水稻有几种去雄法,但都是用手逐穗逐花地进行授粉。要获得大量杂交种子供遗传研究之用,就需花费大量时间。采用接触杂交法既可提高杂交结实率,又可减少工作量和节省亲本。大多数杂交在温室进行,9至12月或1至4月均可。这段时期日照短,各种感光型品种都能杂交。在秋天成熟的 F_1 杂种可在春天播种,并在这个时期内成熟,至夏天就可在大田中获得 F_2 代。虽然冬季光照弱,但用接触法结实率仍高。上午10点前和下午3点后剪去1/3颖壳,真空去雄。用一个0.1毫升每分钟能换25升空气的真空泵,再接上一个细玻璃咀就可除去花药。当上部小花花药开始伸长时开 There are several ways to go male rice, but are hand-by-flower by flower pollination. It takes a lot of time to get a lot of hybrid seeds for genetic research. The use of contact hybridization can improve seed setting rate, but also reduce the workload and save the parents. Most hybridization is carried out in the greenhouse, from September to December or from January to April. Short period of sunshine, a variety of photosensitive varieties can hybridize. F_1 hybrids that mature in the fall can be sown in the spring and mature during this period, reaching F 2 generation in the field by the summer. Although the winter light is weak, but the contact rate is still high seed setting. Cut off 1/3 glume shell before 10 o’clock in the afternoon and after 3 o’clock in the afternoon, go to the vacuum to sterilize. With a 0.1 ml per minute for 25 liters of air for the vacuum pump, then connected to a thin glass Tsui can remove anthers. Open when upper flower anthers begin to elongate