Composition of HMW-GS of new wheat cultivars in Huanghuai wheat production area

In order to understand the composition situation and distribution characteristic of high molecular weight glutenin subunit(HMW-GS),the subunit composition,frequency of subunit and quality scores in 39 wheat varieties were studied.The results showed that there were 11 glutenin subunits and 16 types of subunit combination.The frequencies of high quality subunits 2*,14+15 and 5+10 were 2.6%,7.7% and 17.9%,respectively.Of the types of subunit combination 1,7+8,2+12 and N,7+8,2+12 were the main types and their frequencies were 20.5% and 15.4%,respectively.The quality score in the 39 wheat varieties was ranged from 5 to 10,average 7.5.There were no subunit combination of 1/2*,14+15,5+10 and 1/2*,13+16,5+10,but a new combination appeared,such as 1,13+16,3+12.This indicated that the inheritance variance occurred in HMW-GS of these materials.Therefore,in the quality breeding of wheat,polymerizing high quality subunits should be paid more attention to.It is important for quality improvement in the wheat breeding.