Sweet wheat.
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".
Nakamura
Toshiki
T
Tohoku National Agriculture Research Center, Morioka, Japan. tnaka@affrc.go.jp
Shimbata
Tomoya
T
Vrinten
Patricia
P
Saito
Mika
M
Yonemaru
Junichi
J
Seto
Yasuhiro
Y
Yasuda
Hideyo
H
Takahama
Masao
M
D000688:Amylose / Q000378:metabolism*; D009154:Mutation; D010940:Plant Proteins / Q000235:genetics*; D013214:Starch Synthase / Q000235:genetics*; D014908:Triticum / Q000201:enzymology / Q000235:genetics*
D010940:Plant Proteins; D000688:Amylose; C434607:granule-bound starch synthase I; C111377:starch synthase II; D013214:Starch Synthase