南疆新海21号产量品质性状空间分布研究

Studies on Space-Distribution of Economic Traits on xinhai21 in south XinJiang

以海岛棉品种新海21号为试验材料,研究其棉铃主要经济性状空间分布,结果表明:棉铃在植株上的着生位置不同,其相应的经济性状也存在同株差异。主位铃优于次位铃,在纵向分布中除衣分、马克隆值外的经济性状均具有中段优势,其中8～15节是构成棉花单株产量的主体部分,单铃重高、衣分高,同时纤维品质优良。第9～15节主位铃铃期明显缩短,且具有集中吐絮的优点。棉铃经济性状空间分布的聚类及比较的结果是,8～13节>2～7节>14～18节。第8～10节为经济性状敏感部位,此部位棉铃的发育时期为高产栽培关键时期。作为育种选单株时要注重此部位铃的选择,确保高产与优质。

Studies on space - distribution of economic traits on Xinhai 21 show： The differences of cotton boll position in the same plant resultin differences in economic characters. Traits are advantages in middle sites inplant, except for lint percentage and Mie, and the first boll is superior to that of hype- site. 8 - 15 nodes are main position formingyield per plant. The first boll of 9 - 15 nodes has intensively opener. The result of clustering and comparing is 8 - 13 〉 2 - 7 〉 14 - 18 in space distribution. 8- 10 nodes are the most sensitive position where boll development period is key in fertility culture and breeding.