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茶陵野生稻导入系遗传分析及重要性状相关QTL鉴定
黄婧芬1,2, 康敏3, 殷勤3, 王艳艳2, 杨子怡2, 郑晓明2, 乔卫华2, 杨庆文2, 孙希平1
0
(1山西农业大学农学院,太谷 030801;2中国农业科学院作物科学研究所,北京 100081;3湖南省株洲市农业科学研究所,株洲 412007)
摘要:
普通野生稻是栽培稻的祖先种,从野生稻中挖掘栽培稻中已丢失或削弱了的优异基因是保证水稻高产稳产的一个 重要手段。本研究以茶陵野生稻染色体片段导入系群体为研究材料,使用均匀分布于 12 条水稻染色体上的 136 个多态性分子 标记,对其遗传背景进行检测。平均每个导入系携带 24 个导入片段,每个片段的遗传距离平均为 16.1cM,导入片段覆盖野 生稻基因组的 87.89%。结合 2 个环境中的性状调查,鉴定到与 6 个产量性状相关的 18 个 QTL,其中 6 号染色体上与粒宽有 关的 QTL 在两个环境中被连续检测到。除此之外,还鉴定到 5 个与发芽期耐冷有关的 QTL。
关键词:  茶陵野生稻  导入系  遗传分析  QTL定位  
DOI:10.13430/j.cnki.jpgr.20191011002
投稿时间:2019-10-11修订日期:2019-11-07
基金项目:国家自然科学基金(31471471)
Genetic Analysis of the Introgression Lines Derived From Chaling Wild Rice and Identification of Yield Related QTLs
HUANG Jing-fen1,2,KANG Min3,YIN Qin3,WANG Yan-yan2,YANG Zi-yi2,ZHENG Xiao-ming2, QIAO Wei-hua2,YANG Qing-wen2,SUN Xi-ping1
(1College of Agronomy, Shanxi Agricultual University, Taigu 030801; 2 Institute of CropSciences,Chinese Academy of Agricultural Sciences, Beijing 100081; Institute of Agriculture of Zhuzhou, Zhuzhou 412007)
Abstract:
Oryza rufipogon served as an important rice germplasm which harbors excellent yield and stress tolerance genes that have been lost or weakened in cultivated rice. Within this study, a set of introgression lines with chromosome segments derived from Chaling wild rice were used for genetic analysis and QTL identification. Two-hundred sixteen polymorphic markers evenly distributed across the 12 chromosomes were deployed for genotyping. 87.89% of the Chaling wild rice genomes were detected. Averagely, 24 introgression segments were found in each introgression line, and the genetic distance of each segment was accounting for about 16.1 cM. By taking use of phenotypic datasets from two environments, eighteen QTLs on six yield traits were identified. Especially, a QTL associating with grain width on chromosome 6 was found in two environments. Furthermore, five QTLs related to cold tolerance at the germination stage were detected. Taken together, these introgression lines served as elite gene resources with a potential for rice breeding.
Key words:  Chaling wild rice  introgression line  genetic analysis  QTL mapping

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