| 水稻苗期耐淹相关性状QTL分析 |
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| 引用本文： | 张光恒,曾大力,胡时开,苏岩,阿加拉铁,郭龙彪,钱前.水稻苗期耐淹相关性状QTL分析[J].作物学报,2006,32(9):1280-1286. |
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| 作者姓名： | 张光恒 曾大力 胡时开 苏岩 阿加拉铁 郭龙彪 钱前 |
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| 作者单位： | 1中国水稻研究所水稻生物学国家重点实验室，浙江杭州310006；2中国农业科学院研究生院，北京100081；3长江大学农学系，湖北荆州434023 |
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| 基金项目： | 国家自然科学基金;国家自然科学基金 |
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| 摘 要： | 以相同淹水条件下存活率差异较大的籼稻TN1与粳稻春江06(CJ06)为亲本构建的DH群体为试材，考察了DH群体及其双亲与苗期耐淹相关的5个性状，各性状均表现为连续分布，且都存在一定数量的双向超亲遗传类型，受多基因控制。使用分子连锁图谱进行QTL分析，共检测到16个与苗期耐淹有关的QTL，包括4个中胚轴长度QTL、3个株高QTL、3
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| 关 键 词： | 水稻 加倍单倍体(DH)群体 数量性状基因座(QTL) 耐淹 |
| 收稿时间： | 2005-11-08 |
| 修稿时间： | 2006-02-04 |
QTL Analysis of Traits Concerned Submergence Tolerance at Seedling Stage in Rice (Oryza sativa L.) |
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| ZHANG Guang-Heng,ZENG Da-Li,HU Shi-Kai,SU Yan,A-JIA La-Tie,GUO Long-Biao,QIAN Qian.QTL Analysis of Traits Concerned Submergence Tolerance at Seedling Stage in Rice (Oryza sativa L.)[J].Acta Agronomica Sinica,2006,32(9):1280-1286. |
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| Authors: | ZHANG Guang-Heng ZENG Da-Li HU Shi-Kai SU Yan A-JIA La-Tie GUO Long-Biao QIAN Qian |
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| Institution: | 1.State Key Laboratory for Rice Biology, China Rice Research Institute, Hangzhou, 310006, Zhejiang;2.Graduate School of Chinese Academy of Agricultural Sciences, Beijing 100081;3.Agriculture Department of Yangtze University, Jingzhou 434023, Hubei, China |
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| Abstract: | Flash flooding is one of the most severe natural disasters in the world.Submergence of rice seedling is a common problem for rice farmers.It severely reduces grain yield and increases the unpredictability of cropping.In generally,submergence tolerance is defined as the ability of a rice plant to surviving and continue growing after being completely submerged in water for several days.Rice plants are less tolerant of submergence at the early growth stages.Submergence tolerance is controlled by multi-genes with major effects,and minor modifiers.Therefore,it is important to find molecular markers associated with submergence tolerant,and be used in rice breeding by marker-assisted selection(MAS).QTLs for 5 traits related to submergence tolerance,including length of mesocotyl(LM),plant height(PH),livability(L),damage index of chlorophyll(DIOC) and relative damage percent of dry weight(RDP),were investigated using a population of DH lines derived from a cross between TN1 and CJ06,which have different tolerances to submergence.Transgressive segregations for the 5 traits were observed in the population,and their frequencies were approximately normal distributions.Generally,16 QTLs for submergence tolerance at seedling stage in rice were detected on chromosomes 1,2,3,4,6,8,9,11 and 12,including 4 QTLs for LOE,3 QTLs for PH,3 QTLs for L,3 QTLs for DIOC and 3 QTLs for RDP,respectively.LODs of the QTLs related to submergence tolerance at seedling stage in rice varied from 2.26 to 4.64.Three QTLs(qL-4,qL-8 and qL-9) for livability were detected on chromosomes 4,8 and 9,their LOD values were 3.10,3.02 and 3.78,and their contributions were 17.2%,14.3% and 41.1%,respectively.The regions of RM3412RM6716 was detected simultaneously for affecting plant height and relative damage percent of dry weight.It is indicated that there is close genetic correlation between plant height and relative damage percent of dry weight under submergence tolerance at seedling stage in rice,suggesting that the trait of submergence is controlled by many genes in rice.These finding establish the foundations of marker-assisted selection and gene cloning of submergence tolerance of rice. |
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| Keywords: | Rice(Oryza sativa L ) Doubled haploid lines(DH) Quantitative trait loci(QTL) Submergence tolerance |
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