Correlation and Path Analysis Between Stalk Characters and Power of Stalk Resisting Breaking in Maize

The relations of correlation and path between 9 stalk characters and the power of stalk resisting breaking per unit volume(UVSRP) were analysis,with a set of diallel crosses in maize were used experiment material.The result showed that the spindle length of tassel had extremely significant positive correlation with UVSRP,everyone of them had extremely significant negative correlation with UVSRP,for the fresh plant weight below ear,stalk length below ear,fresh stalk weight,plant height,ear height,or the rate between length and width of stalk,one of them had significant negative correlation with UVSRP,for the average length of joints below ear and plant height,and the correlation between the stalk width and UVSRP was not significant.The result of path analysis showed that the fresh stalk weight,the average length of joints below ear,the plant height and the spindle length of tassel had fairly positive direct effect to UVSRP.The stalk length below ear,the fresh plant weight below ear,the rate between length and width of stalk,the stalk width and the ear height had fairly negative direct effect.We should not raise the biological yield of maize by increasing of the stalk length below ear and the average length of joints below ear.Proper spindle length of tassel could be regard as a important reference trait while selecting maize varieties with good power of resisting stalk broken.