Relationship between Meteorological Factors and DUS Test Measurement Traits of Sunflower
To clarify the relationship between major meteorological factors and DUS testing traits of sunflower,a study was conducted from 2017 to 2022 in Bayannur,Inner Mongolia.Meteorological data and DUS testing traits of four sunflower varieties were investigated at the fixed location.The variance analysis method was used to study the annual changes of DUS testing traits of each variety,and then the correlation analysis was conducted to clarify the relationship between sunflower quantitative traits and meteorological factors.The stepwise regression and path analysis methods were used to screen out the major influencing meteorological factors.It was found that temperature and moisture were the most important meteorological factors affecting flowering period,leaf size,plant height,and head size,while light had only a certain impact on flowering period.The major meteorological factors affecting seed thickness and seed size were minimum temperature and average relative humidity.
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