Genetic analysis and QTL mapping of a novel reduced height gene in common wheat (Triticum aestivum L.)  

作　　者：ZHOU Chun-yun XIONG Hong-chun LI Yu-ting GUO Hui-jun XIE Yong-dun ZHAO Lin-shu GU Jia-yu ZHAO Shi-rong DING Yu-ping SONG Xi-yun LIU Lu-xiang 

机构地区：[1]School of Life Sciences,Qingdao Agricultural University,Qingdao 266109,P.R.China [2]Institute of Crop Sciences,Chinese Academy of Agricultural Sciences/National Engineering Laboratory for Crop Molecular Breeding/National Center of Space Mutagenesis for Crop Improvement,Beijing 100081,P.R.China

出　　处：《Journal of Integrative Agriculture》2020年第7期1721-1730,共10页农业科学学报（英文版）

基　　金：This work was financially supported by the National Key Research and Development Program of China(2016YFD0102100 and 2016YFD0101802);the National Natural Science Foundation of China(31801346);the earmarked fund for China Agriculture Research System(CARS-03).

摘　　要：Low stature in wheat is closely associated with lodging resistance,and this impacts harvest index and grain yield.The discovery of novel dwarfing or semi-dwarfing genes can have great significance for dwarf wheat breeding.In this study,we identified an EMS induced dwarf wheat mutant JE0124 from the elite cultivar Jing411.JE0124 possesses increased stem strength and a 33%reduction in plant height compared with wild type.Giberelic acid(GA)treatment analysis suggested that JE0124 was GA-sensitive.Analysis of the frequency distribution of plant height in four F,populations derived from crosses between JE0124 and the relatively taller varieties Nongda 5181 and WT indicated that the dwarfism phenotype was quantitatively inherited.We used two F,populations and 312 individuals from the reciprocal cross of Nongda 5181 and JE0124 to map the quantitative trait locus(QTL)for reduced height to a 0.85-cM interval on chromosome 2DL.The mapping was done by using a combination of 660K SNP array-based bulked segregant analysis(BSA)and genetic linkage analysis,with logarithm of odds(LOD)scores of 5.34 and 5.78,respectively.Additionally,this QTL accounted for 8.27-8.52%of the variation in the phenotype.The dwarf mutant JE0124 and the newly discovered dwarfing gene on chromosome 2DL in this study will enrich genetic resources for dwarf wheat breeding.

关 键 词：reduced height gene wheat QTL BSA molecular marker 

分 类 号：S512.1[农业科学—作物学]