甘薯高光效育种技术探讨

Discussion on Sweetpotato Breeding Technology of High Photosynthetic Efficiency

通过对本课题组近年来所选育的高光效类型系列品种(品系)的特征特性进行综合分析,探讨了甘薯高光效育种技术。结果显示:甘薯高光效育种的开展非常必要且切实可行,其育种目标为在杂交后代早期选拔减小种植密度,使其杂交后代无性系充分发育,减少株间和行间竞争,并且应主要鉴定质量性状;另外甘薯高光效品种应具备的优良性状为短蔓多分枝,株型半直立,经济系数高,同时具备优质、抗病、早熟等优良性状。高光效品种具有更高的增产潜力和实现机械化收获的特性,容易被企业和种植户所接受,在今后育种中我们应当加大该类型品种的选育和开发。

This paper discusses the technology of high photosynthetic efficiency breeding on sweetpotato by comprehensive analyzing the sweetpotato varieties of the high photosynthetic efficiency type in recent years.The results showed that：sweetpotato breeding for improving the efficiency of photosynthesis is necessary and feasible,and the breeding objective is that the qualitative character should be the main quality and the planting density should be reduced in the early selection of the filial generation and make its clones develop well,have the less competition between the plants and between the rows.The sweetpotato variety of the high photosynthetic efficiency should have the improved characters that the short multi-branches,the half-erect plant types,the higher economic coefficient,and high quality,disease-resistant,early-ripe,as well as.It will be accepted easily by firms and farmers because of the character of the more potential for increasing production and realizing the mechanize harvest.We should increase the breeding and the development of the high photosynthetic efficiency type in the next.