Comparative macromolecular analysis of the cytoplasms of normal and cytoplasmic male sterile Brassica napus

Chloroplast (cp) and mitochondrial (mt) compartments of normal (N) and cytoplasmic male sterile (cms) lines of Brassica napus have been characterized and compared on the basis of cp and mt DNA restriction enzyme analysis and in vitro protein synthesis by isolated mitochondria. Cytoplasmic male sterility of B. napus (rape) comes from cms Raphanus sativus (radish) through intergeneric crosses.