Abstract: Malondialdehyde(MDA)is the final product of lipid peroxidation,and its content can reflect stress tolerance of plants.By employing a recombination inbreed line(RIL)population involving 247 lines derived from an indica-indica cross Zhenshan 97B× Milyang 46,a linkage map consisting of 207 DNA markers was used for genetic analysis and gene mapping of malondialdehyde(MDA)content in rice leaves.The MDA content in the RIL population showed transgressive segregation.Two QTLs for MDA content of rice leaves were detected at intervals RG532-RG811 and RG381-RG236 on chromosome 1,accounting for 4.33% and 4.62% of phenotypic variation.Their additive effects were from both of parents.

Key words: rice, leaf malondialdehyde content, quantitative trait loci

摘要： 丙二醛（MDA)是膜脂过氧化的终产物，其含量可用来反映植物对逆境条件的反应强弱。利用由247个株系组成的珍汕97B/密阳46重组自交系（RIL）群体及其分子标记连锁图谱，检测了控制水稻丙二醛（MDA）含量的数量性状基因座位（QTL）。所测性状在RIL群体中出现超亲分离。在第1染色体的RG532-RG811和RG381-RG236标记区间，共检测到2个控制水稻叶片MDA含量的QTL,加性效应分别来自母本珍汕97B和父本密阳46，贡献率分别为4.33%和462%。

关键词: 水稻, 叶片丙二醛含量