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JÜRGEN GADAU Associate Professor Ph.D., 1997, University of Würzburg Send e-mail to jgadau@asu.edu

Dr. Gadau's research interests focuses on the causes and consequences of genetic variability in solitaire and social Hymenoptera. In particular, he wants to understand the evolutionary processes leading to speciation and adaptation and what are the essential genetic changes involved in these processes.

Dr. Gadau also has a long standing interest in the study of the evolution of social insect societies with a focus on ants. He is especially interested in the evolution of polyandry and polygyny.

Current projects in Dr. Gadau’s group are:

1. Mechanisms and genetic architecture of speciation in Nasonia spp. (parasitic wasp) and Pogonomyrmex spp. (harvester ants)
2. Coevolution of ants and plants (Crematogaster/Macaranga) and ants and bacteria (Camponotus/Blochmania).
3. Genetic architecture of adaptive traits like interspecific differences in courtship behavior, wing size and/or pheromones) using the Nasonia-hybrid system or disease resistance in the genus Bombus (bumble bees) and A. mellifera.
4. The proximate mechanisms leading to nuclear-nuclear and nuclear-cytoplasmic incompatibilities and phenotypic aberrations in hybrids.
5. Understanding the evolution of multilevel systems like insect colonies using theoretical approaches:
   
   Social insect colonies are one of the best systems to experimentally study questions regarding the evolution of complex systems because the have evolved multiple times independently and come in different sizes. The recent explosion of research on complex systems in general has produced a variety of new theoretical, mathematical and computational tools and models which could be tested using social insect colonies.

Selected Publications

Heinze J, Gadau J, Hölldobler B, Nanda I, Schmidt M, Scheller K (1994) Genetic variability in the ant Camponotus floridanus detected by multilocus DNA fingerprinting. Naturwissenschaften 81:34-36

Gadau J, Heinze J, Hölldobler B, Schmid M (1996) Population and colony structure of the carpenter ant, Camponotus floridanus. Mol Ecol 5:785-792

Gadau J, Gertsch PJ; Heinze J, Pamilo P, Hölldobler B (1998). Oligogyny by unrelated queens in the carpenter ant, Camponotus ligniperdus, Behav Ecol Sociobiol 44: 15-22.

Gadau J, Page REJr, Werren JH (1999). Mapping of hybrid incompatibility loci in Nasonia, Genetics 153:1731-1741.

Gadau J, Brady SG, Ward PS (1999). Systematics, distribution, and ecology of an endemic California Camponotus quercicola (Hymenoptera: Formicidae), Ann. Entomol. Soc. Am. 92: 514-522.

Gadau J, Page REJr, Werren JH, Schmid-Hempel P (2000) Genome organization and social evolution in Hymenoptera. Naturwissenschaften, 87:87-89.

Sauer C, Stackebrandt E, Gadau J, Hölldobler B, Gross R (2000). Systematic relationships and cospecioation of bacterial endosymbionts and their carpenter ant host species. IJSEM, 50:1877-1886.

Brady SG, Gadau J, Ward PS (2000). Systematics of the ant genus Camponotus (Hymenoptera: Formicidae): A preliminary analysis using data from the mitochondrial gene cytochrome oxidase I. pp. 131-139. in Hymenoptera: Evolution, Biodiversity and Biological Control eds.: A. Austin and M. Dowton, CSIRO Publishing, Canberra. 468 pp.

Gadau J, Gerloff CU, Krüger N, Chan H, Schmid-Hempel P, Wille A, Page REJr. (2001). A linkage analysis of sex determination in Bombus terrestris (L.) (Hymenoptera: Apidea) J. Heredity 87:234-242.

Page REJr., Gadau J, Beye M (2002). The emergence of hymenopteran genetics. Genetics, 160:375-379.

Gadau J, Page REJr., Werren JH (2002). The genetic basis of the interspecific differences in wing size in Nasonia (Hymenoptea; Pteromalidae) - major QTL and epistasis. Genetics, 161: 673-684.

Julian GE, Fewell JH, Gadau J, Johnson RA, Larrabee D (2002). Genetic determination of the queen caste in an ant hybrid zone. PNAS 99: 8175-8160.

Kronauer DJC, Gadau J (2002) Isolation of polymorphic microsatellite markers in the new world honey ant Myrmecocystus mimicus. Mol. Ecol. Notes. 2:540-541.

Kronauer DJC, Gadau J, Hölldobler B (2002) Genetic evidence for intra- and interspecific slavery in honey ants (Genus Myrmecocystus). Proc. R. Soc. Lond. B. 270: 805-810.

Berghoff SM, Gadau J, Winter T, Linsenmaier KE, Maschwitz (2003) Investigation on the Sociobiology of a hypogaic army ant: description of a sympatric Dorylus species and interspecific colony conflicts. Insectes Soc. 50:139-147.

Feldhaar H, Fiala B, Gadau J, Mohamed M, Maschwitz U (2003) Molecular phylogeny of Crematogaster subgenus Decacrema ants (Hymenoptera: Formicidae) and the colonization of Macaranga (Euphorbiaceae) trees. Mol. Phylogenet. Evol., 27: 441-452.

Gadau J, Strehl CP, Oettler J, Hölldolber B (2003) Determinants of intracolonial relatedness in Pogonomyrmex rugosus (Hymenoptera; Formicidae) - mating frequency and brood raids. Mol. Ecol., 12: 1931-1938

Rosario Gil, Francisco J. Silva, Evelyn Zientz, François Delmotte, Fernando González-Candelas, Amparo Latorre, Carolina Rausell, Judith Kamerbeek, Jürgen Gadau, Bert Hölldobler, Roeland C. H. J. Van Ham, Roy Gross, and Andrés Moya (2003) The genome sequence of Blochmannia floridanus: comparative analysis of reduced genomes. PNAS, 100(16):9388-93.

Pietsch C, Rütten KB, Gadau J (2004) Eleven microsatellite markers in Nasonia, Ahmead 1904 (Hymenoptera; Pteromalidae. Mol Ecol Notes, 4 43-45.

Rutten KB, Pietsch C, Olek K, Neusser M, Beukeboom LW, Gadau J. (2004) Chromosomal anchoring of linkage groups and identification of wing size QTL using markers and FISH probes derived from microdissected chromosomes in Nasonia (Pteromalidae:Hymenoptera). Cytogenet Genome Res., 105(1):126-33.

Kronauer DJC, Hölldobler B, Gadau J (2004) Phylogentics of the New World honey ants (genus Myrmecocystus) estimated from mitochondrial DNA sequences. Molecular Phylogenetics and Evolution, 32(1):416-21.

Feldhaar H, Fiala B, Gadau J (in press) Characterization of microsatellite markers for plant-ants of the genus Crematogaster subgenus Decacrema. Molecular Ecology Notes

Rheindt F, Gadau J, Strehl CP, Hölldobler B (in press) Extremely high mating frequency in the Florida harvester ant (Pogonomyrmex badius).

Bickel T, Gadau J, Brühl CA, Hölldobler B, Linsenmair KE (in press) Reduction of genetic variability in leaf litter ant populations due to habitat fragmentation and isolation of tropical rainforests in Sabah, Borneo.

Rheindt F, Gadau J (in press) A genetic component in the determination of worker polymorphism in the Florida harvester ant Pogonomyrmex badius. Insectes Sociaux

Kaltenpoth M, Strohm E, Gadau J. (in press) Development of polymorphic microsatellite markers for the European beewolf - Philantus triangulum (Hymenoptera, Sphecidae). Mol. ecol.

Strehl C, Gadau J (in press) Cladistic analysis of island populations of the Florida harvester ant (Hymenoptera: Formicicdae) using divergence of mitochondrial DNA sequences.

Miscellaneous:

Habilitationsschrift (University of Würzburg)

"Ursachen und Folgen genetischer Variabilität bei sozialen und solitären Hymenopteren" (2003)

Proposal to Sequence the Nasonia Genome (2004)

Contributing authors: J.H. Werren, J. Gadau, L. Beukeboom, C. Desplan, J. Lynch, R. Rivers, S.

Richards, L. van de Zande.