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各国科学家对四倍体海岛棉、陆地棉及二倍体中棉、草棉的不同熟期品种进行种内或种间杂交的大量研究结果表明:早熟或中早熟间的杂种优势高于晚熟或中晚熟间的杂种优势。根据我国目前生产上麦后(套)棉与前作的季节冲突及北方特早熟棉区对早熟品种的需求,提出利用我国杂交棉研究和应用的基础优势及早熟杂交棉自身所具有的特点,进行陆地棉种内早熟杂交种的研究,同时引进早熟海陆杂交种进行种植及配套栽培技术的研究,从而为麦后(套)棉地区及北方特早熟棉区提供早熟丰产及优质抗病的杂交棉花品种。
A large number of studies by scientists from different countries on intraspecific or interspecific hybridization of tetraploid island, upland, and diploid cotton and cotton cultivars show that the heterosis of early maturity or middle-early-maturity is higher than that of late maturity or middle- The mid-late maturity of the heterosis. According to the seasonal conflict between cotton production in China and wheat production in the past and the demand of precocious varieties in especially precocious cotton area in our country, we put forward the basic advantages of research and application of hybrid cotton in our country and the characteristics of hybrid cotton of early maturity The study on early-maturing hybrids of upland cotton and the introduction of early-maturing hybrids of land and sea for planting and cultivation techniques will provide hybrid cotton with early maturity, high yield and disease resistance Variety.