Additionally, Someiyoshino has the form of crossbreeding of the Oshima cherry and Edohigan as well as certain genetic similarities to the Oshima cherry and Edohigan, and since the Oshima cherry is an island form of Kasumizakura (Prunus Leveilleana Koene) that evolved in the Izu Island chain and doesn't exist in the Korean Peninsula, the theory was disadvantageous from this perspective too.
また、ソメイヨシノはオオシマザクラとエドヒガンの交配的形態を持ち、遺伝子の特性もオオシマザクラとエドヒガンの特性に似るが、オオシマザクラは伊豆諸島で進化したカスミザクラの島嶼型であって朝鮮半島には存在しておらずこの点からも不利であった。