高品质棉“科棉2号”棉铃发育特性

Boll Developmental Characteristic of "Kemian 2" with High Quality

以高品质棉"科棉2号"为材料,研究高品质棉的棉铃发育及形成规律。结果表明:科棉2号棉铃在发育过程中,具有"库容"较强的生理优势,单铃铃壳重高于常规棉"泗棉3号",两者铃壳干重最大值分别为2 11g和1 43g;但科棉2号未受精胚珠和受精后败育胚珠较多,单铃不孕籽率达27 52%,比泗棉3号18 99%高8 53个百分点;科棉2号光合产物多,但结籽效率低,这是其单铃纤维积累量较少的主要原因。

The boll development and formation of 'Kemian 2' with high quality was studied in this paper. The results showed that: Kemian 2 showed relatively strong physiological advantage in 'source'. Dry weight per boll shell of Kemian 2 was higher that of conventional cotton 'Simian 3', the maximum value of diy weight per boll shell of Kemian 2 and Simian 3 were 211 g and 143 g, respectively. Compared with Simian 3, Kemian 2 had more unfertilized and useless ovules after fertilization, the ratio of nonpregnant seed increased by 853 percentage point. Although accumulation amount of photosynthetic matter increased, lower seed setting rate was main reason for Kemian 2 had less the accumulation amount of fiber per boll.