In this study,50 wheat varieties promoted since the founding of the People’s Republic of China in Shandong Province were used as materials to analyze the differences in the agronomic traits between main wheat varieti...In this study,50 wheat varieties promoted since the founding of the People’s Republic of China in Shandong Province were used as materials to analyze the differences in the agronomic traits between main wheat varieties promoted in different ages.The results showed that in variety replacement process,the plant height decreased significantly,the 1 000-grain weight increased extremely significantly,and the single-stem economic yield and biological yield decreased first and then increased;the economic coefficient increased significantly,and the ear length,number of grains per ear,total number of spikelets and number of fertile spikelets had no obvious trends in the past few decades;and the changes in single-stem biological yield and economic yield were not consistent with the trend in yield per unit area,indicating that coordinating the relationship between population yield and individual yield is an important direction to improve yield.展开更多
文摘In this study,50 wheat varieties promoted since the founding of the People’s Republic of China in Shandong Province were used as materials to analyze the differences in the agronomic traits between main wheat varieties promoted in different ages.The results showed that in variety replacement process,the plant height decreased significantly,the 1 000-grain weight increased extremely significantly,and the single-stem economic yield and biological yield decreased first and then increased;the economic coefficient increased significantly,and the ear length,number of grains per ear,total number of spikelets and number of fertile spikelets had no obvious trends in the past few decades;and the changes in single-stem biological yield and economic yield were not consistent with the trend in yield per unit area,indicating that coordinating the relationship between population yield and individual yield is an important direction to improve yield.
