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QTLs for effective silique number of main inflorescence on rapeseed(Brassica napus L.)

SUN Mei-yu,HUA Wei,LIU Jing,WANG Xin-fa,LIU Gui-hua,WANG Han-zhong*(Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences,Key Laboratory of Biology and Genetic Improvement of Oil Crops,Ministry of Agriculture,Wuhan 430062,China)  
Effective silique number on main inflorescence is an important factor on rapeseed(Brassica napus L.) yield.Doubled haploids(DH) derived from ZY036 and 51070 were used to develop genetic markers on effective silique number.DH population was planted for 3 years at 4 locations as Wuhan-2010,Yangluo-2011,Qinghai-2011,Yangluo-2012 and Xiangyang-2012 respectively.In the 5 field trials,QTLs for the effective silique number on main inflorescence were identified using WinQTL Cartographer 2.5 software.10 QTLs were found.Their phenotypic variation,LOD value and additive effect ranged from 9.33% to 31.60%,2.51 to 5.37 and 2.71 to 8.09 respectively.Four QTLs on chromosomes A1,A5,C1 and C9 were co-localized by 2 trials.In the QTL regions,16 linkage markers were obtained,and 8 of 16 markers had less than 1cM distance from the peak of the QTLs.
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