摘要： 对四个陆地棉品种（系）的铃重、衣分、子指和纤维长度在棉株不同节位表现的研究表明，各性状的低值有较明显的分布规律，一般出现在下部1～3果枝节位、上部果枝节位和中部果枝的外围节位上；高值和中值多出现在中部果枝的1～2节位；5～9果枝的第一节位很少出现低值。

关键词: 陆地棉, 经济性状, 位置效应

Abstract: The experimental results from four upland cotton varieties(lines)indicated that the different positions of cotton bolls on the same plant differently affected them ain economic traits such as bollw eitht,lint percentage,seed index,and fiber length. A rulew as found for the distribution of the lower values of the traits.They were distributed on the first to third joints on the lower branches and the outer joints on the upper and middle branches.The high-er and middle values appeared mainly at the first and second joints on the middle branches .The lower values seldom appeared at the first joints on the fifth to ninth branches .

Key words: Upland cotton, Economic traits, Effect of position

中图分类号: 

• S562