On November 9th, the Aomori Industrial Technology Center (Apple Research Institute), which was asked to investigate the red apple trees growing yellow apples on the Aomori farm, examined the fruit and the orchard.

The Twitter account "Yukito Manager" asked the apple research institute to investigate. According to Mr. Yukito, the manager of the apple farm, which was owned by his grandfather and now managed by his uncle, there was a yellow apple growing on the trunk of a red apple tree called "Fuji". When I posted on Twitter on November 1, "Unidentified apple", there were reactions such as "Golden apple?"

On November 9, a person in charge of the Apple Research Institute's Variety Development Department examined the fruit and the trees in the orchard. According to the person in charge, the resulting yellow apples have a sweet aroma, and judging from their appearance and harvest time, they are likely to be of the cultivar 'Kinboshi', but there are no visible signs of grafting between the 'Fuji' branches. Therefore, it is said that the possibility of mutated "branch change" is not zero.

Manager Yukito said, "I don't remember my grandfather clearly, so I can't ask for details, but I've never planted 'Kensei' in this orchard. Yellow apples have been growing in the same place for three years. I said.

Apples are grown by grafting scions of different varieties onto rootstocks. When growing a different variety, either the "seedling renewal" method, in which the grafted seedlings are replanted, or the "high-grafting renewal" method, in which branches of another variety are grafted onto the trunk and branches of the original variety, are taken. “I heard that the tree that produced the yellow apples was 'Fuji' planted about 10 years ago. If the tree is grafted onto a young branch, the graft marks will become less noticeable as the years go by, so it is possible that the 'Kensei' sapling was mixed in. There is a possibility that it was replaced with 'Fuji' midway through and renewed," said the person in charge.

Yukito, the manager who actually ate the yellow apple, said, "It tasted like Fuji, but it also felt like a different apple." The yellow apple called "Golden Fuji" is distributed as a branch change of "Fuji". “In the case of branch changes, it is necessary to confirm that the nature of the fruit does not change even after repeated grafting. Good," said the person in charge.

Yukito, the manager, said with a smile, "I talked with my uncle, who is the owner of the garden, and decided to keep the branch with the yellow apples. I would be happy if it was recognized as a new variety in the future."