Correspondence Analysis and Partial Correlation Analysis to Yield and Quality Traits in Wheat

The correspondence analysis and partial correlation analysis were applied to analyze twelve traits of yield and quality for 19 varieties,which were examined in the winter watered group with high fertilizer rate from variety regional trials in the year of 2006 and 2007 in He'nan Province.The results of the correspondence analysis divided the varieties into three categories.The first category includes nine varieties with high-yield and medium quality.The second category consists of two varieties with medium-yield and medium-quality; The third group includes eight varieties with low-yield but medium-super quality.The target for variety improvement in each category was discussed.Based on the result of the partial correlation analysis,the effective way for achieving high-yield and good-quality in wheat is the increase in grain numbers per spike,1000-grain weight and grain volume weight.