亚海陆杂种棉主要经济性状优势表达规律初探

亚海陆杂种棉在经济性状方面表现的优势特征如下:植株高度一般无明显竞争优势,但单株结铃数有正向竞争优势,单铃重的竞争优势多为负向;不孕籽率与亚海岛棉亲本相比普遍表现下降趋势;籽棉和皮棉产量的中亲优势皆为正向优势,但竞争优势多为负向优势;霜前花率大多数组合具有正向竞争优势,而僵瓣花率的竞争优势皆为负值;纤维绒长普遍表现正向竞争优势;比强度也普遍具有明显的正向竞争优势;马克隆值的中亲优势虽然多为正向,但竞争优势皆为负向。

Preliminary Exploration on Heterosis of Major Economic Traits of Sub - interspecific Hybrid Cotton

The sub-interspecific hybrid cotton exhibits the following heterosis in economic traits: plant height has no significant competitive heterosis, but the number of bolls per plant has positive competitive heterosis, boll weight mostly has negative heterosis; the rate of sterile seeds decreases generally in comparison with the parents of sub-sea-island cotton. Seed cotton yield and lint yield show positive mid-parent heterosis, but their competitive heterosis is usually negative. Rate of pre-frost flower of most combinations has positive competitive heterosis, while the rate of rigid flower is negative. Fiber length and fiber strength usually have positive competitive heterosis. Micronaire value mostly has positive mid-parent heterosis, but its competitive heterosis is negative.