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当前位置: 首页 > 文章 > 水稻苗期耐高Cu~(2+)胁迫的QTL定位和上位性分析 植物营养与肥料学报 2006,12 (3) 352-357
Position: Home > Articles > Main and epistasis analysis of QTLs for tolerant to high Cu~(2+) stress at seedling stage of rice(Oryza Sativa L.) Journal of Plant Nutrition and Fertilizers 2006,12 (3) 352-357

水稻苗期耐高Cu~(2+)胁迫的QTL定位和上位性分析

作  者：
沈圣泉;庄杰云;舒庆尧;夏英武
单  位：
中国水稻研究所国家水稻改良中心;浙江大学农业与生物技术学院
关键词：
水稻;RIL群体;QTL定位;上位性效应;耐Cu2+胁迫
摘  要：
用珍汕97B/密阳46构建RIL群体及其遗传图谱,对其种子采用沙培法育苗和培养,试验设置2个高浓度(100 mg/L和200 mg/L)Cu2+胁迫处理,以处理20 d后的幼苗相对根长(%)和相对苗高(%)作为苗期耐Cu2+胁迫指标,并用于QTL定位分析。结果表明,试验共检测到苗期耐Cu2+胁迫的主效应QTL 4个,以相对根长为指标,检测到qRCC(r)6(100 mg/L)和qRCC(r)9(200 mg/L),以相对苗高为指标,也检测到qRCC(s)1-2(100 mg/L和200mg/L)和qRCC(r)6-1(200 mg/L),有效基因分散于双亲中。试验还检测到苗期耐Cu2+胁迫的上位性互作8对,以相对根长为指标时,检测到2对互作;以相对苗高为指标时,检测到6对上位性互作。表明水稻苗期耐高浓度Cu2+胁迫,其上位性互作也起到较为重要作用。
译  名：
Main and epistasis analysis of QTLs for tolerant to high Cu~(2+) stress at seedling stage of rice(Oryza Sativa L.)
作  者：
SHEN Sheng-quan~1,ZHUANG Jie-yun~2,SHU Qing-yao~1,XIA Ying-wu~1(1 College of Agriculture and Biotechnology,Zhejiang University,Hangzhou 310029,China;2 Chinese National Center for Rice Improvement,China National Rice Research Institute,Hangzhou 310006,China)
关键词：
rice;RIL population;QTLs mapping;main effect;epistasis effects;tolerant to high Cu~(2+) stress
摘  要：
The recombinant inbred line(RIL) populations derived from Zhenshan 97B/Miyang 46(ZS97B/MY46) and their genetic linkage maps were employed to map QTLs controlling tolerant to high Cu~(2+) stress at the seedling stage by culturing the seedling in two concentration of Cu~(2+)(100 mg/L and 200 mg/L) on the sand medium.After 20 days of treatment,the relative root length(%) and relative seedling height(%) was measured as index for tolerant to high Cu~(2+) stress.The results indicated that a total of four main effect QTLs were detected under high Cu~(2+) stress.Two were significant for the relative root length,qRCC(r)6(100 mg/L) andqRCC(r)9(200 mg/L),the other two were significant for relative seedling height,qRCC(s)1-2(100 mg/L and 200 mg/L) andqRCC(r)6-1(200mg/L).The positive allele were distributed in both the parents.A total of eight pairs of epistasis were detected for tolerant to high Cu~(2+) stress.Two were for relative root length;the other six for relative seedling height,indicating that epistasis were important genetic basis for the tolerant to high Cu~(2+) stress at the seedling stage.

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