高品质陆地棉纤维品质形成特点的研究

以常规棉苏棉16为对照,研究了高品质棉渝棉1号、高品质Bt棉科棉1号的纤维发育及品质形成特点。结果表明,与苏棉16相比,科棉1号和渝棉1号纤维快速伸长期略长,快速伸长期内的长度日增长速率较高;比强度快速伸长期较短,但在快速伸长期内的增长速率较高;纤维素含量随着花后天数呈增加趋势,17 d内的增长速率很低,17 d后速率明显加快,至花后24 d呈直线上升趋势,到花后45 d时纤维素含量基本稳定。与苏棉16相比,渝棉1号和科棉1号花后IAA含量较高;花后17 d ABA含量较高,花后24 d的ABA/IAA较高,说明不同基因型纤维发育和品质建成过程的差异与其纤维细胞内的激素变化有关。

Characteristics of Cotton Fiber Quality Development in High Quality Upland Cotton

With Sumian 16 as control,the characteristics of fiber quality development of high quality upland cotton(G.hirsutum L.) Kemian 1 and Yumian 1 were studied.Compared with Sumian 16,rapid fiber elongation duration of Kemian 1 and Yumian 1 was slightly longer,and elongation rate during this period was significantly higher.Rapid fiber strength growth rate was also higher than that in Sumian 16.The cellulose content in cotton fiber increased slightly within 17 DPA(days post anthesis),increased rapidly after 17~(th) day,and reached the peak at about 45 DPA and became stable.IAA content in cotton fiber in Kemian 1 and Yumian 1 was higher than that in Sumian 16,which was beneficial to fiber differentiation and elongation.ABA content in fiber in Kemian 1 and Yumian 1 at 17 DPA was also higher than that in Sumian 16,which benefited the transformation from fiber elongation growth to secondary wall thickening.The ratio of ABA and IAA at 24 DPA was higher in Kemian 1 and Yumian 1,which was also beneficial to secondary wall thickening.