四个杂交粳稻的蛋白质、赖氨酸、直链淀粉含量和MDH活性测定

本文分析比较了正在大面积推广种植的杂交粳稻寒优１０２７以及３个新选育的杂交粳稻８优１６１、寒优１９５和寒优３５６的蛋白质含量、赖氨酸含量、赖氨酸相对合量、直挂淀粉含量和苹果田脱氢酶（ＭＤＨ）活性．结果显示了３个新选育的杂交粳稻分别在不同的方面胜过对照寒优１０２７．寒优１９５的直链淀粉合量（１２．１％）明显低于对照寒优１０２７（１７．０％），赖氨酸的相对合量（３．６８％）高于对照寒优１０２７（３．１８％），统计分析两方面的差异都达极著水平（Ｐ＜０．０１）；８优１６１的蛋白质含量（９．６９％）比对照寒优１０２７（８．７８％）高１１．１％，统计分析差异达极显著（Ｐ＜０．０１）；寒优３５６４白质含量（９．１５％）比对照寒优１０２７高．出５．５％，两者差异也达极显著（Ｐ＜０．０１），而且寒优３５６在苗期的ＭＤＨ活性高于对照寒优１０２７，统计分析两者差异显著（Ｐ＜０．０５），这表明寒优３５６在生长后期的每生日穗总粒数，每穗实粒数和每实粒重可能会超过对照寒优１０２７．建议有关部门在今后的水稻生产中，可根据各自不同的需要，推广利用不同的杂交粳稻．

The Content Analyses of Protein,Lysing & Amylose and MDH Activity in Different Varieties of Japonica-Type Hybrid Rice

The contents of protein, lysine and amylose, and MDH activity in three sorts of japonicatype hybrid rice-Bayou 161, Hanyou 195 and Hanyou 356 selected recently were analysed and compared with the japoniot-type hybrid rice-Hanyou 1027 planted on a large scale now. The results indicated: (1 )The amylose content of Hanyou 195 rice was lower than the content of Hanyou 1027 rice;and the relative content of lysine of the Hanyou 195 was hisher than the content of Hanyou 1027 rice. (2) The protein content of Bayou 161 riCe was 11. 1 % higher than the content nof Hanyou 1027 rice. (3)The protein content of Hanyou 356 rice was 5. 5% hasher than the content of Hanyou 1027 rice There was a possibility that the yield of Hanyou 356 rice was hasher than the yield of Hanyou 1027 rice.