Resequencing-based QTL mapping for yield and resistance traits reveals great potential of Oryza longistaminata in rice breeding  

作　　者：Weixiong Long Nengwu Li Jie Jin Jie Wang Dong Dan Fengfeng Fan Zhiyong Gao Shaoqing Li 

机构地区：[1]State Key Laboratory of Hybrid Rice,Key Laboratory for Research and Utilization of Heterosis in Indica Rice of Ministry of Agriculture,Engineering Research Center for Plant Biotechnology and Germplasm Utilization of Ministry of Education,College of Life Sciences,Wuhan University,Wuhan 430072,Hubei,China [2]Hongshan Laboratory of Hubei Province,Wuhan 430072,Hubei,China

出　　处：《The Crop Journal》2023年第5期1541-1549,共9页作物学报（英文版）

基　　金：partly granted from the National Natural Science Foundation of China(U20A2023, 31870322);the Creative Research Groups of the Natural Science Foundation of Hubei Province,China (2020CFA009);the Hubei Hongshan Laboratory (2021hszd010)。

摘　　要：As a natural genetic reservoir, wild rice contains many favorable alleles and mutations conferring high yield and resistance to biotic and abiotic stresses. However, there are few reports describing favorable genes or QTL from the AA genome wild rice O. longistaminata, which is characterized by tall and robust habit and long tassels and anthers and shows high potential for use in cultivated rice improvement. We constructed a stable BC_(2)F_(20) backcross inbred line(BIL) population of 152 lines from the cross of 9311 × O.longistaminat. Some BILs showed large panicles, large seeds, and strong resistance to rice false smut, bacterial leaf blight, rice blast spot, and brown planthopper. Genomic resequencing showed that the 152 BILs covered about 99.6% of the O. longistaminata genome. QTL mapping with 2432 bin markers revealed 13QTL associated with seven yield traits and eight with resistance to brown planthopper and to four diseases. Of these QTL, 12 for grain yield and 11 for pest and disease resistance are novel in Oryza species.A large-panicle NIL1880 line containing QTL qPB8.1 showed a nearly 50% increase in spikelet number and27.5% in grain yield compared to the recurrent parent 9311. These findings support the potential value of O. longistaminata for cultivated rice improvement.

关 键 词：Oryza longistaminata High yield High disease and pest resistance QTL 

分 类 号：S511[农业科学—作物学]