一个低糊化温度水稻突变体(Mgt-1)的培育与稻米品质特征研究  

DEVELOPMENT OF A LOW GELATINIZATION TEMPERATURE MUTANT(Mgt-1) OF RICE AND ITS GRAIN QUALITY CHARACTERS

作　　者：舒庆尧[1] 池晓菲[1] 陈善福[1] 吴殿星[1] 吴平[2] 

机构地区：[1]浙江大学核农学研究所,浙江杭州310029 [2]浙江大学生命科学学院,浙江杭州310029

出　　处：《核农学报》2001年第6期341-344,共4页Journal of Nuclear Agricultural Sciences

基　　金：国家自然科学基金 (# 39830 2 5 0 );浙江省 8812专项

摘　　要：在籼型细胞质雄性不育保持系Ⅱ 3 2B干种子经 3 0 0Gy60 Coγ射线辐照照育成的多种叶色突变系中 ,经稻米品质测定 ,筛选到 1个叶色黄化的低糊化温度突变体 ,定名为Mgt 1。稻米用 1 7%KOH处理 ,测得对照Ⅱ 3 2B的碱消值为 2级左右 ,而Mgt 1达 6～ 7级。Mgt 1的表观直链淀粉含量 (AAC)为 2 5%左右 ,与对照Ⅱ 3 2B差异不显著。用粘度速测仪 (RVA)测得的Mgt 1的米粉粘滞性谱 (RVA谱 )与对照Ⅱ 3 2B的存在一定差异 ,Mgt 1的消减值 (SBV)变小 ,热浆粘度 (HPV)显著变大 ,崩解值 (BDV)和回复值 (CSV)显著变小 ,但最高粘度 (PKV)和最终粘度 (CPV)基本相仿。Mgt 1的发现将为研究GT特性的物质基础及遗传特征提供理想的材料。A low gelatinization temperature (GT) rice mutant is developed by treatment on dry seeds of an indica cytoplasmic male sterile(CMS) maintainer Ⅱ32B with 300Gy of 60 Co γ\|rays,and named as Mgt\|1.The mutant is also a leaf color mutant which shows lifetime yellow leaves.The cooking and eating quality characters of Mgt\|1 and Ⅱ32B were analyzed.The ASV(Alkali Spreading Value) of Ⅱ32B is about 2～3 in a 2～7 score system,while that of Mgt\|1 is up to 6～7 when treated with 1\^7% KOH.Mgt\|1 has AAC(Apparent Amylose Content) of about 25%,with no significant difference from that of Ⅱ32 B.The RVA profiles of Mgt\|1 and Ⅱ32B are different in some characters.The PKV(Peak Viscosity Value) and CPV (Cool Paste Value) of Mgt\|1 is similar to,SBV(Setback Value)smaller,and HPV(Hot Paste Value) bigger than that of Ⅱ32B.Consequently the BDV(Breakdown Value) and CSV(Consistence Value) of Mgt\|1 was markedly less than that of Ⅱ32B.The above results implied that the GT character could be improved by mutation induction without changing its AAC.Mgt\|1 will also serve as an ideal material for studying substantive basis and heredity characteristic of GT.

关 键 词：水稻 Γ辐射 稻米品质 糊化温度 突变体 

分 类 号：S511.21[农业科学—作物学]