Aneuploids from a Desynaptic Mutant in Soybeans (Glycine max (L.) Merr.)

Abstract

Aneuploids have been identified among progeny from the homozygous recessive desynaptic soybean mutant T258. Most progeny examined from three different years were near the diploid chromosome number. The aneuploids varied in chromosome number, pollen fertility, seed set, and transmission of the extra chromosome. The fertility and transmission rate of the extra chromosome are adequate for use of aneuploids in further cytogenetic studies. Evidence indicates that certain 40-chromosome plants are genomically unbalanced, but viable. Such plants offer opportunities for developing addition-substitution lines.