Genetic control of amylose content in wheat endosperm starch and differential effects of three Wx genes.

摘要: The endosperm starch of the wheat grain is composed amylose and amylopectin. Genetic manipulation ratio to amylopectin or content could bring about improved texture quality flour. chromosomal locations genes affecting were investigated using a monosomic series Chinese Spring (CS) set Cheyenne (CNN) chromosome substitution lines in CS genetic background. Trials over three seasons revealed that decrease occurred 4A an increase 7B. Allelic variation between CNN was suggested for on chromosomes To examine effects Waxy (Wx) which encode granule-bound synthase (Wx protein), Wx proteins from monosomics interest analyzed SDS-PAGE. amount protein coded by Wx-B1 gene arm 4AL reduced 4A, thus accounted its decreased content. amounts two other Wx-A1 Wx-D1 arms 7AS 7DS, respectively, showed low levels but no effect 7B level presence regulator suppresses activities genes.