GRAIN POSITION IN SPIKE OF WHEAT (Triticum aestivum L.) AFFECTS GLUTENIN MACROPOLYMER PARTICLES DISTRIBUTION LA POSICIÓN DEL GRANO EN LA ESPIGA DE TRIGO (Triticum aestivum L.) AFECTA LA DISTRIBUCIÓN DE LAS PARTÍCULAS DEL MACROPOLÍMERO DE GLUTENINA

Glutenin macropolymer (GMP), an important component of wheat (Triticum aestivum L.), consists of high weight (HMW-GS) and low-molecular-weight (LMW-GS) gutenin subunits. In wheat, the subunit composition and GMP characteristics are important factors affecting processing quality. The objective of this study was to characterize the effects of soil water status, cultivar and grain position in wheat spike, on GMP particles distribution. Wheat cultivars Jinan 17, Yannong 24 and Lumai 21 with different end-use quality were used in 2009-2011 growing season, and two water regimes (irrigated and rainfed): two irrigations (750 m 3