摘要： 对我国“七五”期间30个低酚棉育种亲本全株吐絮棉铃的结构进行了数值分析。星座图聚类与灰色评价结果表明，星座图中五类亲本的棉铃组份产量值呈顺时针方向梯度性递减。中熟和中早熟品种中普通棉多为优良亲本，低酚棉多属一般亲本，多数早熟品种为劣等亲本。优良亲本的棉铃干物质在棉絮中的比例较大，劣等亲本则向棉仁内转移的比例较高。多级通径分析结果表明，不同种类亲本棉铃性状间的相互关系各异，而与亲本类的性质有一致关系。

关键词: 低酚棉, 棉铃结构, 星座图, 灰色评价, 结合系数, 多级通径分析

Abstract: Numerical analysis on the cotton boll structure in thirty breeding parents of gland-less cotton cultivated in period of the Seventh Five-Year Plan in China was carried out when the bolls in the whole plants opened completely. The results of star site cluster and grey system analysis indicated that the cotton boll composition yield value of five groups of breeding parents decreased clockwise and progressively in the star site cluster chart. Excellent common and inferior class of parents generally belonged to mid ripening and early-mid ripening glanded cotton,mid ripening and early-mid ripening glandless cotton and early ripening cotton varieties respectively. The dry matter in boll of excellent class of parent was centralized by lint,and that of inferior one-by kernel. The results of multi-level path coefficient analysis indicated that the relationship between characters of cotton bolls belonging to different parents was different,and it had consistent relation to the characters of parent groups.

Key words: Glandless cotton, Cotton boll structure, Star site, Grey system evalua-tion, Coherence coefficient, Multi-level path analysis