关键词: 棉花; 早中熟品种; 果枝数; 果节数; 成铃结构

Abstract: 【Objective】 The aim of this study is to reveal the fruit branch number and distribution, the number of fruit nodes and the relationship between fruit branches and bolls of 182 early and medium maturing cotton varieties (lines) in southern Xinjiang in the hope of providing theoretical basis for high yield breeding. 【Method】 The fruit branch, fruit node and boll number per plant of 182 early and medium maturing cotton varieties were studied through comparative analysis under the cotton growth climate condition in Southern Xinjiang . 【Result】 The results showed the range of the fruit branch number, fruit node number and boll number per plant of 182 early and medium maturing cotton varieties were 4.6-10, 7.6-21, 5.4-12.2, respectively, and the ratio of interior boll number and exterior boll number was 3∶1; .The fruit node number and boll number per plant increased with the increase of fruit branch number, fruit node number and boll number per plant were different in different varieties. The number of fruit branches was significantly positively correlated with the number of nodes, boll number, inner boll number and upper part boll number, and the number of fruit nodes was significantly positively correlated with the boll nmber, interior boll number, exterior boll number, lower part boll number and middle part boll number. 【Conclusion】 Under the climatic conditions of southern Xinjiang, cotton varieties with the number of fruit branches 8-10 and fruit nodes 18-20 should be selected, which is more beneficial to make full use of the limited heat and accumulated temperature conditions in southern Xinjiang to form a higher yield.

Key words: cotton; cotton varieties; fruit branch; fruit node; population structure of boll