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为了提高水稻杂交的工效和避免天然杂交,近年来,许多地方采取了离体杂交的方法,但一般结实率不高。为了解决这个问题,湖南益阳地区农科所在采用常规办法的同时,还采取以下措施,取得很好的效果。1.早晨选当天即将开放的稻株,临近地面节间处剪断,最下端一个基节只留1厘米左右,以延长操作时间,避免去雄中开花。2.离体稻株,光合作用减弱,呼吸作用增强。所以,稻株要剪去部分叶片,对留下的3片青叶,除保全剑叶外,其余两片叶也要剪除1/3。3.稻株离体后,应创造适宜的生态环境,确
In recent years, in many places, in vitro hybridization has been adopted to improve the efficiency of hybridization and to prevent natural hybridization. However, the general rate of seed setting is not high. In order to solve this problem, the agricultural sciences in Yiyang Prefecture, Hunan Province, adopted the following measures to achieve good results. 1. In the morning, the rice plant to be opened on the morning of the same day will be cut near the internode, and only one centimeter will be left at the base of the bottom to prolong the operation time and avoid blooming. 2. In vitro rice plants, photosynthesis weakened, enhanced breathing. Therefore, the rice plant to cut some of the leaves, leaving the three green leaves, in addition to save the sword leaves, the remaining two leaves should be cut off 1 / 3.3 Rice plants isolated, should create a suitable ecological environment Indeed