Roger T. Chetelat
Director, C.M. Rick Tomato Genetics Resource Center
trchetelat@ucdavis.edu

Plant Science

Office
104 Asmundson Hall
(530) 752-6726



 
Degrees:
1994 PhD University of California, Davis Genetics
1983 MS University of California, Davis Plant Physiology
1979 BS Santa Clara University Biology
Research Interests:

My lab studies plant genetics, breeding, and crop diversity, using tomato and its wild relatives as an experimental system. Various breeding and cytogenetic strategies are employed to transfer into cultivated tomato the genomes of related nightshade species. Their genome organization is studied by comparative genetic mapping, and natural diversity and genetic relationships by SSRs and GIS methods. The genes underlying interspecific reproductive barriers (unilateral incompatibility) are being identified by map-based cloning. The role of the DNA mismatch repair system in restricting recombination between diverged species are being studied in transgenic tomatoes. These research projects are integrated with the C.M. Rick Tomato Genetics Resource Center, a genebank of tomato mutants, wild relatives and other genetic stocks.
Department and Center Affiliations:
Department of Plant Sciences
Professional Societies:
American Association for the Advancement of Science
CBS Graduate Group Affiliations:
Genetics  
Graduate Groups not Housed in CBS:
Horticulture and Agronomy  
Publications:
  • Ji, Y., and R.T. Chetelat (2007) GISH analysis of meiotic chromosome pairing in Solanum lycopersicoides introgression lines of cultivated tomato. Genome 50: 825-833.
  • Chetelat, R.T., R.A. Pertuzé, L. Faundez, E.B. Graham, and C.M. Jones (2009) Distribution, ecology and reproductive biology of wild tomatoes and related nightshades from the Atacama Desert region of northern Chile. Euphytica 167: 77-93.
  • Davis, J., D. Yu, W. Evans, T. Gokirmak, R. T. Chetelat, and H. U. Stotz (2009) Mapping of loci from Solanum lycopersicoides conferring resistance or susceptibility to Botrytis cinerea in tomato. Theor. Appl. Genet. 119: 305-314.
  • Jones, C.M., C.M. Rick, D. Adams, J. Jernstedt, and R.T. Chetelat (2007) Genealogy and fine mapping of obscuravenosa, a gene affecting the distribution of chloroplasts in leaf veins, and evidence of selection during breeding of tomatoes (Lycopersicon esculentum; Solanaceae). Amer. J. Bot. 94: 935-947.
  • Albrecht, E., and R.T. Chetelat (2009) Comparative genetic linkage map of Solanum sect. Juglandifolia : evidence of chromosomal rearrangements and overall synteny with the tomatoes and related nightshades. Theor. Appl. Genet. 118: 831-847.
  • Canady, M.A., Y. Ji, and R.T. Chetelat (2006) Homeologous recombination in Solanum lycopersicodes introgression lines of cultivated tomato. Genetics 174: 1775-1778.
  • Rousseaux, C.M., C. M. Jones, D. Adams, R. Chetelat, A. Bennett and A. Powell (2005) QTL analysis of fruit antioxidants in tomato using Lycopersicon pennellii introgression lines. Theor. Appl. Genet. 111: 1396-1408
  • Canady, M.A., V. Meglic, R.T. Chetelat (2005) A library of Solanum lycopersicoides introgression lines in cultivated tomato. Genome 48: 685-697.
  • Ji, Y., R.A. Pertuze, R.T. Chetelat (2004) Genome differentiation by GISH in interspecific and intergeneric hybrids of tomato and related nightshades. Chrom. Res. 12: 107-116.
  • Guimaraes, R.L., R.T. Chetelat, and H.U. Stotz (2004) Resistance to B. cinerea in S. lycopersicoides is dominant in hybrids with tomato, and involves induced hyphal death. Eur. J. Pl. Path. 110: 13-23
  • Pertuze, R. A., Y. Ji, and R.T. Chetelat (2003) Transmission and recombination of homeologous S. sitiens chromosomes in tomato. Theor. Appl. Genet. 107: 1391-1401.
  • Ji, Y., and R.T. Chetelat (2003) Homoeologous pairing and recombination in Solanum lycopersicoides monosomic addition and substitution lines of tomato. Theor. Appl. Genet. 106: 979-989.
  • Pertuze, R.A., Y. Ji, and R.T. Chetelat (2002) Comparative linkage map of the Solanum lycopersicoides and S. sitiens genomes and their differentiation from tomato. Genome 45: 1003-1012.
  • Chetelat RT, and V Meglic. 2000. Molecular mapping of chromosome segments introgressed from Solanum lycopersicoides into cultivated tomato (Lycopersicon esculentum). Theoretical and Applied Genetics. 100:232-241
  • Chetelat RT, V Meglic, P Cisneros. 2000. A genetic map of tomato based on BC1 Lycopersicon esculentum x Solanum lycopersicoides reveals overall synteny but suppressed recombination between these homeologous genomes. Genetics. 154:857-867
  • Stamova BS, RT Chetelat. 2000. Inheritance and genetic mapping of cucumber mosaic virus resistance introgressed from Lycopersicon chilense into tomato. Theoretical and Applied Genetics. 101:527-537
Laboratory Personnel:
151 Asmundson Hall

Sheh May Tam Wentao Li Tim Wills

C.M. Rick Tomato Genetics Resource Center/ Annex 9, Asmundson Hall
http://tgrc.ucdavis.edu
Tim Wills Katie Smith Tom Starbuck

Field Sites:
Vegetable Crops Fieldhouse / greenhouse facilities
Teaching Interests:
Guest lectures in PLB154, AMRR110C, ENH150, VCR220.
GGG291 History of Genetics Co-instructor for ENH150 Plant Conservation Genetics Guest lectures in PLB154, AMRR110C, VCR220. http://www.plantsciences.ucdavis.edu/ggg291/
Courses:
GGG 291 History of Genetics Fall