Journal of Northern Agriculture ›› 2021, Vol. 49 ›› Issue (6): 35-44.doi: 10.12190/j.issn.2096-1197.2021.06.04

• Crop genetic breeding·Germplasm resources • Previous Articles     Next Articles

Analysis of grain quality for approved grain maize varieties in Inner Mongolia

HOU Xuguang1, ZHANG Jing1, SHI Haibo1, ZHAO Ruixia1, WANG Fengying2, MU Zongjie1, YU Weizhuo1   

  1. 1. Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences,Hohhot 010031,China;
    2. Inner Mongolia Guodong Academy of Agricultural Sciences,Hohhot 010011,China
  • Received:2021-12-02 Online:2021-12-20 Published:2022-02-09

Abstract: 【Objective】 To better understand the changing trend of grain quality for grain maize varieties,and clarify the direction of maize quality breeding.【Methods】The quality changing trend and distribution of 1 115 grain maize varieties from 2002 to 2021 were studied using information from 1 352 maize varieties approved in Inner Mongolia between 1980 and 2021. The correlation analysis was used to examine the quality features of 973 varieties with complete information.【Results】416 out of 1 115 grain maize varieties met the requirements for high-quality or special-purpose maize varieties,accounting for 37.31%. The proportion of high starch maize varieties rose year after year,peaking at 74.44% in 2021. The bulk density and crude starch content of grain maize varieties increased significantly or extremely significantly(P<0.05 or P<0.01)over time,with an average annual increase of 0.733 g/L and 0.176 percentage points,respectively. While crude protein,crude fat,and lysine content decreased extremely significantly by 0.040,0.029,and 0.002 percentage points,respectively(P<0.01). High starch maize varieties accounted for 35.09% of total grain maize varieties,and showed a rapid increase trend year by year. The year of approve or quality determination,as well as the ecological area had a significant impact on the bulk density and quality traits. There was no link between the increase of bulk density and the enhancing of grain quality traits.【Conclusion】The carbon dilution impact was linked to an increase in crude starch content and a decrease in crude protein,crude fat,and lysine content. The environment had a significant impact on the quality traits and their relationships. To gradually improve the commercial quality of maize varieties in China,enhancing yield,disease resistance,lodging resistance,increasing bulk density,and reducing grain moisture content should be considered as breeding objectives and essential indicators for variety approval.

Key words: Grain maize, Approved varieties, Quality, Correlation analysis

CLC Number: 

  • S513