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几对麦谷蛋白亚基对小麦面筋品质的影响

DOI: 10.7685/j.issn.1000-2030.2007.02.002, PP. 6-12

Keywords: 普通小麦,麦谷蛋白等位基因亚基,面筋品质

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Abstract:

麦谷蛋白亚基组成类型是决定小麦加工品质的重要内在因素,改进小麦品种的亚基构成已成为品质育种的重要依据之一,因而鉴定优质亚基的类型对品质育种具有重要的意义。本研究采用郑麦9023/安农9267、皖麦19/安农9267/皖麦19、#445/陕225//安农91168/繁3/皖麦19的F5代株系,烟农19/安农9914、烟农19/安农9916的F3代株系,烟农19/安农9914的F4株系组成9个群体,共1562个株系,分别检测HMW-GS、LMW-GS的组成,测定了和面图参数和SDS沉降值,分析了麦谷蛋白亚基等位基因对品质性状的影响。结果表明,在Glu-A1位点,1亚基的SDS沉降值显著高于N亚基,1亚基的峰高显著大于N亚基,对于和面时间、衰落角(耐揉性),两亚基间差异不显著。在Glu-D1位点,5+10亚基SDS沉降值显著高于2+12,和面图参数中峰高及和面时间5+10显著高于2+12,衰落角差异不明显;2+12亚基与4+12亚基对SDS沉降值及和面图参数的影响差异不显著。Glu-B1位点,SDS沉降值17+18亚基高于14+15亚基,峰高与衰落角两对亚基间差异不显著,和面时间17+18亚基显著高于14+15亚基;对于LMW-GS,Ⅱ-1群体的Glu-D3e亚基SDS沉降值显著高于Glu-D3a,其他3个群体亚基间差异不显著,在和面时间、峰高及衰落角3项指标中,Glu-D3a与Glu-D3e间差异不显著。

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