云南稻籼粳亚种间功能性成分含量差异

对111份云南改良稻种和77份元阳地方稻种采用程氏指数法进行籼粳分类,比色法测定抗性淀粉、γ-氨基丁酸和总黄酮含量,并用SPSS软件对数据进行统计分析,结果表明:(1)总体抗性淀粉含量籼型偏籼偏粳粳型,γ-氨基丁酸含量则相反,黄酮含量与籼粳分化的关系不明显;(2)抗性淀粉、总黄酮含量有色米无色米,γ-氨基丁酸含量无色米有色米。总体功能性成分含量有色米无色米,籼稻粳稻,糙米精米,地方种改良种,有色、籼型糙米功能性成分最高,揭示了籼粳分化和米色与抗性淀粉、γ-氨基丁酸与总黄酮含量的关系。

Difference of functional compositions of Indica-Japonica rice landraces in Yunnan

A study on functional compositions of rice included 111 improved varieties of Yunnan province and 77 Yuanyang local varieties. Cheng's index rras used to distinguish indica-japonica rice, spectrophotometry determination content of functional compositions(including resistant starch of polished rice;γ-aminobutyric acid and flavones of unpolished rice), at last SPSS software analysis the data. The main results were as follows:(1)All samples'content of RS was Indica>Indies-like>Japonica-like>Japonica, hut content of GABA wag opposite, the relationship between Flavones and Indica-Japonica type was inconspicuous;(2)Content of RS and Flavones was colored>colorless, but content of GABA was colorless>colored. In a word, as to the functional content, colored>colorless、Indica>Japonica, unpolished>polished, local>improved. The colored, Indica, unpolished, improved type was best. It recovered the relationship between Indica-Japonica type, colored-colorless, local or improved, polished or unpolished ice and functional compositions.