中文摘要：

水稻（Oryza sativa L．）Waxy基因第一内含子＋1位G→T突变导致直链淀粉含量降低,针对该位点开发了鉴别两种不同Waxy基因型的标记，通过对143份水稻微核心种质材料进行检测，结果表明，该基因同时影响水稻直链淀粉舍量和胶稠度。其中G型等位基因直链淀粉含量平均值为22．53％，极显著高于T型的8．89％（P〈0．01），而G型材料胶稠度为52．11mm，极显著低于T型（88．33mm）（P〈0．01），并且直链淀粉含量和胶稠度在所有供试材料中表现出极显著负相关（相关系数-0．816，P〈0．01），因此，Waxy基因同时影响水稻直链淀粉含量与胶稠度两个品质相关性状．在改良稻米品质的分子育种中将具有重要的应用价值．

英文摘要：

The base substitution （G→T） at ＋1 loci of the first intron of Waxy gene resulted in the decrease of AC. Identification marker targeted at this SNP loci site of these two different Waxy allele were developed . Results of 143 rice mini-core collections showed that Waxy gene affected amylose content （AC） and gel consistency （GC） simultaneously. The average AC was 22.53% for G-type allele which was significantly higher than that of T-type allele （8.89%）. Its GC was significantly lower than that of T-type allele with （52.11 mm and 88.33 mm, respectively）. AC was significantly negatively correlated with GC （correlation=-0.816, P〈0.01）. Waxy gene affected grain quality traits AC and GC, having significant application in rice molecular breeding.