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MLGsim: a program for detecting clones using a simulation approach
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för molekylärbiologi (Teknisk-naturvetenskaplig fakultet).
2003 (Engelska)Ingår i: Molecular ecology notes, ISSN 1471-8278, Vol. 3, nr 2, s. 329-331Artikel i tidskrift (Refereegranskat) Published
Ort, förlag, år, upplaga, sidor
2003. Vol. 3, nr 2, s. 329-331
Identifikatorer
URN: urn:nbn:se:umu:diva-5678OAI: oai:DiVA.org:umu-5678DiVA, id: diva2:145274
Tillgänglig från: 2007-01-25 Skapad: 2007-01-25 Senast uppdaterad: 2018-06-09Bibliografiskt granskad
Ingår i avhandling
1. Evolution of asexuality in insects: Polyploidy, hybridization and geographical parthenogenesis
Öppna denna publikation i ny flik eller fönster >>Evolution of asexuality in insects: Polyploidy, hybridization and geographical parthenogenesis
2007 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

Asexual reproduction and polyploidy are relatively rare in animals with chromosomal sex determination and always represent a derived condition. To accomplish asexual reproduction several changes in gene expression are required in the mechanism of oogenesis. Polyploidy increases the cell volume and also gives rise to alterations in general physiology. Nevertheless, there are asexual animals that not only survive but seem to be doing better than their sexual progenitors. This is expressed in the distribution pattern called geographical parthenogenesis. Using molecular phylogeny, I here examine the evolution of Otiorynchid weevils, mainly Otiorhynchus scaber and sulcatus in an attempt to trace the evolutionary history and find out what causes the variation in success of different parthenogens. I also evaluate the contribution of asexuality, hybridity and polyploidy as explanations behind geographical parthenogenesis in insects. I conclude that what is called O. scaber is, in fact, a set of geographical polyploids as polyploidy and not asexuality explains the difference in clonal success. I also argue that O. sulcatus is a recently formed clonal species of non-hybrid origin that may well be a good example of a true general purpose genotype. I find little support for asexuality or a hybrid origin as explanations behind geographical parthenogenesis in insects. Finally, I argue that polyploidy in all eukaryotes should be seen as an opportunity for the species evolution, not as a limitation that ensures the demise of the taxa.

Ort, förlag, år, upplaga, sidor
Umeå: Molekylärbiologi (Teknisk-naturvetenskaplig fakultet), 2007. s. 68
Nyckelord
Molecular genetics, weevils, geographical parthenogenesis, hybridization, polyploidy, Genetik, Otiorhynchus
Forskningsämne
genetik
Identifikatorer
urn:nbn:se:umu:diva-980 (URN)978-91-7264-257-7 (ISBN)
Disputation
2007-02-16, Major Groove, 6L, Molekylär Biologi, Umeå Universitet, Umeå, 13:00
Opponent
Handledare
Tillgänglig från: 2007-01-25 Skapad: 2007-01-25 Senast uppdaterad: 2011-03-24Bibliografiskt granskad

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http://dx.doi.org/10.1046/j.1471-8286.2003.00408.x

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Saura, Anssi

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