小麦低分子量谷蛋白亚基品质效应的研究

为了在小麦品质遗传改良中更好地利用低分子量麦谷蛋白亚基(LMW-GS)的品质效应,以35个小麦品种为材料,对17种LMW-GS的品质效应进行了研究.结果表明,在 Glu-A3位点,对面筋数量的正向效应为A3c、A3b、A3d、A3e＞A3a,对面筋强度的正向效应为A3c＞A3b、A3d＞A3a、A3e.在Glu-B3位点,对面筋数量的正向效应为B3i、B3d＞B3f＞B3e、B3h＞B3g＞B3j,对面筋强度的正向效应为B3d＞B3h＞B3j、B3e＞B3i、B3f＞B3g.在Glu-D3位点,对面筋数量的正向效应为D3e＞D3c＞D3d＞D3b、D3a,对面筋强度的正向效应为D3a＞D3c、D3e＞D3b、D3d.综合各个亚基的品质效应,本研究提出了包含17种小麦LMW-GS的评分体系,品种品质类型与LMW-GS的对应分析结果验证了LMW-GS品质效应的分析结果.研究结果还表明,不同位点优异LMW-GS的品质效应具有累加作用.

Effect of Low Molecular Weight Glutenin Subunits on Wheat Quality

Low molecular weight glutenin subunit(LMW-GS) plays an important role in wheat quality.Considerable attention has now been focused on identification of LMW-GS composition,while seldom application was performed in genetic improvement of wheat quality.In the current paper,quality effects of 17 LMW-GS from 35 wheat cultivars were studied.The positive effects of LMW-GSs on the quality traits were determined as: at Glu-A3,A3c,A3b,A3d and A3e>A3a for gluten quantity,and A3c>A3b and A3d>A3a and A3e for gluten stre...