Genetic differentiation and reproductive isolation of a naturally occurring floral homeotic mutant within a wild-type population of Capsella bursa-pastoris (Brassicaceae)

DC FieldValueLanguage
dc.contributor.authorHameister, Steffen
dc.contributor.authorNeuffer, Barbara
dc.contributor.authorBleeker, Walter
dc.date.accessioned2021-12-23T16:03:16Z-
dc.date.available2021-12-23T16:03:16Z-
dc.date.issued2009
dc.identifier.issn09621083
dc.identifier.urihttps://osnascholar.ub.uni-osnabrueck.de/handle/unios/5893-
dc.description.abstractApart from the common floral architecture in Brassicaceae, variation in flower morphology occurs in several genera within the family and is considered to affect speciation processes. We analysed genetic differentiation and flowering time variation of two floral variants of Capsella bursa-pastoris, the Spe variant and the wild-type, which occur sympatrically in a vineyard in southwest Germany. The Spe variant is characterized by an additional whorl of stamens instead of petals and was formerly classified as an independent taxon `Capsella apetala' Opiz. Amplified fragment length polymorphism and allozyme analysis revealed a substantial genetic differentiation of the two floral variants and a higher genetic variation within the wild-type subpopulation compared with the Spe subpopulation. The low genetic variation in the mutant provided evidence of a recent local origin or recent introduction. Flowering time analysis indicated that, within the analysed population, the Spe variant flowers significantly later than the wild-type (P < 0.001). We conclude that the evolution and persistence of Spe within a wild-type population is facilitated by high selfing rates and been enhanced by a shift in flowering phenology. Hence, our data provide substantial evidence that the Spe phenotype has established itself as an isolated entity within a wild-type population and may thus serve as a model for the analysis of the evolutionary significance of homeotic mutants in wild populations.
dc.description.sponsorshipDeutsche Forschungsgemeinschaft DFGGerman Research Foundation (DFG) [Ne 314/7-1]; The authors wish to thank C. Niepotter for independent AFLP scoring and U. Coja and R. Grupe for technical assistance. We are grateful to H. Hurka for valuable comments on the manuscript and to Lucille Schmieding for proofreading. Many thanks also to Gunter Thei ss en for discussion in our cooperation project. We also thank Dr Christian Lexer and two anonymous reviewers for helpful comments on an earlier version of the manuscript. Financial support by the Deutsche Forschungsgemeinschaft DFG (Ne 314/7-1 and 2) is greatly acknowledged.
dc.language.isoen
dc.publisherWILEY
dc.relation.ispartofMOLECULAR ECOLOGY
dc.subjectADAPTATION
dc.subjectAFLP
dc.subjectARABIDOPSIS
dc.subjectATTRACTION
dc.subjectBiochemistry & Molecular Biology
dc.subjectCruciferae
dc.subjectDIVERSITY
dc.subjectEcology
dc.subjectEnvironmental Sciences & Ecology
dc.subjectEVOLUTION
dc.subjectEvolutionary Biology
dc.subjectfloral variants
dc.subjectFLOWERING TIME
dc.subjectINDIVIDUALS
dc.subjectMODEL SYSTEM
dc.subjectpopulation structure
dc.subjectSEED BANK
dc.subjectSHEPHERDS PURSE
dc.subjectsympatric differentiation
dc.titleGenetic differentiation and reproductive isolation of a naturally occurring floral homeotic mutant within a wild-type population of Capsella bursa-pastoris (Brassicaceae)
dc.typejournal article
dc.identifier.doi10.1111/j.1365-294X.2009.04216.x
dc.identifier.isiISI:000266716100011
dc.description.volume18
dc.description.issue12
dc.description.startpage2659
dc.description.endpage2667
dc.contributor.researcheridA-7984-2008
dc.identifier.eissn1365294X
dc.publisher.place111 RIVER ST, HOBOKEN 07030-5774, NJ USA
dcterms.isPartOf.abbreviationMol. Ecol.
crisitem.author.deptFB 05 - Biologie/Chemie-
crisitem.author.deptidfb05-
crisitem.author.parentorgUniversität Osnabrück-
crisitem.author.netidNeBa468-
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