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对１８个陆地棉品种（系）的子指、子叶面积与棉纤维品质指标的相关性分析结果表明：子指和子叶面积与纤维长度、强度、细度、断裂长度、成熟度的相关趋势相一致，子指与纤维长度呈极显著正相关，与成熟度呈正相关，而与强度呈显著负相关；子叶面积与纤维长度呈极显著正相关，与成熟度呈显著正相关，与强度呈显著负相关。初步认为子叶面积和子指可作为棉花育种中纤维品质的间接选择性状和指标。
The correlation analysis of sub-index, cotyledon area and cotton fiber quality index of 18 cultivars (lines) showed that the trend of sub-finger and cotyledon area and fiber length, strength, fineness, rupture length and maturity There was a significant positive correlation between sub-index and fiber length, a positive correlation with maturity, and a negative correlation with intensity. Cotyledon area had a significant positive correlation with fiber length, a positive correlation with maturity, and a significant positive correlation with fiber strength Negative correlation. It is preliminarily thought that the cotyledon area and sub-finger can be used as indirect selection traits and indexes of fiber quality in cotton breeding.