【摘要】 采用NCII设计,以5个不同类型的棕色棉品种(系)为母本,3个棕色棉品种(系)为父本配制15个杂交组合,分析了棕色棉品种(系)杂交组合产量性状的配合力和杂种优势表现。结果表明,产量性状受加性和显性效应共同控制,籽棉产量、铃重和籽指的一般配合力(加性)和特殊配合力方差均极显著,皮棉具极显著的特殊配合力(显性)方差,衣分和单株铃数的一般配合力(加性)方差均达极显著。杂种优势分析表明,各产量性状(除籽指外)均具有显著的正向中亲优势;产量构成因素的优势为单株铃数>铃重>衣分。利用不同类型棕色棉品种(系)配制的杂交组合,F1代皮棉产量增产显著达22%以上,且色泽遗传较稳定。更多还原

【Abstract】 The crosses were made by using natural coloured brown cotton to analyze high parent heterosis,mid-parent heterosis and competitive heterosis and combining ability effects for yield characters and component of yield.The results showed that all yield traits were mainly controlled by the additive effects and by domaint effects.The GCA(general combining ability)and SCA(specific combining ability) variances were significant at 1% level for seed cotton yield,boll weight and seed index.The SCA variances of lint yield were significant at 1% level.The GCA variances were significant at 1% level for lint percentage and boll number per plant.The heterosis of yield component was boll number per plant,boll weight and lint percentage in descending order.The average mid-parent heterosis of yield character had positive heterosis at 1% level.The lint yield of F1 generation was significantly increased by more than 22% and genetic colour and lustre were stable.更多还原