对25个抗草甘膦棉花杂交组合的竞争优势分析

Studies on Competitive Advantage of 25 Glyphosate- resistant Cotton Hybrids

利用综合性状较好的3个抗草甘膦棉花材料作特定亲本,与6个从黄河流域引进的非抗草甘膦的棉花品种组配25个杂交组合,对各参试组合进行农艺性状、产量性状、纤维品质等方面进行比较,研究了具有抗草甘膦棉花的杂种优势表现。结果表明:在开花期、吐絮期、成铃进度、脱落率、果枝层数、第一果枝着生高度、单铃重、霜前籽棉产量及籽棉总产量等性状在大多数材料中表现为正向竞争优势,而第一果枝着生节位、生育期等性状在大多数材料中则表现为负向竞争优势,大多数组合的纤维上半部平均长度、断裂比强度优于对照,正向竞争优势明显。筛选出显著增产、综合性状优良的优势组合3个,早熟性状竞争优势明显的组合4个。

Compared agronomic characters, yield characters, fiber quality traits and other characters with Gmianza 1, Heterosis of 25 glyphosate- resistant cotton hybrids made by three glyphosate - resistant cotton materials with excellent syn- thetic properties as specific parents crossed with 6 non - glyphosate - resistant cotton varieties which were introduced from the Yellow River cotton area as another parent was studied. The results tage for the traits of date of first flower, boll maturation period, showed that： there was obvious positive cor.：pet^tive advan- boiling process, branch number, height of the first fruit branch, boll weight, seed cotton yield of Pre frost , seed cotton yield, there were negative competitive advantage for the situ- ation of first branch, the plant growing period in almost hybrids . Most combinations＇ fiber upper half mean length and strength were better than Gianmianza 1 ＇ s, and the positive competitive advantage of above traits in these combinations were significant.3 hybrid combinations with excelent synthetic properties and their yield competitive heterosis increased significantly and 4 hybrid combinations with competitive advantage in earliness traits.