WILLIAM F. ERIDAN partment of Biology, University of North Dakota, Grand Forks, N . D. 58202 Manuscript received July 9, 1979 Reved copy received April 21,1980 ABSTRACT A planting of 3,919 MI s from normal ears crossed by EMS-treated pollen produced 3,461 MI plants and 3,172 selfed ears. These plants yield 2,477 (72%) total heritable changes; the selfed ears yield 2,457 (78%) recessive mutants, including 855 (27%) recessive mutants and 8 (0.23%) viable dominant mutants. The ratio of recessive to dominant mutants was 201:l. The average mutation frequency for four known loci was three per 3,172 genomes analyzed. The estimated total number of loci mutated was 535 and the estimated number of mutant loci mutated was 285. Among the 855 mutants, 432 had a nonviable embryo, and 59 germinated but had a lhal seedling. A sample of 194 of the latter two types was tested for heritability, lhality, chromosome and endosperm-embryo interaction bween mutant and nonmutant tsues in special hyper-hypoploid combinations produced by manipulation of B-A translocations. The selected 194 mutants were characterized and catalogued according to endosperm phenotype and investigated to termine their effects on the morphology and velopment of the associated embryo. The possibility of rescuing
Genetics – Genetics Society of America
Published: Aug 1, 1980
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