[The study of genetic variability of mtDNA in common laboratory inbred strains of mice].

The genetic variation of mtDNA among 7 common laboratory inbred strains of mice was analyzed by PCR-RFLP and PCR-SSCP techniques. D-loop, tRNA(Met + Glu + Ile) and ND3 fragments of mtDNA from the mices showed no variation in 46 endonuclease sites; Deeply analyzed by PCR-SSCP, the D-loop 5' fragment and 3' fragment of mtDNA from these mice also show no genetic variation. Because of maternal mode of inheritance of mtDNA, the results indicate that only one female lineage contributed to the formation of all these common inbred strains of mice.