| 水稻光合作用及相关生理性状的QTL分析 |
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| 引用本文： | 胡茂龙,张迎信,孔令娜,杨权海,王春明,翟虎渠,万建民.水稻光合作用及相关生理性状的QTL分析[J].作物学报,2007,33(2):183-188. |
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| 作者姓名： | 胡茂龙 张迎信 孔令娜 杨权海 王春明 翟虎渠 万建民 |
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| 作者单位： | 1 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；2 中国农业科学院，北京 100081 |
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| 基金项目： | 国家高技术研究发展计划(863计划);江苏省自然科学基金 |
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| 摘 要： | 为了探讨光合作用及相关生理性状的遗传规律，利用由籼稻品种IR24 和粳稻品种Asominori杂交衍生的65个染色体片段置换系（Chromosome Segment Substitution Lines, CSSL）为材料，研究了水稻光合作用及相关生理性状的QTL。在水稻抽穗后7 d测定叶片光合速率（Pn）、蒸腾速率（Gs）、气孔导度（Tr）、细胞间隙CO2浓度（Ci）、叶绿素含量（CHL）、全氮含量（TLN）。共检测到10个QTLs，分布于第1、3、4、5、7、8和10染色体上，LOD值在2.77~8.42之间，贡献率为9.5%~46.5%。其中仅有控制气孔导度的qGs-8 与控制叶绿素含量的qCHL-8以及第10染色体上控制气孔导度的qGs-10与控制细胞间隙CO2浓度的qCi-10位置相同，分别位于第8染色体上标记R727和第10染色体上标记C1166附近。其他QTL在染色体上的位置不同，暗示了水稻光合功能遗传规律的复杂性。
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| 关 键 词： | 叶绿素 光合作用 水稻 数量性状基因座（QTL） 全氮含量 |
| 收稿时间： | 2006-04-10 |
| 修稿时间： | 2006-07-04 |
Quantitative Trait Locus for Photosynthesis and Its Related Physiological Traits in Rice (Oryza sativa L.) |
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| HU Mao-Long,ZHANG Ying-Xin,KONG Ling-Na,YANG Quan-Hai,WANG Chun-Ming,ZHAI Hu-Qu,WAN Jian-Min.Quantitative Trait Locus for Photosynthesis and Its Related Physiological Traits in Rice (Oryza sativa L.)[J].Acta Agronomica Sinica,2007,33(2):183-188. |
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| Authors: | HU Mao-Long ZHANG Ying-Xin KONG Ling-Na YANG Quan-Hai WANG Chun-Ming ZHAI Hu-Qu WAN Jian-Min |
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| Institution: | 1.National Key Laboratory for Crop Genetics & Germplasm Enhancement, Jiangsu Plant Gene Engineering Research Center, Nanjing Agricultural University, Nanjing 210095, Jiangsu；2 Chinese Academy of Agricultural Sciences, Beijing 100081, China |
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| Abstract: | In order to explore the genetic basis for photosynthesis and its related physiological traits, sixty-five chromosome segment substitution lines (CSSLs), derived from a cross between an indica cultivar IR24 and a japonica cultivar Asominori of rice (Oryza sativa L.), were utilized for mapping quantitative trait loci (QTL) for photosynthetic and its related physiological traits. Net photosynthesis (Pn), stomatal conductance (Gs), transpiration rate (Tr), intercellular CO2 concentration (Ci), leaf chlorophyll (CHL), and total leaf nitrogen content (TLN) in flag leaves were measured at heading stage. The CSSLs showed transgressive segregation for many of the traits, and significant correlations were observed for most of the traits. In total, ten QTLs were detected on chromosomes 1, 3, 4, 5, 7, 8, and 10 with a range of percentages of variance explained (PVE) from 9.5% to 46.5%. LOD scores of these QTLs ranged from 2.77 to 8.42. A consistent location was mapped for a QTL controlling stomatal conductance (qGs-8) and leaf chlorophyll concentration (qCHL-8) in the vicinity of R727 on chromosome 8 and for a QTL controlling stomatal conductance (qGs-10) and intercellular CO2 concentration (qCi-10) in the vicinity of C1166 on chromosome 10. No other overlapping loci associated with different traits were detected. These results indicated that the genetic mechanism of photosynthesis was complex in rice. |
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| Keywords: | Chlorophyll Photosynthesis Rice (Oryza sativa L ) Quantitative trait loci (QTLs) Total leaf nitrogen content (TLN) |
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