 However another recent DNA analysis confirms that "M. sylvestris" has contributed significantly to the genome.The study found that secondary introgression from other species of the genus "Malus" has greatly shaped the genome of "M. domestica", with "M. sylvestris" being the largest secondary contributor.It also found that current populations of "M. domestica" are more closely related to "M. sylvestris" than to "M. sieversii".