基于GT双标图对小麦新品系的分类评价OA北大核心CSTPCD

In order to comprehensively and accurately evaluate the new wheat lines in drought-rich land experiment,26 wheat lines participating in the National Dryland Group multi-point comparative experiment from 2020 to 2021 were selected as the materials.Multivariate statistical methods were used to analyze the changes of yield and quality traits under field conditions during the 2 years.The results showed that the 2-year variation coefficients of yield and quality traits of 26 new lines were 2.0%～74.2%and 2.1%～95.1%,respectively.The variation coefficients from high to low were stable time＞wet gluten content＞protein content＞water absorption=yield per unit area＞bulk density;correlation analysis showed that there was a negative correlation between yield and quality traits in 2 years.The stable time was positively correlated with protein content and water absorption,but negatively with yield.The correlation coefficient between stable time and protein content was higher in 2 years.Based on the correlation analysis,26 new wheat lines in 2 years were grouped into 4 categories by cluster method.The results of clustering were shown in Genotype by trait(GT)biplot and cluster plot,respectively.The clustering results were consistent with the actual performance of the new lines.'Taikemai 4835''Luohan 35''Nongda 162'and'Shannong 611436'were divided into the same type for consecutive 2 years,and these lines were characterized by high yield and good quality.Above results provided theoretical basis for the rational evaluation and popularization of the new wheat lines.