Restriction Endonuclease Analysis of Mitochondrial DNA from Normal and Texas Cytoplasmic Male-Sterile Maize

Science  09 Jul 1976:
Vol. 193, Issue 4248, pp. 158-160
DOI: 10.1126/science.193.4248.158


Mitochondrial DNA from normal and cytoplasmic male-sterile maize was digested with restriction endonucleases RI from Escherichia coli or dIII from Hemophilus influenzae. Electrophoresis of resulting fragments revealed distinctions between the two cytoplasmic types. These distinctions suggest that factors responsible or cytoplasmic male sterility are located in the mitochondrial DNA, and that the mitochondrial genome is not inherited paternally.