内蒙古东部早熟高产型春小麦新品种选育技术与理论初探

本文从小麦育种的技术与理论两个方面进行了探索，并提出了在内蒙古东部早熟区的生态条件下，选育高产类型品种的限制因素及再提高产量的途径，即在保持原基本穗数600万穗／hm2不变的基础上，通过改变株型穗形，增加单穗粒重来达到高产之目的。增加穗粒重的主要途径是从遗传上改变穗顶部及基部的结实性，最终增加单穗有效粒数来完成的。增加单穗粒数比提高粒重更为可靠，因粒重在一定程度上易受环境条件影响。

Initial Discussions on the Breeding Technology and Its Theory for New Variety of Early-Ripening High-Yield Spring Wheat in Eastern Inner Morgolia

In this article, restrictions of selecting High - yield wheat variety and yield - raisingmeasures wenepresented under the ecological canditions of the premature region in eastern InnerMorgolia with the discussion conducted from two respects of technology and the for wheatbreding, Viz, on the basic of keeping original 6 million ears/hm2 fixed, high yield was reachedby both changing stem pattern and ear shape and by raising grainweight per ear Bcause. The mainchannel of raising grain weight was genetically changing the fruit bearing on top and botom of anear, and ultimately raising the effective number of grain Per ear Because of the susceptibility ofgrain weight to the environment to some extent, raising the grain number of a single ear was morereliable compared with the weight raising.