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CROSSOVER SUPPRESSORS AND BALANCED RECESSIVE LETHALS IN CAENORHABDITIS ELEGANS
Robert K. Herman 1
1 Department of Genetics and Cell Biology, University of Minnesota,
St. Paul, Minnesota 55108
Two dominant suppressors of crossing over have been identified following X-ray treatment of the small nematode C. elegans. They suppress crossing over in linkage group II (LGII) about 100-fold and 50-fold and are both tightly linked to LGII markers. One, called C1, segregates independently of all other linkage groups and is homozygous fertile. The other is a translocation involving LGII and X. The translocation also suppresses crossing over along the right half of X and is homozygous lethal. C1 has been used as a balancer of LGII recessive lethal and sterile mutations induced by EMS. The frequencies of occurrence of lethals and steriles were approximately equal. Fourteen mutations were assigned to complementation groups and mapped. They tended to map in the same region where LGII visibles are clustered.
Submitted on July 19, 1977Revised on September 22, 1977
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