ZHANG Xiaoqing
National Agricultural Technical Extension and Service Center, Beijing 100125XU Naiyin
Institute of Industrial Crops, Jiangsu Academy of Agricultural Sciences, Nanjing 210014SUN Jing
Shanxi Province Seed Industry Development Center, Taiyuan 030006LIU Sujuan
Hebei Seed Station, Shijiazhuang 050031LIANG Chen
Tianjin Agricultural Development Service Center,Tianjin 300000LIU Linbin
Hebei Seed Station, Shijiazhuang 050031XU Jianwen
Institute of Industrial Crops, Jiangsu Academy of Agricultural Sciences, Nanjing 210014XU Xu
Institute of Industrial Crops, Jiangsu Academy of Agricultural Sciences, Nanjing 2100141.National Agricultural Technical Extension and Service Center, Beijing 100125;2.Institute of Industrial Crops, Jiangsu Academy of Agricultural Sciences, Nanjing 210014;3.Shanxi Province Seed Industry Development Center, Taiyuan 030006;4.Hebei Seed Station, Shijiazhuang 050031;5.Tianjin Agricultural Development Service Center,Tianjin 300000
Foundation project: National Scientific and Technological Innovation Major Projects (2022ZD04019)
The northern winter wheat region (NWWR) is one of the main wheat producing areas in China. A retrospective analysis of the nationally approved wheat varieties will facilitate rational utilization of wheat varieties in the region. Genotype by yield×trait (GYT) biplot analysis was used to cluster and evaluate 47 wheat varieties that were nationally approved for NWWR during 2003-2023, based on the combinations of grain yield with other target traits including maturity date, spike number per hectare, grain number per spike, 1000-kernels weight, test weight, quality index, disease resistance index, and cold resistance index. The results showed that these wheat varieties could be classified into four distinct variety types. Type I includes eight varieties, i.e. Jingmai 179, Jingnong 16, Jinmai 3118, et al, characterized by outstanding performance in the combination of earliness, disease resistance, cold resistance, 1000-kernels weight and test weight, and good performance in the combination of yield and spike number, grain number per spike and a quality index, and which showed the highest value in production. Type II varieties comprised of 13 varieties, including Jingmai 202, Jingnong 19, Lunxuan 158, et al, characterized by superior combination of yield with a quality index and spike number, but slightly poor combinaiton between yield and disease resistance and cold tolerance. These varieties are valuable in wheat production in the region as soon as diseases and winterkill are under control. Type III varieties had the best combination of yield with disease resistance and cold resistance index, but were poor in combination between yield and other traits. Therefore, their value in production is limited, but could be used as disease-resistant parents in wheat breeding. Type IV varieties were poor in overall yield×trait combination; but some may be outstanding in a single and can be used as breeding parents. Based on the projection position of each variety on the average yield×trait axis (ATA) of the GYT biplot, Jingmai 179, Jingnong 16, Jinmai 3118, Jingmai 189, Jingmai 202, Jinghua 12, Jingnong 19, Lunxuan 158 and Zhongmai 623 were identified to have superior overall yield×trait combination. This study provided reference for the use of GYT biplot for comprehensive wheat cultivar evaluation and classification based on yield×trait combinations for the NWWR, which can be applied to other crops and regions.