Brian, I don't know much about the breeding either. But I think what they are saying is there were three different origin of the sumo. One was submitted from China (who said it was a sumo from Japan, could have been a seedling ?), and other one was from Brazil (don't know how they got it, or where), the last one is the true variety that you buy from the market, it came from Japan but not commercially available to buy any budwood from CCPP. Sunkist/Suntreat owns the patent rights and will not just let anyone grow it. They select growers here in CA to plant/produce the sumo for market.
If you live in FL, you can buy a Shiranui Mandarin Tree at $49.99 now. The fruits on the pic looks those sold in store.
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The Shiranui is a Japanese mandarin hybrid between a Ponkan tangerine and a Kiyomi tangor. Its fruit is large, very sweet and produces no seeds making it a highly desirable fresh fruit variety.
Although officially known as Shiranui in Japan, this mandarin variety has been trademarked as both ‘Dekopon’ and ‘Sumo’. In Korea it is called ‘Hallabong’ and in Brazil it is called ‘Kinsei’. No matter what you call it, the Shiranui can be recognized by its large protruding bump on the top of the fruit, which is ripe in early spring to early summer.
Parentage: Ponkan tangerine x Kiyomi tangor
Harvest season: Feb-May
Growing zones: 9-11
Pollinator needed: No
Seeds per fruit: Seedless
Mature height - Full Size: 12-15 ft.
Mature height - Dwarf: 8-10 ft.
Size when shipped: 26-30”
We ship all orders the same business day if placed before 12:00pm EST. We ship trees Mon-Thu so that they arrive prior to the weekend. Your trees may ship the following week to avoid being in transit over the weekend.
Each of our trees is hand-grafted and raised with care at our nursery in Central Florida. We guarantee that you will receive a high quality, healthy citrus tree free of pest or disease - or your money back.