【摘 要】
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The major storage proteins in maize seed are nearly lysine-free prolamins called zeins,which contribute little to nutritional quality in terms of the protein assimilation.The opaque2 (o2) mutant synth
【机 构】
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Institute of Plant Physiology & Ecology,Shanghai Institutes for Biological Sciences,Chinese Academy
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The major storage proteins in maize seed are nearly lysine-free prolamins called zeins,which contribute little to nutritional quality in terms of the protein assimilation.The opaque2 (o2) mutant synthesizing the decreased amount of zeins has a significantly higher nutrition value,however develops a much softer endosperm texture compared to the wild type.By selecting QTLs,the chalky endosperm of an o2 can be converted to a hard version without affecting its high-lysine trait,yielding the well-known quality protein maize (QPM).The QTLs for endosperm modification are designated as o2 modifiers (Mo2s).Mo2-1 is one of the major QTLs associated to enhanced expression of the 27-kDa γ-zein,which is essential for endosperm modification in QPM.
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