| 利用重组自交群体检测水稻抗亚铁毒胁迫的QTLs |
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| 引用本文： | 万建林,翟虎渠,万建民,安井秀,吉村醇.利用重组自交群体检测水稻抗亚铁毒胁迫的QTLs[J].作物学报,2004,30(4):329-333. |
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| 作者姓名： | 万建林 翟虎渠 万建民 安井秀 吉村醇 |
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| 作者单位： | 南京农业大学作物遗传与种质创新国家重点实验室，江苏省植物基因工程研究中心，江苏南京 210095 |
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| 基金项目： | National Science Fund for Distinguished Young Scholars Abroad，引进国际先进农业科技计划(948计划) |
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| 摘 要： | 潜育性水稻田广泛分布于中国、斯里兰卡、印度、印度尼西亚、塞拉里昂、利比亚、尼日利亚、哥伦比亚和菲律宾等国，其中我国南方稻区就有670万公顷低产潜育性水稻田。该类水稻田还原性强，矿质营养失调，尤以Fe2+ 过量积累，对水稻生长发育产生不良的逆境胁迫作用。培育抗亚铁毒的水稻品种是简便、经济有效地提高稻谷产量的重
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| 关 键 词： | 水稻 抗亚铁毒 重组自交（ RILs ）群体 数量性状位点 ( QTL s) |
| 收稿时间： | 2002-12-02 |
| 修稿时间： | 2003-04-10 |
Detection and Analysis of QTLs Associated with Resistance to Ferrous Iron Toxicity in Rice (Oryza sativa L.),Using Recombinant Inbred Lines |
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| Abstract.Detection and Analysis of QTLs Associated with Resistance to Ferrous Iron Toxicity in Rice (Oryza sativa L.),Using Recombinant Inbred Lines[J].Acta Agronomica Sinica,2004,30(4):329-333. |
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| Authors: | Abstract |
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| Institution: | State Key laboratory of crop genetics & germplasm enhancement , Jiangsu Plant Gene Engineering Research Center , Nanjing Agricultural University, Nanjing 210095 |
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| Abstract: | A mapping population of 81 F 11 lines (recombinant inbred lines: RILs), derived from a cross between a japonica variety Kinmaze and an indica variety DV85 by the single seed descent methods, was used to detect quantitative trait loci (QTLs) for leaf bronzing index (LBI) and plant height (PH) under Fe 2 stress condition. Two parents and 81 RILs were phenotyped for the traits by growing them in Fe 2 toxicity nutrient solution. A total of three QTLs were detected on chromosome 3, with score LOD ranging from 3.79 to 5.89. Two QTLs controlling LBI was located at the region of X279 C25 and X144 X362 , and their contributions to total variation were 17.38 % and 22.07%, respectively. One QTL for PH was located at the region of R1468A R1468B, with contribution rate 23.18%. Comparing with the other mapping results, the QTL for LBI located at the region of X279 C25 on chromosome 3 was identical with the QTL for chlorophyll content on a rice function map. Another QTL for LBI located at the region of X144 X362 linked with QTL for chlorophyll content which located at the region of C136 C944 on a rice function map, the genetic distance between the two QTLs was 25.6 cM . The results indicated that ferrous iron toxicity of rice was characterized by bronzing spots on the lower leaves, which spread over the whole leaves, causing the lower leaves to turn dark gray and producing chlorophyll catabolites or derivatives which reduced cytotoxicity of some heavy metals, such as ferrous iron. |
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| Keywords: | Rice (Oryza sativa L ) Resistance to ferrous iron toxicity Recombinant inbred lines (RILs) population Quantitative trait loci (QTLs) |
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