【摘要】 117AB自交系经在湛江冬播自交5代,不育株率已达75%~80%。其不育株转为可育的温度为18~20℃。由于湛江早春升温过快,花前处于18~20℃的日数少,不育株转育率低,进一步纯合及纯合后的繁殖难度较大。因此,拟利用昆明夏季的中温条件进行进一步纯合及繁殖。将117AB自交系在昆明进行春播(4月下旬),调查了不育株育性转换率及转育后的可育天数,并考察了其部分农艺性状。结果表明:昆明春播117AB自交系花期(7~8月)的平均温度在19.9℃左右,出现半不育和可育温度的频率达到68.9%,而湛江仅达到36.2%,昆明不育株的转育株率为60.9%,而湛江仅为32.5%,农艺性状也较好,由此认为昆明适合117AB自交系的进一步纯合及繁殖。更多还原

【Abstract】 Though 5 generation selfing at winter in Zhanjiang,the sterile plants rate of 117AB selfing lines reached 75 %-80 %,it’s fertile temperature was 18-20 ℃.In Zhanjiang,the early spring’s temperature admanced too fast,so that the days,in which temperature between 18-20 ℃ before flowering was few,and the fertility alteration rate of sterile plants was low.There will be many difficulty to purify and propagate.Sowing 117AB selfing lines at spring(the last ten days of April) in Kunming,the fertility alteration rate of sterile lines,and partly agronomic trait was investigated.The result showed as follow:When sowing 117AB selfing line at spring in Kunming,the mean temperature at flowering time was about 19.9 ℃,and the rate of partly sterile or fertile reached to 68.9 %,but 32.16 % in Zhanjiang.In Kunming the fertility alteration of sterile plants was 60.9 %,but in Zhanjiang,the rates was 32.5 % only.The agronomic trait of 117AB selfing line was fine.As a result,it was suitable for further purify and propagate 117AB selfing lines in Kunming.更多还原