香稻品种2-乙酰-1-吡咯啉多样性及籽粒分布特征的研究

DIVERSITY OF 2-ACETYL-1-PYRROLINE CONTENT IN AROMATIC RICE (Oryza Sativa L.) VARIETIES AND DISTRIBUTED CHARACTERISTIC IN SEEDS

采用田间试验方法研究同一地点和时间种植、同一栽培条件下2-乙酰-1-吡咯啉在11个香稻品种间差异性及籽粒分布特征。结果表明,桂香丝糯、中健2号、清香米、泰国香稻1号R207和Texmati等5个品种含有2-乙酰-1-吡咯啉,精米与糠中的2-乙酰-1-吡咯啉含量在上述5个品种间存在显著差异(P<0.05),其中Texmati精米和糠中2-乙酰-1-吡咯啉的含量最高,分别为0.6765和0.1738mg/kg,桂香丝糯精米和糠中2-乙酰-1-吡咯啉的含量最低,分别为0.0452和0.0173mg/kg。2-乙酰-1-吡咯啉在香稻籽粒中分布特征为90%以上分布于精米,不足10%分布于糠,稻壳中未见2-乙酰-1-吡咯啉分布。

Field experiments were performed to study the different contents of 2-acetyl-1-pyrroline in 11 aromatic rice varieties grown in the same place and same time with the same cultivation conditions and their distribution characteristics in seeds.The results showed that 5 aromatic rice varieties（Guixiangsinuo,Zhongjian 2,Qingxiangmi,Taiguoxiangdao 1 R207 and Texmati） contained 2-acetyl-1-pyrroline,and 2-acetyl-1-pyrroline concentrations in milled rice and bran in those 5 varieties varied significantly（P〈 0.05）.The highest level was found in Texmati with 0.6765mg/kg in milled rice and 0.1738mg/kg in bran,whereas the lowest level in Guixiangsinuo with 0.0452mg/kg in milled rice and 0.0173mg/kg in bran.The 2-acetyl-1-pyrroline was distributed mostly in the milled rice part（more than 90% of total content in rice grain）,and only 10% in the bran and no any 2-acetyl-1-pyrroline was found in chaff.