RFLP of profiles of mitochondrial and chloroplast DNA of S. mussotii, B. scorzonerifolium , and the hybrid cell lines from combinations B and C between S. mussotii and B. scorzonerifolium. M, labeled λDNA digested by HindIII+EcoRI; Bs, B. scorzonerifolium; Sm, S. mussotii; B9, B24, C10 and C64, hybrid cell lines of S. mussotii -B. scorzonerifolium. Arrows indicate bands of the S. mussotii and B. scorzonerifolium; arrowheads indicate new bands. A, HindIII-digested genomic DNA probed with the mitochondrial-specific probes coxI. B, HindIII-digested genomic DNA probed with the chloroplast-specific probe rbcL.