脱毒小薯的生产技术与生产体系的研究

在防蚜虫温室中利用液体培养基繁殖马铃薯脱毒苗。将成束小苗栽植于(石至)石作基质的育苗盘中作为基础苗,并连续剪取主茎和侧枝的顶芽进行扦插。与直接利用瓶苗进行扦插相比,小苗成活率高,结薯个数较多,显著降低生产成本。同时研究了育苗盘繁殖无毒小薯的适宜密度。根据对有翅桃蚜飞迁测报,提出了我国中原区的良种繁育体系。

STUDY ON THE TECHNIQUE OF PRODUCING VIRUS-FREE MINI-TUBERS OF POTATOES

A liquid cultural media was used to propagate virus-free plantlets of potatoesin the screened insect-proof house.Bunches of plantlets as basic seedlings werecultivated in the plastic plates with vermiculite sabstratum.Terminal buds cat in succession from the main stems and branch stems ofthese mother plants were planted in the plates to reproduce mini-tubers.Ascompared with cutting propagation of plantlets in bottle,the survival rate ofseedlings and the number of mini-tubers per piantlet increased and the cost ofproduction was reduced significantly.Suitable planting density for propagating virus-free mini-tubers in the plasticplates on a large scale was studied as well.Based on estimating the size of wing-ed aphid population during Spring and Summer,a system of high-quality seedbreeding in Central Plains of China was put forward.