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当前位置: 首页 > 文章 > 杂交旱稻保持系沪旱1B柱头外露率的QTL定位 浙江农业学报 2009,21 (3) 241-245
Position: Home > Articles > Mapping of QTLs affecting stigma exsertion rate of Huhan 1B as a CMS maintainer of upland hybrid rice Acta Agriculturae Zhejiangensis 2009,21 (3) 241-245

杂交旱稻保持系沪旱1B柱头外露率的QTL定位

作  者：
岳高红;梅捍卫;潘彬荣;楼珏;李明寿;罗利军
单  位：
上海市农业生物基因中心;温州市农业科学院
关键词：
水稻;抗旱杂交稻;柱头外露率;QTL分析
摘  要：
本研究利用沪旱1B/Ⅱ-32B杂交的F2群体,对水稻的柱头外露率性状进行了QTL分析,研究其遗传机制,以改良沪旱1B的柱头外露率。试验共检测到10个与柱头外露率有关的QTLs,分布在4条染色体上,加性效应起主要作用。检测到3个影响单边柱头外露率(PSES)的QTLs,分别位于3号、7号和9号染色体上,联合贡献率为21.44%;检测到2个影响双边柱头外露率(PDES)的QTLs,位于3号和9号染色体上,联合贡献率为15.98%;检测到5个影响总柱头外露率(PES)的QTLs,位于3,4,7,9号染色体上,其中3号染色体上有2个QTLs位点,总柱头外露率QTLs的单独贡献率在6.86%~9.73%之间,联合贡献率为39.42%。QTL上位性分析,检测到7对显著互作位点,解释了表型变异的67.39%,检测到的上位性效应主要以加性/加性互作效应为主,部分主效QTLs参与了互作。这些QTLs分子标记为改良沪旱1B的柱头外露率性状进行分子标记辅助选择提供参考。
译  名：
Mapping of QTLs affecting stigma exsertion rate of Huhan 1B as a CMS maintainer of upland hybrid rice
作  者：
YUE Gao-hong1,MEI Han-Wei2,PAN Bin-rong1,LOU Jue2,LI Ming-shou2,LUO Li-jun2,*(1Crop Research Institute,Wenzhou Academy of Agricultural Sciences,Wenzhou 325006,China;2Shanghai Agrobiological Gene Center,Shanghai 201106,China)
关键词：
rice;drought tolerant hybrid rice;percentage of exserted stigma;QTL analysis
摘  要：
To clarify the genetic mechanism of percentage of stigma exsertion in rice(Oryza sativa L.) and improve stigma exsertion rate of a drought tolerant CMS maintainer Huhan 1B,QTL analysis was conducted in a F2 population of 190 plants derived from a cross between Huhan 1B and Ⅱ-32B.Ten QTLs of rice stigma exsertion rate were identified on four chromosomes.Three QTLs of percentage of single exserted stigma(PSES) were mapped on chromosomes 3、7 and 9 with accumulated contribution of 21.44%;Two QTLs of percentage of dual exserted stigma(PDES) were detected on chromosomes 3 and 9 with accumulated contribution of 15.98%; Five QTLs of percentage of total exserted stigma(PES) were mapped on chromosome 3,4,7,9,including 2 QTLs on chromosome 3,whose contribution rates varied from 6.86% to 9.73% and the total contribution rates of the five QTLs was 39.42%.Totally,seven QTLs pairs had significant epistatic effect on the percentage of stigma exsertion rate and accounted for 67.39% of the phenotypic variation.Most of them were additive×additive epistatic effects,and some of major QTLs were involved in the interactions.The identification of the QTLs markers may be important for improvement of Huhan 1B in stigma exsertion rate.

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