IV.10 Coordinator's report: Desynaptic genes.
J.F. Scheuring, D.R. Clark and R.T. Ramage, Department of Plant Sciences, University of Arizona, Tucson, Arizona 85721, U.S.A. "R"
Over the past several years, 33 desynaptic mutants have been collected, studied and reported (BGN 1: 38, BGN 2: 65-57, BGN 3: 91, BGN 4: 123-125, BGN 5: 86). All pertinent allele tests among the 33 mutants have now been completed. The 33 mutants occupy 15 loci. The mutants, the variety in which they occurred, and their mode of origin are listed in Table 1. Gene descriptions of the 15 loci have been published (BGN 3: 124-131, BGN 4: 137-142, BGN 5: 113, BGN 6: 116).
Two more desynaptic mutants, des,,ah and des,,ai, have been obtained from hybrid material treated with the chemical mutagen, diethyl sulfate. These desynaptic mutants occurred in lines which were segregating for the translocation T2-7d. Crosses have been made to separate the desynaptic mutants from the translocation. After separation, the mutants will be allele tested and assigned to loci.
Table 1 Desynsptic mutants in barley.
Of the 15 loci, 6 have been assigned to chromosomes: desl, des4 and des5 are located on chromosome 1; des7 is on chromosome 2, des2 is on chromosome 3 and des6 is on chromosome 5. Future work with the desynaptic collection will emphasize the assignment of the other 9 loci to chromosomes.
