Abstract:

The experiment was conducted using 175 recombinant inbred lines （RILs） derived from a cross between common wheat Jing 771 and Pm97034. The results indicated that the GMP content in most RILs was accumulated at low level in early stage of grain filling, then ascended gradually, but descended at about 22 days after anthesis, then ascended continually up to maturity, which was the same as that in their parents. The effects of different subunit combinations on the dynamic changes of GMP content were different. The GMP content in the RILs with（1,17+18,5+10）, (N,17+18,5+10),（1,14+15,5+10）,（N,14+15,5+10） subunit combinations were quickly accumulated from 27 days to 32 days after anthesis, and up to the highest value at maturity. The four subunits combinations especially the 5+10 subunits were favorable to GMP accumulation. The results of conditional genetic variance components showed that the GMP quantitative genes were expressed from filling to mature, and most active at 17 days after anthesis, while inactive at about 22 days after flowering. The dynamic changes of the GMP net genetic variation were similar to that of GMP content accumulation.

Key words: Common wheat, GMP content, Net genetic variation