Abstract:

The study of agronomic traits of wheat germplasm resources can provide a reference for wheat parental selection and hybrid offspring selection, wheat germplasm resource innovation and new variety breeding. In this paper, 35 wheat germplasm materials were used to analyze the correlation, path and cluster analysis of 8 agronomic traits. The results showed that the coefficient of variation of spike formation rate was the largest, and the other traits from high to low were plant height, grain number per spike, 1 000-grain weight, effective spike, grain weight per spike, yield and growth period. There was a significant positive correlation between grain number and grain weight per panicle and yield. Through path analysis, it was found that effective panicle, plant height, grain number per spike and 1 000-grain weight had a positive contribution to the agronomic traits of wheat germplasm resources. From the perspective of yield components, increasing the effective panicle, grain weight per spike and 1 000-grain weight can increase the yield. With a Euclidean distance of 80, 35 germplasm materials can be divided into 4 categories. This study showed that these wheat germplasm resources were rich in variation types, and they could be selected according to the correlation between traits.

Key words: wheat, germplasm resources, agronomic traits, correlation analysis, cluster analysis