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| QTL Mapping Analysis of Powdery Mildew Resistance in Pepper |
| BAI Rui-qin，ZHANG Zheng-hai，CAO Ya-cong，YU Hai-long，ZHU Yan-shu，LIU Jing，ZHANG Nan-nan，WANG Li-hao，ZHANG Bao-xi* |
| Institute of Vegetables & Flowers，Chinese Academy of Agricultural Sciences，Beijing 100081，China |
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Abstract Taking 142 recombinant inbred lines（‘H3’ב83-60’）F8 group developed by crossing
powdery mildew resistant parental line ‘H3’（Capsicum annuum） and susceptive parental line ‘83-60’
（C.annuum）as studying material，and based on KASPar primer developed by re-sequencing data of parental
lines，this paper constructed pepper genetic linkage map including 16 linkage groups．The total map distance
was 1 356.5 cM，with an average distance of 4.69 cM between adjacent markers．Based on the phenotypic
data of recombinant inbred lines in 2016 and 2017，5 QTLs naming PMR6.1，PMR9.1，PMR11.1，PMR11.2
and PMR5.1 resistant to powdery mildew were detected．Among them，PMR6.1 and PMR9.1 were detected
in these 2 years．The phenotypic contribution rate was between 10.8%-21.4%．This study developed the SNP
molecular marker chain-operated with powdery mildew resistance gene was of important reference value for
pepper disease resistance assistant breeding．
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Received: 08 April 2019
Published: 03 June 2019
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