Analysis of Agronomic Traits and Adaptability Evaluation of Foxtail Millet Germplasm Resources in Yulin Area
In this study,96 foxtail millet varieties were used as materials,and the adaptability of each mil-let variety in the Yulin area was evaluated by comparing their parameter changes such as growth period,spiny coat color,ear type,agronomic traits,and yield.Correlation analysis,principal component analysis,grey corre-lation degree,and cluster analysis were used to analyze the correlation between their main agronomic traits.The results showed that except for GZ17 and GZ30,the other varieties could mature normally,with the growth period ranging from 73 to 122 days.Among the spiny coat colors,green,yellow,and purple were 30.9％,39.4％,and 29.8％,respectively.The chicken beak shape,spindle shape,cylinder shape,stick shape,cat's claw shape,and duckbill shape were 23.4％,23.4％,35.1％,13.8％,3.2％,and 1.1％,respectively.The coeffi-cient of variation of agronomic traits ranged from 9.78％to 33.31％,with the highest coefficient of variation be-ing 36.1％for single ear grain and the lowest coefficient of variation being 9.78％for plant height.Except for the negative correlation between the number of tillers and yield,the other traits were positively correlated with yield,and the correlation coefficient between grain weight and yield was the greatest.The cumulative contribution rate of the first five principal components reached 89.45％,and the contribution rate of the first principal compo-nent was 41.32％.The correlation between each trait and yield was as follows:single panicle grain weight>plant height>main panicle diameter>thousand-grain weight>main stem panicle length>number of main stem nodes>tillers.Cluster analysis showed that 96 foxtail millet germplasm resources were divided into three groups,with 48 resources in group Ⅰ,22 resources in group Ⅱ,and 24 resources in group Ⅲ.Comprehensive a-nalysis showed that the grain weight of single ear in the improvement of foxtail millet varieties can be used as the priority improvement object,and foxtail millet varieties GZ28,GZ68,and GZ83 are the most suitable for plant-ing in Yulin.
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