The TGRC collection includes more than 1,000 monogenic mutants at over 600 loci, including spontaneous and induced mutations affecting many aspects of plant development and morphology, disease resistance genes, protein marker stocks, and other traits of economic importance (Chetelat 2005). Genetic data on individual stocks, including phenotypes, images, chromosome locations, etc. are available at the TGRC website. An additional series of provisional (i.e., less well characterized) mutants are also available. The Hebrew University of Jerusalem offers an isogenic mutant library in the genetic background of cv. M82 (http://zamir.sgn.cornell.edu/ mutants/index.html). A total of 13,000 M2 families, generated by ethylmethane sulfonate (EMS) and fast-neutron mutagenesis, were phenotypic-ally analyzed and catalogued into at least 3,417 mutations (Menda et al. 2004). This series of mutations includes many previously described mutant phenotypes as well as many novel mutants, and multiple alleles per locus. Together these mutant collections provide important tools for analyses of gene function.
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