| The composition of high\|molecular\|weight glutenin subunits in Gansu winter wheats and analysis of their quality status |
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| DOI：10.7606/j.issn.1000-7601.2020.01.37 |
| Key Words: winter wheat HMW-GS quality Gansu Province |
| Author Name | Affiliation | | ZHENG Qi | Pingliang Academy of Agricultural Sciences,Pingliang, Gansu 744000,China | | LI Xin | Institute of Genetics and Developmental Biology,Chinese Academy of Sciences, Beijing 100101, China | | REN Genshen | Pingliang Academy of Agricultural Sciences,Pingliang, Gansu 744000,China | | LI Xingmao | Dryland Agriculture Institute, Gansu Academy of Agriculture Science, Lanzhou, Gansu 730070, China | | ZHANG Aimin | Institute of Genetics and Developmental Biology,Chinese Academy of Sciences, Beijing 100101, China |
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| Abstract: |
| High\|molecular\|weight glutenin subunits (HMW-GS)is closely related to the processing quality of wheat flour. In this study, HMW-GS compositions of 72 varieties (lines) in Gansu were investigated and the quality of them was also evaluated. The results showed that these wheat varieties (lines) had three types of HMW-GS at the Glu-A1 locus, namely, Null, 1, and 2*. There were five types of HMW-GS at the Glu-B1 locus: 7+8, 7+9, 6+8, 13+16,and 20x+20y. At the Glu-D1 locus, three types of HMW-GS existed. They were Null, 2+12 and 5+10. The frequency of HMW-GS 1, 2*, 13+16, and 5+10 was 70.83%, 2.78%, 1.39% and 33.33%, respectively. In recent years, the improvement of Null and 7+9 subunits composition at Glu-A1 and Glu-B1 loci in Gansu winter wheat breeding is remarkable. The frequency of good processing quality subunits of 1 and 7+8 were obviously increased. The combination of 1/7+8/2+12 was the major type in new wheat varieties (lines), which accounted for 44.90%. The percentage of new varieties (lines) with high quality subunit combination of 1/7+8/5+10 was low, accounting for only 12.24%. Therefore, introducing good quality subunits, such as 14+15 and 13+16 at Glu-B1 locus and 5+10 at Glu-D1 locus into Gansu winter varieties was highly desirable. It is also important for bread quality improvement and release of new wheat varieties in wheat production areasin east of Gansu. |
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