不同海拔高度秋播甘蓝型油菜CMS130A的感温特性研究

目的]为了研究甘蓝型油菜CMS在不同海拔高度下的感温特性变化规律,为CMS的实际生产应用提供理论依据。方法]以甘蓝型油菜CMS130A为材料,于2005年秋季通过在不同海拔高度条件下分期播种,研究甘蓝型CMS的育性变化、感温时期及感温临界值。结果]高海拔地区的初花期较低海拔地区的初花期推迟10~20 d,整个花期缩短2~5 d。不同海拔高度,开花前第8天的日平均温度对130A育性影响均最大。同一不育系在海拔高度750 m时,其临界值为11.7℃;在海拔高度368 m时,其临界值为13.1℃。结论]同一不育系在不同的海拔高度其感温临界值不同,高海拔区其感温临界值为11.7℃,低海拔区其感温临界值为13.1℃。

Study on Thermo-sensitive Characteristics of Brassica napus L CMS130A Sowed at Different Elevations in Autumn

Objective] The purpose was to study the change law of thermo-sensitive characteristics of Brassica napus L CMS at different elevation altitudes and supply theoretical basis for practical production and application of CMS.Method] With B.napus CMS 130A as material,the fertility change,thermo-sensitive stage and critical thermo-sensitive value of B.napus CMS were studied through interval sowing under different elevation altitudes in autumn of 2005.Result] Compared with low altitude area,the first flowering stage in high altitude area was postponed 10～20 d and the whole florescence was shortened 2～5 d.As for different elevation altitudes,the daily average temperature of the 8th day before blossoming all had greatest influence on the fertility of 130A.The critical thermo-sensitive value of the same sterile lines were 11.7 ℃ at altitude of 750 m and 13.1 ℃ at altitude of 368 m.Conclusion] The critical thermo-sensitive values of the same sterile lines were different at different elevation altitudes.It was 11.7 ℃ at higher elevation altitude and 13.1 ℃ at lower elevation altitude.