| 基于SNP标记的玉米株高及穗位高QTL定位 |
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| 引用本文： | 郑德波,杨小红,李建生,严建兵,张士龙,贺正华,黄益勤.基于SNP标记的玉米株高及穗位高QTL定位[J].作物学报,2013,39(3):549-556. |
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| 作者姓名： | 郑德波 杨小红 李建生 严建兵 张士龙 贺正华 黄益勤 |
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| 作者单位： | 1 广西大学农学院，广西南宁530005；2 中国农业大学国家玉米改良中心，北京100193；3 华中农业大学作物遗传改良国家重点实验室，湖北武汉430070；4 湖北省农业科学院粮食作物研究所，湖北武汉430071；5 广西农业科学院玉米研究所，广西南宁530227 |
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| 基金项目： | 本研究由国家高技术研究发展计划(863计划)项目(2010AA10A106)和湖北省农业科技创新中心项目资助。 |
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| 摘 要： | 为进一步弄清玉米株高和穗位高的遗传机理，为育种生产提供服务，本研究以K22×CI7、K22×Dan3402个F2群体为作图群体，利用覆盖玉米10条染色体的SNP标记构建了2个连锁图谱。并将这2个F2群体衍生的分别含237和218个家系的F2:3群体用于田间性状的鉴定。用复合区间作图模型对2个群体的株高、穗位高表型进行QTL定位分析，结果显示，在武汉和南宁两种环境条件下共定位到21个株高QTL和27个穗位高QTL；单个QTL表型变异贡献率的变幅为4.9%~17.9%；株高和穗位高QTL的作用方式以加性和部分显性为主；第7染色体上可能存在控制株高和穗位高的主效QTL。
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| 关 键 词： | SNP 数量性状位点(QTL) 连锁图谱 株高 穗位高 玉米 |
| 收稿时间： | 2012-07-23 |
QTL Identification for Plant Height and Ear Height Based on SNP Mapping in Maize (Zea mays L.) |
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| ZHENG De-Bo,YANG Xiao-Hong,LI Jian-Sheng,YAN Jian-Bing,ZHANG Shi-Long,HE Zheng-Hua,HUANG Yi-Qin.QTL Identification for Plant Height and Ear Height Based on SNP Mapping in Maize (Zea mays L.)[J].Acta Agronomica Sinica,2013,39(3):549-556. |
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| Authors: | ZHENG De-Bo YANG Xiao-Hong LI Jian-Sheng YAN Jian-Bing ZHANG Shi-Long HE Zheng-Hua HUANG Yi-Qin |
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| Institution: | 1.College of Agronomy, Guangxi University, Nanning 530005, China;2.National Maize Improvement Center of China, China Agricultural University, Beijing 100193, China;3.National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China;4.Food Crops Institute, Hubei Academy of Agricultural Sciences, Wuhan 430064, China;5.Maize Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530227, China? |
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| Abstract: | In order to learn more about the genetic machanism of plant height and ear height, two linkage maps were constructed by SNP markers using two F2:3 families derived from K22 × CI7 and K22 × Dan340 respectively. These two maps included 429 and 344 polymorphic SNP markers respectively and their total lengths were 1 389.3 cM and 1 567.5 cM respectively. The phenotypic data of plant height (PH) and ear height (EH) of two populations were used to detect QTLs in two environments (2010 in Nanning and 2011 in Wuhan) by using the Composite Interval Mapping (CIM) model of WinQTLCart2.5. In total, 21 QTLs for plant height and 27 QTLs for ear height were identified. The phenotypic variance explained by each QTL ranged from 4.9% to 17.9%. The results showed that the additive and partial dominant effects were the main genetic basis for plant height and ear height in maize in this study, and the main QTLs for PH and EH were both found on chromosome 7. |
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| Keywords: | SNP (single nucleotide polymorphism) QTL (quantitative trait locus) Linkage map Plant height Ear height Zea mays |
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