论文部分内容阅读
目前我们培育新品种主要是采用有性杂交的方法,如果要想获得一个既早熟又高产的新材料,首先必须选用熟期差异大,地理远缘的双亲进行交配,才能使子代出现一个具有双亲优点的早熟高产的新品种。然而我区处于高寒地带,活动积温仅有2200～2500度,种植2500度积温的晚熟品种一般不能正常成熟,最近我们利用谷子短光照的特点,对晚熟亲本遮光,减少光照时数,使之达到花期相遇。实践证明,这个方法能使熟期差异大的双亲,获得花期正需相遇的良好效果。
At present, we breed new breeds mainly by means of sexual hybridization. If we want to get a new material that is both early and high yield, we must first choose the parents with big differences in geography and geographically distant mating to make the offspring have a Parents of the advantages of early maturity and high yield of new varieties. However, my area is in the alpine zone, the activity accumulated temperature is only 2200 ~ 2500 degrees, the cultivation of 2500 degrees accumulated temperature of late-maturing varieties generally can not mature normally, we use the characteristics of millet short light, late-maturing parents to shade, reduce the number of hours of illumination to reach Flowering meet. Practice has proved that this method can make the difference between the parents of large differences in access to flowering need to meet the good results.