Since 1976, the author has been crossbreeding various cultivarieties of varied morning glory and large-flowered morning glory in large quantities with descendants of the African strain of the morning glory, Ipomoea nil x Ipomoea purpurea as an interbridge. Especially the white part of the corolla margin began to extend along the midpetaline band (You) to the inner direction and arrived at the flower tube finally by repeated additions of the marginal white characteristics. This is the birth of a strain called "Haneguruma" ("Impeller"). The flower of this hybrid morning glory came to give the impression of brightness due to this due to this extended white band. The author named this new character Youjiro (Ray white) in 1979. The author then crossed the hybrid plant with Japanese morning glories repeatedly, resulting in a high level of breeding to what I now call Youjiro (Ray white) morning glory. Besides, new flower forms and designs such as quail spots, the ray flow, and the feathering double were produced.

Slide 186-205 : 206-213
Suzumehu flecked	Uzurahu quail	Uzurahu quail	Uzurahu quail
Youziro Ray white	Youziro Ray white	Akayouziro Ray white	Pinkuyouziro Ray white
Noukonyouziro Ray white	Akayouziriodairin Ray white	Akayouziriodairin Ray white	Younamisibori ray flow
Younamisibori ray flow	Younamisibori ray flow	Younamisibori ray flow	Younamisibori ray flow
Younamisibori ray flow	Younamisibori ray flow	Younamisibori ray flow	Younamisibori ray flow

References

1. Yoneda, Y. (1978) Cultivation and crossing of the morning glory. Iden (Heredity) 32: 46-52.
   
2. Yoneda, Y. and Takenaka, Y. (1981) Natural-color illustrated monograph of Japanese morning glory. Hokuryukan, Tokyo.
   
3. Yoneda, Y. (1981) Morning glories Sin Kaki (New flowers) 111: 14-19.
   
4. Yoneda, Y. (1983) Interspecific hybrid character of the morning glory and its introduction to the large-flowered morning glory. Tokyo Asagao Kenkyuukai Kaihou (Bulletin of Tokyo Study Club of the Morning Glory) 31: 32-43.
   
5. Yoneda, Y. (1985) Illustrated book of the morning glory. Floral calendar series (5) The Rose of Sharon (Hibiscus syriacus), Morning glory, Lily 64-76 Sekai Bunkasha.
   
6. Yoneda, Y. (1985) History and culture of the morning glory. Saisyuu to Siiku ( Collection and Breeding) 47 (7): 284-288.
   
7. Yoneda, Y. (1986) New announcement; Youjiro (Ray white) morning glory, its origin and characteristic Engei Tusin (Gardening communication) 36 (4): 34.
   
8. Yoneda, Y. (1991) Flower color inheritance of the morning glory and breeding of Youjiro (Ray white) morning glory Baio Horutji (Bio Horti) 7: 68-74.