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云南农业大学稻作研究所最近从国内外引进的水稻种质资源中发现了一种“爆裂稻”类型,即一种可以专门用来爆制米花的特殊稻米。“爆裂稻”和普通稻比较,二者的区别是在常压条件下可否爆制米花。普通稻米需要高压的膨化设备才能生产出爆米花,“爆裂稻”带壳稻谷在常压条件下用锅炒,可以在2~3min时间内生产出米花。“爆裂稻”的主要特点是在常压下具有极好的爆裂性,其籽粒的爆花率在80%-95%,膨胀倍数可达6~10倍(因品系不同而异,见图1)。 相似文献
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对转基因玉米深加工产品中DNA的提取技术进行了研究。首先,通过经典CTAB法、CTAB初步改良法、CTAB有效改良法和煮沸法等4种方法提取了玉米片和爆米花中的DNA;其次,用琼脂糖电泳检测法将DNA进行了分离;再次,用紫外可见分光光度法检测出4种方法提取的DNA的纯度。结果表明,4种方法中的CTAB有效改良法提取DNA的完整性、纯度更好。 相似文献
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Normal corn germplasm can be used to improve popcorn (Zea mays L.) through 1-2 backcrosses with popcorn as recurrent parents. Popping characteristics of derived lines from popcorn × dent or flint corn crosses play a determinant role in popcorn breeding. Advanced backcross QTL methods can effectively combine QTL identification and plant breeding. 220 selected BC2F2 families developed from a cross between Dan 232, a dent corn inbred line, and N04, an elite popcorn inbred line, were evaluated for three popping characteristics, popping volume, flake size, and popping rate, under two environmental conditions. Using composite interval mapping, a total of 10 significant QTLs were detected, and of these, 2 to 4 QTLs were identified for each trait. Six QTLs had favorable alleles contributed by Dan 232. Comparison with the 15 QTLs detected in the F2:3 families showed that 3 QTLs were the same in both populations. The QTLs should be redetected in generations developed through severe selection. Improved N04 and near isogenic lines could be developed from this BC2F2 population through selfing or another 1 to 2 backcrosses with N04. 相似文献
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用紫外分光光度计测定酸性条件下铅离子与碘化钾及孔雀石绿三元络合物显色体系的吸光度,代入标准曲线方程得到溶液中铅离子的浓度,并用硝酸-过氧化氢湿法消化法对样品进行预处理.结果表明:该显色体系的最大吸收波长为620 nm,反应的稳定性良好,是一种简便准确的爆米花铅含量的测定方法. 相似文献
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