Effect of Different Wx Alleles on Amylose Accumulation During Grain Filling in Rice (Oryza sativa L.) Relationship between Polymorphism at Wx Gene and Amylose Content in Hulless Barley Environmental Influences on RVA Properties of Starches From Rice With Different Wx Genotypes Effects of Water Stress on the Texture of Cooked Rice and the Grain Quality of Transgenic Rice Plants Carrying Antisense Wx Gene during Grain Filling