Microarray analysis reveals differential gene expression in hybrid sunflower speciesZhao Lai
Department of Biology, Indiana University, Bloomington, IN 47405, USA
Mol Ecol 15:1213-27. 2006..deserticola habitat. One gene (a G protein-coupled receptor) had a significant association with fitness and maps close to a QTL controlling traits that may be adaptive in the desert habitat...
Sex determination in the androdioecious plant Datisca glomerata and its dioecious sister species D. cannabinaD E Wolf
Department of Biology, Indiana University, Bloomington, Indiana 47405 3700, USA
Genetics 159:1243-57. 2001..This comparative approach suggests that the hermaphrodite form arose in a dioecious population from a recessive mutation that allowed females to produce pollen...
Microsatellite signature of ecological selection for salt tolerance in a wild sunflower hybrid species, Helianthus paradoxusCécile Edelist
Department of Biology, Indiana University, Bloomington, IN 47405, USA
Mol Ecol 15:4623-34. 2006..In contrast, no difference in diversity levels was observed between the two microsatellite classes in parental populations...
Comparative genomic and population genetic analyses indicate highly porous genomes and high levels of gene flow between divergent helianthus speciesNolan C Kane
Department of Biology, Indiana University, Bloomington, Indiana, USA
Evolution 63:2061-75. 2009....
Genetic architecture of a selection response in Arabidopsis thalianaMark C Ungerer
Department of Biology, Indiana University, Bloomington, Indiana 47405, USA
Evolution 57:2531-9. 2003..This study demonstrates how QTL mapping approaches can be combined with map-based population genetic data to study how selection acts on standing genetic variation in populations...
Patterns of genetic diversity and candidate genes for ecological divergence in a homoploid hybrid sunflower, Helianthus anomalusYuval Sapir
Department of Biology, Indiana University, Bloomington, IN 47405, USA
Mol Ecol 16:5017-29. 2007..Finally, our data suggest that selective sweeps may have united populations of H. anomalus isolated by a mountain range, indicating that even low gene-flow species may be held together by the spread of advantageous alleles...
The ecological genetics of homoploid hybrid speciationB L Gross
Department of Biology, 1001 E 3rd Street, Jordan Hall 142, Indiana University, Bloomington, IN 47405, USA
J Hered 96:241-52. 2005..Overall, theory and empirical evidence gathered to date suggest that ecological selection is a major factor promoting homoploid hybrid speciation, with the strongest evidence coming from genetic studies...
Natural selection for salt tolerance quantitative trait loci (QTLs) in wild sunflower hybrids: implications for the origin of Helianthus paradoxus, a diploid hybrid speciesC Lexer
Department of Biology, Jordan Hall 142, 1001 East Third Street, Indiana University, Bloomington, IN 47405, USA
Mol Ecol 12:1225-35. 2003..paradoxus. Finally, selection coefficients of +0.126, -0.084 and -0.094 for the three survivorship QTLs, respectively, are sufficiently large to account for establishment of new, homoploid hybrid species...
Low intraspecific variation for genomic isolation between hybridizing sunflower speciesC A Buerkle
Department of Biology, Indiana University, Bloomington 47405, USA
Evolution 55:684-91. 2001..The observed consistency of introgression patterns across distantly separated hybrid zones suggests that intrinsic forces predominate in determining hybrid zone dynamics and boundaries between these sunflower species...
Crossing relationships among ancient and experimental sunflower hybrid lineagesL H Rieseberg
Department of Biology, Indiana University, Bloomington 47405, USA
Evolution 54:859-65. 2000..These observations not only indicate that reproductive isolation can arise as a by-product of fertility selection in hybrid populations, but also testify to the repeatability of this mode of speciation...
Identification and mapping of SNPs from ESTs in sunflowerZ Lai
Department of Biology and Center for Genomics and Bioinformatics, Indiana University, Bloomington, IN 47405, USA
Theor Appl Genet 111:1532-44. 2005....
Evolutionary changes over the fifty-year history of a hybrid population of sunflowers (Helianthus)S E Carney
Department of Biology, Indiana University, Bloomington 47405, USA
Evolution 54:462-74. 2000..The trends seen in this hybrid population over the past 50 years suggest that H. bolanderi is undergoing genetic assimilation, and this trend may be representative of its fate throughout its range...
How robust are "isolation with migration" analyses to violations of the im model? A simulation studyJared L Strasburg
Department of Biology, Indiana University, USA
Mol Biol Evol 27:297-310. 2010....
SCARF: maximizing next-generation EST assemblies for evolutionary and population genomic analysesMichael S Barker
Botany Department, University of British Columbia, Vancouver, B C V6T 1Z4, Canada
Bioinformatics 25:535-6. 2009..AVAILABILITY: SCARF is freely available at http://msbarker.com/software.htm, and is released under the open source GPLv3 license (http://www.opensource.org/licenses/gpl-3.0.html...
Genetic map-based analysis of genome structure in the homosporous fern Ceratopteris richardiiTakuya Nakazato
Department of Biology, Indiana University, Bloomington, Indiana 47405 7005, USA
Genetics 173:1585-97. 2006..richardii. Alternatively, evidence of past polyploidization(s) may be masked by extensive chromosomal rearrangements as well as smaller-scale duplications and deletions following polyploidization(s)...
Multiple paleopolyploidizations during the evolution of the Compositae reveal parallel patterns of duplicate gene retention after millions of yearsMichael S Barker
Department of Botany, University of British Columbia, Vancouver, British Columbia, Canada
Mol Biol Evol 25:2445-55. 2008....
Using variable rate models to identify genes under selection in sequence pairs: their validity and limitations for EST sequencesSheri A Church
Department of Biology, Indiana University, Bloomington, IN 47405, USA
J Mol Evol 64:171-80. 2007..We discuss the validity and limitations of using variable rate models for comparisons of sequence pairs, as well as the limitations of using ESTs for identification of positively selected genes...
Natural variation in gene expression between wild and weedy populations of Helianthus annuusZhao Lai
Department of Biology, Indiana University, Bloomington, IN 47405, USA
Genetics 179:1881-90. 2008....
Selective sweeps reveal candidate genes for adaptation to drought and salt tolerance in common sunflower, Helianthus annuusNolan C Kane
Department of Biology, Indiana University, Bloomington, Indiana 47405, USA
Genetics 175:1823-34. 2007..Thus, this study illustrates how selective sweeps might contribute both to the integration of conspecific populations and to the differentiation of races or species...
A genomewide study of reproductive barriers between allopatric populations of a homosporous fern, Ceratopteris richardiiTakuya Nakazato
Department of Biology, Indiana University, Bloomington, Indiana 47405 7005, USA
Genetics 177:1141-50. 2007....
Genetics and evolution of weedy Helianthus annuus populations: adaptation of an agricultural weedNolan C Kane
Department of Biology, Jordan Hall, 1001 E Third Street, Indiana University, Bloomington, Indiana 47405, USA
Mol Ecol 17:384-94. 2008..Together, our results point to the relative ease with which weedy forms of this species can evolve and persist despite the potentially high levels of geneflow with nearby wild populations...
Molecular demographic history of the annual sunflowers Helianthus annuus and H. petiolaris--large effective population sizes and rates of long-term gene flowJared L Strasburg
Department of Biology, Indiana University, 915 E 3rd Street 150, Bloomington, Indiana 47405, USA
Evolution 62:1936-50. 2008....
Genomic patterns of adaptive divergence between chromosomally differentiated sunflower speciesJared L Strasburg
Department of Biology, Indiana University, Bloomington, Indiana, USA
Mol Biol Evol 26:1341-55. 2009....
Hybridization and genome size evolution: timing and magnitude of nuclear DNA content increases in Helianthus homoploid hybrid speciesEric J Baack
Department of Biology, Indiana University, 1001 East Third Street, Bloomington, IN 47405, USA
New Phytol 167:623-30. 2005..In summary, hybridization by itself does not lead to increased nuclear DNA content in Helianthus, and the evolutionary forces responsible for the repeated increases in DNA content seen in the hybrid-derived species remain mysterious...
How species evolve collectively: implications of gene flow and selection for the spread of advantageous allelesCarrie L Morjan
Department of Biology, Indiana University, Bloomington, IN 47405, USA
Mol Ecol 13:1341-56. 2004..Thus, species may evolve collectively at major loci through the spread of favourable alleles, while simultaneously differentiating at other loci due to drift and local selection...
The genetic architecture necessary for transgressive segregation is common in both natural and domesticated populationsLoren H Rieseberg
Department of Biology, Indiana University, 1001 E 3rd Street, Bloomington, IN 47405, USA
Philos Trans R Soc Lond B Biol Sci 358:1141-7. 2003....
Reconstructing the origin of Helianthus deserticola: survival and selection on the desert floorBriana L Gross
Department of Biology, Indiana University, Bloomington, Indiana 47405, USA
Am Nat 164:145-56. 2004..deserticola phenotype. Thus, H. deserticola may have originated from habitat-mediated directional selection acting on hybrids between H. annuus and H. petiolaris in a desert environment...
The origin of ecological divergence in Helianthus paradoxus (Asteraceae): selection on transgressive characters in a novel hybrid habitatChristian Lexer
Indiana University, Department of Biology, Jordan Hall 325, Bloomington, Indiana 47405, USA
Evolution 57:1989-2000. 2003..annuus and H. petiolaris. These results are consistent with the hypothesis that transgressive segregation of elemental uptake and leaf succulence contributed to the origin of salt adaptation in the diploid hybrid species H. paradoxus...
Patterns of genetic variation suggest a single, ancient origin for the diploid hybrid species Helianthus paradoxusMark E Welch
Department of Biology, Indiana University, 1001 East Third Street, Bloomington, Indiana 47405, USA
Evolution 56:2126-37. 2002..annuus, such as large migratory mammals...
Genetic analysis of sunflower domesticationJohn M Burke
Department of Biology, Indiana University, Bloomington, IN 47405, USA
Genetics 161:1257-67. 2002..None of the other traits show similar evidence of selection. The occurrence of numerous wild alleles with cultivar-like effects, combined with the lack of major QTL, suggests that sunflower was readily domesticated...
Parallel genotypic adaptation: when evolution repeats itselfTroy E Wood
Indiana University, 1001 E Third St, Jordan Hall 142, Bloomington, IN 47405, USA
Genetica 123:157-70. 2005....
Origin of extant domesticated sunflowers in eastern North AmericaAbigail V Harter
Department of Biology, Indiana University, Bloomington, Indiana 47405, USA
Nature 430:201-5. 2004..We show that extant domesticates arose in eastern North America, with a substantial genetic bottleneck occurring during domestication...
Possible consequences of genes of major effect: transient changes in the G-matrixA F Agrawal
Department of Biology, Indiana University, Bloomington 47405-3700, USA
Genetica 112:33-43. 2001....
Two independent loci control agamospermy (Apomixis) in the triploid flowering plant Erigeron annuusR D Noyes
Department of Biology, Indiana University, Bloomington, Indiana 47405, USA
Genetics 155:379-90. 2000..These results may have major implications for attempts to manipulate agamospermy for agricultural purposes and for interpreting the evolution of the trait...
Selective sweeps in the homoploid hybrid species Helianthus deserticola: evolution in concert across populations and across originsBriana L Gross
Department of Biology, Indiana University, Bloomington, Indiana 47405, USA
Mol Ecol 16:5246-58. 2007..Only one population of H. deserticola showed candidate sweeps that were unique compared to the rest of the species, and this population has also potentially experienced recent admixture with the parental species...
Maize genetics: the treasure of the Sierra MadreNolan C Kane
Department of Biology, Indiana University, Bloomington, Indiana 47405, USA
Curr Biol 15:R137-9. 2005..Massive morphological changes occurred during the domestication of maize from wild teosinte. Some of the most important shifts are due to altered expression patterns of major regulatory genes...
Effects of genetic background on response to selection in experimental populations of Arabidopsis thalianaMark C Ungerer
Department of Biology, Indiana University, Bloomington, Indiana 47405, USA
Genetics 163:277-86. 2003..These results are most consistent with models of adaptive evolution in which allelic fitnesses are not strongly influenced by genetic background and only infrequently change in sign due to variation at other loci...
Rice genomes: a grainy view of future evolutionary researchKevin Livingstone
Department of Biology, 142 Jordan Hall, Indiana University, Bloomington 47405, USA
Curr Biol 12:R470-1. 2002..The draft genome sequences from two subspecies of rice are powerful new tools for gene discovery in the grasses. Genome-wide comparisons of gene content and order will also shed new light on evolutionary processes...
Ecological selection maintains cytonuclear incompatibilities in hybridizing sunflowersJulianno B M Sambatti
Department of Botany, University of British Columbia, 3529 6270 University Blvd, Vancouver, BC, Canada V6T1Z4
Ecol Lett 11:1082-91. 2008..Our results suggest a common means by which ecological selection may contribute to speciation and have significant implications for the persistence of hybridizing species...
Selection on domestication traits and quantitative trait loci in crop-wild sunflower hybridsEric J Baack
Department of Botany, University of British Columbia, 6270 W University Blvd, Vancouver, BC, Canada V6T 1Z4
Mol Ecol 17:666-77. 2008..These results indicate that crop trait values and alleles may sometimes be favoured in a noncrop environment and across broad geographical regions...
Fitness effects of transgenic disease resistance in sunflowersJohn M Burke
Department of Biological Sciences, Vanderbilt University, Nashville, TN 37235-1634, USA
Science 300:1250. 2003
The rate of genome stabilization in homoploid hybrid speciesC Alex Buerkle
Department of Botany, 1000 E University Ave, University of Wyoming, Laramie, Wyoming 82071, USA
Evolution 62:266-75. 2008..Our modeling of genome stabilization provides an upper bound for the time interval for reproductive isolation to be established and confirms the rapid nature of homoploid hybrid speciation...
Genetics of intrinsic postzygotic isolation in a circumpolar plant species, Draba nivalis (Brassicaceae)Inger Skrede
National Centre for Biosystematics, Natural History Museum, University of Oslo, NO 0318 Oslo, Norway
Evolution 62:1840-51. 2008..The results imply that multiple genetic mechanisms underlie the rapid evolution of reproductive barriers in Draba...
High biological species diversity in the arctic floraHanne Hegre Grundt
National Centre for Biosystematics, Natural History Museum, University of Oslo, P.O. Box 1172, Blindern NO-0318 Oslo, Norway
Proc Natl Acad Sci U S A 103:972-5. 2006....
Re-creating ancient hybrid species' complex phenotypes from early-generation synthetic hybrids: three examples using wild sunflowersDavid M Rosenthal
Department of Plant Biology, University of Georgia, Athens, Georgia 30602 7271, USA
Am Nat 166:26-41. 2005..Our results demonstrate past hybridization could have generated hybrid species-like multitrait phenotypes suitable for persistence in their respective environments in just three generations after initial hybridization...
Genetic consequences of selection during the evolution of cultivated sunflowerJohn M Burke
Department of Biological Sciences, Vanderbilt University, VU Station B 351634, Nashville, TN 37235, USA
Genetics 171:1933-40. 2005..Strong directional selection in concert with genetic hitchhiking therefore offers a possible explanation for the occurrence of numerous domestication-related QTL with apparently maladaptive phenotypic effects...
Selection on leaf ecophysiological traits in a desert hybrid Helianthus species and early-generation hybridsFulco Ludwig
Department of Plant Biology, 2502 Plant Sciences Building, University of Georgia, Athens, Georgia 30602 7271, USA
Evolution 58:2682-92. 2004....
Genetic architecture of leaf ecophysiological traits in HelianthusLarry C Brouillette
Department of Plant Biology, University of Georgia, Athens, GA 30602, USA
J Hered 98:142-6. 2007..We speculate that the genetic architecture underlying leaf nitrogen may have facilitated the colonization of active desert sand dunes by H. anomalus...
Genetics of species differences in the wild annual sunflowers, Helianthus annuus and H. petiolarisChristian Lexer
Jodrell Laboratory, Royal Botanic Gardens, Kew, Richmond, Surrey, UK
Genetics 169:2225-39. 2005..Our results inform the genetics of species differences in Helianthus and suggest an approach for the simultaneous mapping of inter- and intraspecific QTL...
Reconstructing the history of selection during homoploid hybrid speciationSophie Karrenberg
Institute of Integrative Biology, Eidgenossische Technische Hochschule Zurich, Zurich, Switzerland
Am Nat 169:725-37. 2007..This study presents a new method to test for selection and supports earlier claims that fertility selection and phenotypic selection on ecologically relevant traits have operated simultaneously during sunflower hybrid speciation...
Plant speciationLoren H Rieseberg
Department of Botany, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
Science 317:910-4. 2007..Finally, species richness in plants is correlated with many biological and geohistorical factors, most of which increase ecological opportunities...
Comparative mapping and rapid karyotypic evolution in the genus helianthusJohn M Burke
Department of Biological Sciences, Vanderbilt University, Nashville, Tennessee 37235, USA
Genetics 167:449-57. 2004..5-7.3 chromosomal rearrangements per million years of evolution, the highest rate reported for any taxonomic group to date...
Adaptive evolution: the legacy of past giantsHannes Dempewolf
Department of Botany, University of British Columbia, Vancouver, British Columbia, Canada
Curr Biol 17:R773-4. 2007..The wire syndrome shared by plants in New Zealand and Madagascar appears to have evolved convergently as a defence against herbivory from now extinct avian giants...
A genomic view of introgression and hybrid speciationEric J Baack
Department of Botany, University of British Columbia, Vancouver, BC, Canada
Curr Opin Genet Dev 17:513-8. 2007....
