Genome-addition (GA), genome-substitution (GS) forms of hexaploid wheat and donors of their subgenomes were used for investigation of genetic control of grain protein contents (GPC). Studies on GPC in three GA forms with the same genome AABB and subgenomes DD derived from three common wheat varieties indicated three type of interaction between genome AABB and subgenome DD. It was revealed that in genetic control of GPC of these forms took part two unlinked genes with duplicate type of interaction. Itwas shown different influence on GPC of six accessions of Aegilops tauschii Coss. Amphiploid Triticum miguschovae Zhirov (A'A'GGDD) and GS form Avrodes (AABBSS) which have high GPC were found to be a valuable source for common wheat improvement in thistrait.
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