Irwin = Iwen, sometimes spelled Aiwen.
Yuwen is not Iwen / Aiwen. I did some looking into all this a few months ago. as squam said, its a cross between Irwin and another Chinese variety called Chinghuang.
And i think its possible that Chinghuang is the same as Jin Hwang, or sometimes as Gin huang. aka as the Golden Queen.
if this is all true, the Yuwen is a hybrid of Irwin and Golden Queen.
Another hybrid has been developed, where Yuwen have taken its color traits from Irwin, this other variety seems to have taken its appearance from the Golden Queen ( Jin Huang ). called Summer Snow.
Apparently they look like mice:
Haha, ok, this is the only picture I could find of the Summer Snow mango, look at the skin, yellow with red specks, looks very attractive. and could this be a winter mango?
Taiwan Develops New Mango Variety
Agricultural experts in southern Taiwan have developed a new mango variety and are trying to encourage fruit farmers to engage in large-scale cultivation of the fruit.
Huang Hsien-liang, head of the Kaohsiung District Agricultural Research and Extension Station, disclosed that the new mango variety, formally named Summer Snow, has some of the characteristics of the three most popular mango varieties in Taiwan: the indigenous mango, the Irwin mango and the Chin Hwang mango.
According to Huang, the Summer Snow mango, which weighs about 400 to 550 grams, smells like the Irwin mango but tastes like the indigenous mango, while its skin looks like the Chin Hwang mango. Its flesh, however, does not have the coarse fiber of the indigenous mango.
Experimentation on the new variety began in 2000, with the process of cultivation, comparison and screening spanning seven years before researchers confirmed their success in 2007.
The Summer Snow flowers between late December and early February, with its fruits maturing between May and July. The mango's flesh accounts for 75 percent to 80 percent of its weight. Huang said the new mango variety has the potential to become one of the most popular fruit exports from Taiwan.
At present, Taiwan has about 18,000 hectares of farmland dedicated to the plantation of mangoes, with 7,500 hectares for Irwin mangoes and 2,400 hectares for Chin Hwang mangoes.
Red-skinned Irwin mangoes, weighing about 400 grams each, are a favored fruit not only in Taiwan, but also among consumers in Japan, South Korea, Singapore and Hong Kong.
