title: Sweet wheat.
abstract: The major components of storage starch are amylose and amylopectin, and in wheat, both an amylose-free mutant lacking granule-bound starch synthase I and a high-amylose mutant lacking starch synthase IIa have been produced recently. Here, we report the production of an amylose-free/ high-amylose double mutant. This double mutant has kernel and carbohydrate characteristics that are remarkably different than those of either single mutant, including a dramatically shrunken seed shape. Surprisingly, the double mutant has maltose and sucrose levels that are high enough to make it worthy of being called "sweet wheat".
authors.affiliation: Tohoku National Agriculture Research Center, Morioka, Japan. tnaka@affrc.go.jp
authors.forename: Toshiki
authors.initials: T
authors.lastname: Nakamura
authors.forename: Tomoya
authors.initials: T
authors.lastname: Shimbata
authors.forename: Patricia
authors.initials: P
authors.lastname: Vrinten
authors.forename: Mika
authors.initials: M
authors.lastname: Saito
authors.forename: Junichi
authors.initials: J
authors.lastname: Yonemaru
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Seto
authors.forename: Hideyo
authors.initials: H
authors.lastname: Yasuda
authors.forename: Masao
authors.initials: M
authors.lastname: Takahama
mesh_terms: D000688:Amylose / Q000378:metabolism*; D009154:Mutation; D010940:Plant Proteins / Q000235:genetics*; D013214:Starch Synthase / Q000235:genetics*; D014908:Triticum / Q000201:enzymology / Q000235:genetics*
chemical_list: D010940:Plant Proteins; D000688:Amylose; C434607:granule-bound starch synthase I; C111377:starch synthase II; D013214:Starch Synthase