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| Analyse the defoliant sensitivity and yield stability of machineharvested cotton news lines from Xinjiang regional trials |
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| Abstract: |
| Seven materials of Early maturity Machine-harvested group from Regional Trials were spread the same concentration of defoliant and chemical ripening agent in 2014 ,regularly observe the leaf loss and cotton open bolls and calculating output of all Lines，sensitivity to the agent and production stability after applying pesticide quality and production stability of the strains were analyzed. There was no significant difference of defoliation rate when the lines were spread pesticide. There was significant difference of boll opening rate after applying pesticide early. The new 1202 is significantly higher than other materials；The boll opening rate have no significant difference in addition to the new 1202 boll opening rate is significantly higher than other strains outside after applying pesticide in the late. The materialquality traits manifest as: fiber length and fracture strength have yet to be improved. lint yield of the lines have significant difference，the 1202 is the highest yield，the variation degree is 0.3477，high yield and stability performance is better. Machine-harvested Cotton breeding in Xinjiang is focus on high yield and high quality，should also pay attention to improvement of effect of shed leaves at the same time. |
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