However , in more pure strains of M. pumila the M. sieversii ancestry still predominates .
It also found that current populations of M. pumila are more closely related to M. sylvestris than to M. sieversii .
In more pure strains of M. pumila the M. sieversii ancestry still predominates .
It also found that current populations of M. pumila are more closely related to M. sylvestris than to M. sieversii .