Selection footprints reflect genomic changes associated with breeding efforts in 56 cucumber inbred lines  

作　　者：Bin Liu Dailu Guan Xuling Zhai Sen Yang Shudan Xue Shuying Chen Jing Huang Huazhong Ren Xingwang Liu 

机构地区：[1]Beijing Key Laboratory of Growth and Developmental Regulation for Protected Vegetable Crops,College of Horticulture,China Agricultural University,Beijing 100193,P.R.China [2]Centre for Research in Agricultural Genomics(CRAG),CSIC-IRTA-UAB-UB,Campus Universitat Autònoma de Barcelona,Bellaterra 08193,Spain [3]Department of Agronomy,College of Agriculture,Purdue University,West Lafayette,IN 47907,USA

出　　处：《Horticulture Research》2019年第1期145-153,共9页园艺研究（英文）

基　　金：supported by the National Key Research and Development Program of China(2018YFD1000800);the National Natural Science Foundation of China(31830080);the Beijing Municipal Natural Science Foundation(6184043);the Project of Beijing Agricultural Innovation Consortium(BAIC01).

摘　　要：Cucumber selective breeding over recent decades has dramatically increased productivity and quality,but the genomic characterizations and changes associated with this breeding history remain unclear.Here,we analyzed the genome resequencing data of 56 artificially selected cucumber inbred lines that exhibit various phenotypes to detect trait-associated sequence variations that reflect breeding improvement.We found that the 56 cucumber lines could be assigned to group 1 and group 2,and the two groups formed a distinctive genetic structure due to the breeding history involving hybridization and selection.Differentially selected regions were identified between group 1 and group 2,with implications for genomic-selection breeding signatures.These regions included known quantitative trait loci or genes that were reported to be associated with agronomic traits.Our results advance knowledge of cucumber genomics,and the 56 selected inbred lines could be good germplasm resources for breeding.

关 键 词：BREEDING GERMPLASM signature 

分 类 号：S64[农业科学—蔬菜学]