Supergenes and Their Role in Evolution
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A Supergene-Linked Estrogen Receptor Drives Alternative Phenotypes in a Polymorphic Songbird
A supergene-linked estrogen receptor drives alternative phenotypes in a polymorphic songbird Jennifer R. Merritta,1, Kathleen E. Grogana, Wendy M. Zinzow-Kramera, Dan Sunb, Eric A. Ortlundc, Soojin V. Yib, and Donna L. Maneya aDepartment of Psychology, Emory University, Atlanta, GA 30322; bSchool of Biological Sciences, Georgia Institute of Technology, Atlanta, GA 30332; and cDepartment of Biochemistry, Emory University, Atlanta, GA 30322 Edited by Gene E. Robinson, University of Illinois at Urbana–Champaign, Urbana, IL, and approved July 8, 2020 (received for review June 3, 2020) Behavioral evolution relies on genetic changes, yet few behaviors tan-striped (TS) morph are homozygous for the standard ar- can be traced to specific genetic sequences in vertebrates. Here we rangement, ZAL2 (13, 14) (Fig. 1A). The rearrangement is provide experimental evidence showing that differentiation of a maintained in the population because of the species’ unique dis- single gene has contributed to the evolution of divergent behav- assortative mating system; nearly every breeding pair consists of ioral phenotypes in the white-throated sparrow, a common back- one individual of each morph (15). Because almost all WS birds yard songbird. In this species, a series of chromosomal inversions are heterozygous for ZAL2m (15, 16), this mating system keeps has formed a supergene that segregates with an aggressive phe- ZAL2m in a near-constant state of heterozygosity (Fig. 1B), pro- notype. The supergene has captured ESR1, the gene that encodes foundly suppressing recombination and causing it to differentiate estrogen receptor α (ERα); as a result, this gene is accumulating from ZAL2 (15, 17). changes that now distinguish the supergene allele from the stan- The rearranged region of ZAL2m in white-throated sparrows dard allele. -
Kinetic Effects of Temperature on Rates of Genetic Divergence and Speciation Andrew P
Kinetic effects of temperature on rates of genetic divergence and speciation Andrew P. Allen*†, James F. Gillooly‡, Van M. Savage§, and James H. Brown†¶ *National Center for Ecological Analysis and Synthesis, 735 State Street, Suite 300, Santa Barbara, CA 93101; ‡Department of Zoology, University of Florida, Gainesville, FL 32611; §Bauer Center for Genomics Research, Harvard University, Boston, MA 02138; and ¶Department of Biology, University of New Mexico, Albuquerque, NM 87131 Contributed by James H. Brown, May 2, 2006 Latitudinal gradients of biodiversity and macroevolutionary dy- dependence of mass-specific metabolic rate, B (J⅐secϪ1⅐gϪ1) namics are prominent yet poorly understood. We derive a model (12–14): that quantifies the role of kinetic energy in generating biodiver- Ϫ1/4 ϪE/kT ϪE/kT sity. The model predicts that rates of genetic divergence and B ϭ B͞M ϭ boM e ϭ Boe , [1] speciation are both governed by metabolic rate and therefore Ϫ1 show the same exponential temperature dependence (activation where B is individual metabolic rate (J sec ), M is body mass (g), ؋ 10؊19 J). Predictions are T is absolute temperature (K), Bo is a normalization parameter 1.602 ؍ energy of Ϸ0.65 eV; 1 eV Ϫ1 Ϫ1 supported by global datasets from planktonic foraminifera for independent of temperature (J⅐sec ⅐g ) that varies with body Ϫ1/4 rates of DNA evolution and speciation spanning 30 million years. size as Bo ϭ boM (12), and bo is a normalization parameter As predicted by the model, rates of speciation increase toward the independent of body size and temperature that varies among tropics even after controlling for the greater ocean coverage at taxonomic and functional groups (12, 17). -
Taxa Named in Honor of Ihsan A. Al-Shehbaz
TAXA NAMED IN HONOR OF IHSAN A. AL-SHEHBAZ 1. Tribe Shehbazieae D. A. German, Turczaninowia 17(4): 22. 2014. 2. Shehbazia D. A. German, Turczaninowia 17(4): 20. 2014. 3. Shehbazia tibetica (Maxim.) D. A. German, Turczaninowia 17(4): 20. 2014. 4. Astragalus shehbazii Zarre & Podlech, Feddes Repert. 116: 70. 2005. 5. Bornmuellerantha alshehbaziana Dönmez & Mutlu, Novon 20: 265. 2010. 6. Centaurea shahbazii Ranjbar & Negaresh, Edinb. J. Bot. 71: 1. 2014. 7. Draba alshehbazii Klimeš & D. A. German, Bot. J. Linn. Soc. 158: 750. 2008. 8. Ferula shehbaziana S. A. Ahmad, Harvard Pap. Bot. 18: 99. 2013. 9. Matthiola shehbazii Ranjbar & Karami, Nordic J. Bot. doi: 10.1111/j.1756-1051.2013.00326.x, 10. Plocama alshehbazii F. O. Khass., D. Khamr., U. Khuzh. & Achilova, Stapfia 101: 25. 2014. 11. Alshehbazia Salariato & Zuloaga, Kew Bulletin …….. 2015 12. Alshehbzia hauthalii (Gilg & Muschl.) Salariato & Zuloaga 13. Ihsanalshehbazia Tahir Ali & Thines, Taxon 65: 93. 2016. 14. Ihsanalshehbazia granatensis (Boiss. & Reuter) Tahir Ali & Thines, Taxon 65. 93. 2016. 15. Aubrieta alshehbazii Dönmez, Uǧurlu & M.A.Koch, Phytotaxa 299. 104. 2017. 16. Silene shehbazii S.A.Ahmad, Novon 25: 131. 2017. PUBLICATIONS OF IHSAN A. AL-SHEHBAZ 1973 1. Al-Shehbaz, I. A. 1973. The biosystematics of the genus Thelypodium (Cruciferae). Contrib. Gray Herb. 204: 3-148. 1977 2. Al-Shehbaz, I. A. 1977. Protogyny, Cruciferae. Syst. Bot. 2: 327-333. 3. A. R. Al-Mayah & I. A. Al-Shehbaz. 1977. Chromosome numbers for some Leguminosae from Iraq. Bot. Notiser 130: 437-440. 1978 4. Al-Shehbaz, I. A. 1978. Chromosome number reports, certain Cruciferae from Iraq. -
Stance As Nonself Initiates a Complex Cascade of Events Which
JOURNAL OF SURGICAL RESEARCH 39, l72- 18 1 ( 1985) CURRENT RESEARCH REVIEW Major Histocompatibility Complex Regulation of the Immune Response DAVID H. GUTMANN, PH.D., AND JOHN E. NIEDERHUBER, M.D. Departments of Microbiology and Immunology and Surgery, The University of Michigan Medical School, Ann Arbor, Michigan 48109 Submitted for publication July 18, 1984 The ability of an organism to distinguish self from nonself is determined by a cluster of genes located in the major histocompatibility complex. Recent advances in molecular genetics and cellular immunology have begun to elucidate the mechanisms responsible for immune response regulation. In this review article, the genetic organization of the murine and human major histocompatibility complexes and the manner by which their gene products modulate immune responsiveness are discussed. 0 1985 Academic Press. Inc. INTRODUCTION ulate the immune response in several ways. Whether this regulation is their primary The body’s recognition of a foreign sub- function is not clear, as it seemspossible that stance as nonself initiates a complex cascade other as yet undiscovered levels of regulation of events which leads to an immune response. of the immune response may exist. Since Regulation of this immune response is con- much of our understanding of the role of the trolled by a cluster of tightly linked genes MHC in immune regulation has resulted encoded within the major histocompatibility from studies on the mouse MHC, the struc- complex (MHC) [ 1, 21. While the MHC was ture and function of both mouse and, when originally defined as the site for control of available, human MHC molecules will be graft rejection, it is now known that MHC discussed in this review. -
Chromosomal Rearrangements Maintain a Polymorphic Supergene Controlling Butterfly Mimicry
Published in which should be cited to refer to this work. Chromosomal rearrangements maintain a polymorphic supergene controlling butterfly mimicry Mathieu Joron1,2,3, Lise Frezal1*, Robert T. Jones4*, Nicola L. Chamberlain4, Siu F. Lee5, Christoph R. Haag6, Annabel Whibley1, Michel Becuwe2, Simon W. Baxter7, Laura Ferguson7, Paul A. Wilkinson4, Camilo Salazar8, Claire Davidson9, Richard Clark9, Michael A. Quail9, Helen Beasley9, Rebecca Glithero9, Christine Lloyd9, Sarah Sims9, Matthew C. Jones9, Jane Rogers9, Chris D. Jiggins7 & Richard H. ffrench-Constant4 Supergenes are tight clusters of loci that facilitate the co-segregation be tightly linked from the outset or whether the association between of adaptive variation, providing integrated control of complex elements can be acquired, either gradually or in a single mutational adaptive phenotypes1. Polymorphic supergenes, in which specific step7–10,16–19. Chromosomal rearrangements, which can bring genes into combinations of traits are maintained within a single population, closer physical association and influence local recombination, offer one were first described for ‘pin’ and ‘thrum’ floral types in Primula1 and route through which supergenes may be assembled from more loosely Fagopyrum2, but classic examples are also found in insect mimicry3–5 linked components7,8,17–19. Although there are many cases of poly- and snail morphology6. Understanding the evolutionary mechan- morphic inversions associated with adaptive variation12,20, variation is isms that generate these co-adapted gene sets, as well as the mode in most cases geographical, rather than being maintained within popula- of limiting the production of unfit recombinant forms, remains a tions, and effects on local adaptation are cumulative. In contrast, super- substantial challenge7–10. -
Supergene Evolution Triggered by the Introgression of a Chromosomal Inversion
Report Supergene Evolution Triggered by the Introgression of a Chromosomal Inversion Graphical Abstract Authors Paul Jay, Annabel Whibley, Lise Frezal, ..., James Mallet, Kanchon K. Dasmahapatra, Mathieu Joron Correspondence [email protected] (P.J.), [email protected] (M.J.) In Brief Supergenes are genetic architectures underlying complex polymorphisms in many organisms. Jay et al. show that a supergene controlling mimicry polymorphism in a butterfly was formed by the introgression of a chromosomal inversion from another species. Their results emphasize the role of hybridization in the evolution of novel genetic architectures. Highlights d Chromosomal inversions underlie wing-pattern polymorphism in a Heliconius butterfly d Inversion was introgressed from another species, then maintained as a polymorphism d 1.3 Ma of evolution in separate taxa explains the divergence of supergene haplotypes d Introgression may play a key role in the formation of novel genetic architectures Jay et al., 2018, Current Biology 28, 1–7 June 4, 2018 ª 2018 Elsevier Ltd. https://doi.org/10.1016/j.cub.2018.04.072 Please cite this article in press as: Jay et al., Supergene Evolution Triggered by the Introgression of a Chromosomal Inversion, Current Biology (2018), https://doi.org/10.1016/j.cub.2018.04.072 Current Biology Report Supergene Evolution Triggered by the Introgression of a Chromosomal Inversion Paul Jay,1,* Annabel Whibley,2 Lise Frezal, 3 Marı´aA´ ngeles Rodrı´guez de Cara,1 Reuben W. Nowell,4 James Mallet,5 Kanchon K. Dasmahapatra,6 and -
Illustrated Flora of East Texas Illustrated Flora of East Texas
ILLUSTRATED FLORA OF EAST TEXAS ILLUSTRATED FLORA OF EAST TEXAS IS PUBLISHED WITH THE SUPPORT OF: MAJOR BENEFACTORS: DAVID GIBSON AND WILL CRENSHAW DISCOVERY FUND U.S. FISH AND WILDLIFE FOUNDATION (NATIONAL PARK SERVICE, USDA FOREST SERVICE) TEXAS PARKS AND WILDLIFE DEPARTMENT SCOTT AND STUART GENTLING BENEFACTORS: NEW DOROTHEA L. LEONHARDT FOUNDATION (ANDREA C. HARKINS) TEMPLE-INLAND FOUNDATION SUMMERLEE FOUNDATION AMON G. CARTER FOUNDATION ROBERT J. O’KENNON PEG & BEN KEITH DORA & GORDON SYLVESTER DAVID & SUE NIVENS NATIVE PLANT SOCIETY OF TEXAS DAVID & MARGARET BAMBERGER GORDON MAY & KAREN WILLIAMSON JACOB & TERESE HERSHEY FOUNDATION INSTITUTIONAL SUPPORT: AUSTIN COLLEGE BOTANICAL RESEARCH INSTITUTE OF TEXAS SID RICHARDSON CAREER DEVELOPMENT FUND OF AUSTIN COLLEGE II OTHER CONTRIBUTORS: ALLDREDGE, LINDA & JACK HOLLEMAN, W.B. PETRUS, ELAINE J. BATTERBAE, SUSAN ROBERTS HOLT, JEAN & DUNCAN PRITCHETT, MARY H. BECK, NELL HUBER, MARY MAUD PRICE, DIANE BECKELMAN, SARA HUDSON, JIM & YONIE PRUESS, WARREN W. BENDER, LYNNE HULTMARK, GORDON & SARAH ROACH, ELIZABETH M. & ALLEN BIBB, NATHAN & BETTIE HUSTON, MELIA ROEBUCK, RICK & VICKI BOSWORTH, TONY JACOBS, BONNIE & LOUIS ROGNLIE, GLORIA & ERIC BOTTONE, LAURA BURKS JAMES, ROI & DEANNA ROUSH, LUCY BROWN, LARRY E. JEFFORDS, RUSSELL M. ROWE, BRIAN BRUSER, III, MR. & MRS. HENRY JOHN, SUE & PHIL ROZELL, JIMMY BURT, HELEN W. JONES, MARY LOU SANDLIN, MIKE CAMPBELL, KATHERINE & CHARLES KAHLE, GAIL SANDLIN, MR. & MRS. WILLIAM CARR, WILLIAM R. KARGES, JOANN SATTERWHITE, BEN CLARY, KAREN KEITH, ELIZABETH & ERIC SCHOENFELD, CARL COCHRAN, JOYCE LANEY, ELEANOR W. SCHULTZE, BETTY DAHLBERG, WALTER G. LAUGHLIN, DR. JAMES E. SCHULZE, PETER & HELEN DALLAS CHAPTER-NPSOT LECHE, BEVERLY SENNHAUSER, KELLY S. DAMEWOOD, LOGAN & ELEANOR LEWIS, PATRICIA SERLING, STEVEN DAMUTH, STEVEN LIGGIO, JOE SHANNON, LEILA HOUSEMAN DAVIS, ELLEN D. -
Selection in Finite Populations with Multiple Alleles
SELECTION IN FINITE POPULATIONS WITH MULTIPLE ALLELES. 111. GENETIC DIVERGENCE WITH CENTRIPETAL SELECTION AND MUTATION B. D. H. LATTER Division of Animal Genetics, C.S.I.R.O., Sydney, N.S.W., Australia Manuscript received April 28, 1971 Revised copy received December 6, 1971 ABSTRACT Natural selection for an intermediate level of gene or enzyme activity has been shown to lead to a high frequency of heterotic polymorphisms in popula- tions subject to mutation and random genetic drift. The model assumes a sym- metrical spectrum of mutational variation, with the majority of variants having only minor effects on the probability of survival. Each mutational event produces a variant which is novel to the population. Allelic effects are assumed to be additive on the scale of enzyme activity, heterosis arising whenever a heterozygote has a mean level of activity closer to optimal than that of other genotypes in the population.-A new measure of genetic divergence between populations is proposed, which is readily interpreted genetically, and increases approximately linearly with time under centripetal selection, drift and muta- tion. The parameter is closely related to the rate of accumulation of muta- tional changes in a cistron over an evolutionary time span.--A survey of published data concerning polymorphic loci in man and Drosophila suggests than an alternative model, based on the superiority of hybrid molecules, is not of general importance. Thirteen loci giving rise to hybrid zones on electrophor- esis have a mean heterozygote frequency of 0 22 rfr .OS, compared with a value of 0.23 i: .04 for 16 loci classified as producing no hybrid enzyme. -
Species Status Assessment Report for the Kentucky Glade Cress (Leavenworthia Exigua Var
Species Status Assessment Report for the Kentucky Glade Cress (Leavenworthia exigua var. laciniata) Version 1.0 Christy Edwards, Missouri Botanical Garden August 2020 U.S. Fish and Wildlife Service Atlanta Regional Office ACKNOWLEDGEMENTS This document was prepared by the U.S. Fish and Wildlife Service’s Kentucky glade cress Species Status Assessment Core Team: Stephanie DeMay (Texas A&M Natural Resources Institute), Jessica Miller (USFWS), Lindsay Dombroskie (Texas A&M Natural Resources Institute), Jonathan Wardell (USFWS) and Drew Becker (USFWS). We would also like to recognize and thank the following individuals who served on the expert team for this SSA and provided substantive information and/or insights, valuable input into the analysis, and/or reviews of a draft of this document: Laura Darnell (Redwing Ecological Services, Inc.), Christy Edwards (Missouri Botanical Garden), Jennifer Koslow (Eastern Kentucky University), and Tara Littlefield (Office of Kentucky Nature Preserves). Further peer review was provided by James Beck (Wichita State University), Todd Crabtree (Tennessee Department of Environment and Conservation Natural Heritage Program), and Alfred Schotz (Auburn University Alabama Natural Heritage Program). We appreciate their input and comments, which resulted in a more robust status assessment and final report. Suggested reference: U.S. Fish and Wildlife Service. 2020. Species status assessment report for the Kentucky Glade Cress (Leavenworthia exigua var. laciniata), Version 1.0. August 2020. Atlanta, GA. SSA Report – Kentucky Glade Cress ii August 2020 VERSION UPDATES SSA Report – Kentucky Glade Cress iii August 2020 EXECUTIVE SUMMARY Leavenworthia exigua var. laciniata (Kentucky glade cress) is a winter annual herbaceous plant in the mustard family (Brassicaceae) known only from Bullitt and Jefferson Counties, Kentucky. -
Evolutionary Genetics of Core Eudicot Inflorescence and Flower Development
® International Journal of Plant Developmental Biology ©2010 Global Science Books Evolutionary Genetics of Core Eudicot Inflorescence and Flower Development Jill C. Preston* Department of Ecology and Evolutionary Biology, University of Kansas, 1200 Sunnyside Avenue, Lawrence, KS 66045, USA Corresponding author : * [email protected] ABSTRACT The genetic basis of flowering is best understood in the model core eudicot species Arabidopsis thaliana (Brassicaceae), and involves the genetic reprogramming of shoot apical meristems, ending in the production of flowers. Although inflorescences and flowers of core eudicots share a common ground plan, variation in architecture, shape and ornamentation suggests repeated modifications to this ancestral plan. Comparative studies, primarily in Brassicaceae and Leguminoseae (rosids), and Asteraceae, Plantaginaceae and Solanaceae (asterids), have revealed a common developmental framework for flowering across core eudicots. This serves as a basis for understanding genetic changes that underlie the diversification of inflorescence and floral form. Recent work is starting to reveal the relative importance of regulatory versus protein coding changes in genes involved in diversification of inflorescence and flower development across core eudicots. Furthermore, these studies highlight the importance of phylogenetic history for understanding functional conservation of duplicated genes. _____________________________________________________________________________________________________________ Keywords: Antirrhinum -
A Behavioral Polymorphism Caused by a Single Gene Inside a Supergene
bioRxiv preprint doi: https://doi.org/10.1101/2020.01.13.897637; this version posted January 16, 2020. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY-NC 4.0 International license. Merritt et al., 13 JAN 2020 – preprint copy – bioRxiv A behavioral polymorphism caused by a single gene inside a supergene Jennifer R. Merritta,1, Kathleen E. Grogana, Wendy M. Zinzow-Kramera, Dan Sunb, Eric A. Ortlundc, Soojin V. Yib, Donna L. Maneya a Department of Psychology, Emory University, Atlanta, GA 30322 b School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA 30332 c Department of Biochemistry, Emory University, Atlanta, GA 30322 1 Correspondence: [email protected] Abstract Behavioral evolution relies on genetic changes, yet few social behaviors can be traced to specific genetic seQuences in vertebrates. Here, we show experimental evidence that differentiation of a single gene has contributed to divergent behavioral phenotypes in the white-throated sparrow, a common North American songbird. In this species, one of two alleles of ESR1, encoding estrogen receptor a (ERa), has been captured inside a differentiating supergene that segregates with an aggressive phenotype, such that ESR1 expression predicts aggression. Here, we show that the aggressive phenotype associated with the supergene is prevented by ESR1 knockdown in a single brain region. Next, we show that in a free-living population, aggression is predicted by allelic imbalance favoring the supergene allele. Cis-regulatory variation between the two alleles affects transcription factor binding sites, DNA methylation, and rates of transcription. -
Ecological and Life History Characteristics Predict Population Genetic Divergence of Two Salmonids in the Same Landscape
Molecular Ecology (2004) 13, 3675–3688 doi: 10.1111/j.1365-294X.2004.02365.x EcologicalBlackwell Publishing, Ltd. and life history characteristics predict population genetic divergence of two salmonids in the same landscape ANDREW R. WHITELEY, PAUL SPRUELL and FRED W. ALLENDORF Division of Biological Sciences, University of Montana, Missoula, MT 59812, USA Abstract Ecological and life history characteristics such as population size, dispersal pattern, and mating system mediate the influence of genetic drift and gene flow on population subdivision. Bull trout (Salvelinus confluentus) and mountain whitefish (Prosopium williamsoni) differ markedly in spawning location, population size and mating system. Based on these differences, we predicted that bull trout would have reduced genetic variation within and greater differ- entiation among populations compared with mountain whitefish. To test this hypothesis, we used microsatellite markers to determine patterns of genetic divergence for each species in the Clark Fork River, Montana, USA. As predicted, bull trout had a much greater propor- tion of genetic variation partitioned among populations than mountain whitefish. Among all sites, FST was seven times greater for bull trout (FST = 0.304 for bull trout, 0.042 for moun- tain whitefish. After removing genetically differentiated high mountain lake sites for each species FST, was 10 times greater for bull trout (FST = 0.176 for bull trout; FST = 0.018 for mountain whitefish). The same characteristics that affect dispersal patterns in these species also lead to predictions about the amount and scale of adaptive divergence among popula- tions. We provide a theoretical framework that incorporates variation in ecological and life history factors, neutral divergence, and adaptive divergence to interpret how neutral and adaptive divergence might be correlates of ecological and life history factors.