| mitochondrial control region polymorphism reveal high amount of gene flow in fennoscandian willow tits (parus montanus borealis). | we studied the genetic variability and differentiation of two fennoscandian willow tit (parus montanus borealis) populations located ca. 1000 km apart in finland and sweden by using the control region sequences of the mitochondrial dna. individual variation in the control region was extensive since all the 13 finnish and the 12 swedish individuals had unique haplotypes and the mean pairwise genetic distance resulted in 0.0052 (range 0.0008-0.0109). in the minimum spanning network connecting the ... | 1998 | 9652233 |