高产简化抗虫棉新品种沧198的选育研究

针对抗虫棉常规株型精细整枝、早衰严重，且整枝繁、工序多、劳动效率低的问题，依据叶枝的生育特点，创新了扩行缩株、非化控、叶枝早摘心、1株多茎育种新技术；采用多亲本杂交、病圃连续选择、株型定向培育方法，育成简化高产抗虫棉新品种沧198。该品种在河北省区域试验中，采用常规株型种植，籽棉增产10．8％～15，8％；采用多茎栽培，节省整枝用工70％，籽棉产量达3871．7～4900．5kg／hm^2，增产12．4％～22．3％，且纤维品质优良，抗逆性增强。确定的配套栽培技术简便易行，可操作性强。

Breeding of High-yield Simplified Insect-resistant Cotton New Variety Cang 198

There were some problems in the fine pruning of insect-resistant cotton such as complex working procedure,low efficiency,and sever plant premature senility.Based on the growth characteristics of leafy shoots,the new breeding technology including enlarging row spacing and narrowing plant spacing,non-chemical controlling,early pinching of leafy shoots,and multi-stem pruning shape.The high-yield simplified insect-resistant cotton new variety Cang 198 was bred by the methods of multi-parental crossing,continuou...