Ann Stocker

Ann Stocker, Honorary Research Fellow

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I received my PhD many years ago at the University of Texas Southwestern Medical School with a Drosophila evolutionary geneticist, Costas Kastritsis who had studied inversion polymorphisms with T. Dobzhansky. I then did a post doc at the University of Texas, Austin, studying ecdysone and chromosome activity in Rhynchosciara, particularly in relation to gene amplification. My supervisor was the Brazilian geneticist, Crodowaldo Pavan. After that I came to Melbourne and worked for several years in the Melbourne University Genetics Department at the end of the time of Michael White’s tenure there. I made the mistake of trying to raise Rhynchosciara in Australia since I was very familiar with that fly and I felt that there was a lot of work still to be done. That attempt was not successful. Subsequently, I had a long period at the University of Sao Paulo, Brazil working with Professor Francisco Lara. I have been in and out of Brazil for many years through various political changes and still visit there. During some of that period I was a lecturer for about 8 years at the College of Advanced Education which became the Department of Education of the University of Melbourne. I began to work with Ary when I came back from a long period in Brazil and he was still at La Trobe University. I could have retired but I decided to work a little longer. My first project involved clines in inversion polymorphism. I have been associated with Ary’s group ever since, working casually on various projects and most recently in an honorary position. My speciality is chromosomes, particularly fly chromosomes, which most people do not work with anymore.

Current Project

Chromosome evolution in Australian Scaptodrosophila: I have examined mitotic chromosomes of a number of Australian Scaptodrosophila species and carried out C-banding and Ag-NOR banding. I have also examined polytene chromosomes. Since Ag-NOR banding was only variably successful, I may also do rDNA in situ hybridization when I am in Brazil. I intend to put together my results in a manuscript showing the relationship among the species.

Publications (recent)

  • Stocker AJ, Foley B, Hoffmann AA (2004) Inversion frequencies along a latitudinal cline in Australian populations of Drosophila serrata. Genome Dec; 47(6) 1144-53.
  • Stocker AJ, Madalena CG, Gorab E (2006) The effects of temperature shock on transcription and replication in Rhynchosciara americana (Diptera: Sciaridae). Genetica Mar 126(3) 277-90.
  • Fiorini A, Gouveia FS, Soares MAM, Stocker AJ, Ciferri RR, Fernandez MA (2006) DNA bending in the replication zone of the C3 DNA puff amplicon of Rhynchosciara americana (Diptera: Sciaridae). Mol Biol Rep. Mar 33(1) 71-82.
  • Rako L, Anderson AR, Sgro CM, Stocker AJ, Hoffmann AA (2006) The association between inversion In(3R)Payne and clinally varying traits in Drosophila melanogaster. Genetica Sep-Nov 128(1-3) 373-84.
  • Madalena CG, Amabis JM, Stocker AJ, Gorab E (2006) The localization of ribosomal DNA in Sciaridae (Diptera: Nematocera) reassessed. Chromosome Res (2007) 15(4) 409-16.
  • Gorab E, Amabis JM, Stocker AJ, Drummond L and Stollar BD (2009) Potential sites of triple-helical nucleic acid formation in chromosomes of Rhynchosciara (Diptera: Sciaridae) and Drosophila melanogaster. Chromosome Res. 17(6) 821-32.
  • Stocker AJ, Rusuwa BB, Blacket MJ, Frentiu FD, Sullivan M, Foley BR, Beatson S, Hoffmann AA, Chenoweth SF (2012) Physical and linkage maps for Drosophila serrata, a model species for studies of clinal adaptation and sexual selection. G3 (Bethesda) 2(2) 287-297.
  • Soares MAM, Hartfelder K, Tesserolli de Souza JM, Stocker AJ (2015) Developental ecdysteroid titers and DNA puffs in larvae of two sciarid species, Rhynchosciara americana and R. milleri (Diptera: Sciaridae). Genetica 143(5) 597-612.