Construction of high-density genetic linkage map of Pyropia yezoensis(Bangiales,Rhodophyta)and identifi cation of red color trait QTLs in the thalli  

作　　者：Lu WANG Kuipeng XU Xianghai TANG Junhao WANG Fanna KONG Yunxiang MAO 

机构地区：[1]Key Laboratory of Marine Genetics and Breeding(Ministry of Education),College of Marine Life Sciences,Ocean University of China,Qingdao 266003,China [2]Key Laboratory of Utilization and Conservation of Tropical Marine Bioresource(Ministry of Education),College of Fisheries and Life Science,Hainan Tropical Ocean University,Sanya 572022,China [3]Marine Biology and Biotechnology Laboratory,Pilot National Laboratory for Marine Science and Technology(Qingdao),Qingdao 266071,China

出　　处：《Journal of Oceanology and Limnology》2021年第3期1103-1117,共15页海洋湖沼学报（英文）

基　　金：Supported by the National Natural Science Foundation of China(Nos.41976146,31672641);the Marine S&T Fund of Shandong Province for Pilot National Laboratory for Marine Science and Technology(Qingdao)(No.2018SDKJ0302-4);the National Key R&D Program of China(No.2018YFD0900106);the Shandong Province Key Research and Development Program(No.2019GHY112008)。

摘　　要：Pyropia yezoensis is an important macroalga because of its extensive global distribution and economic importance.Color is an important trait in the thalli of P.yezoensis,it is also an effective marker to identify the hybridization in genetic breeding.In this study,a high-density genetic linkage map was constructed based on high-throughput single nucleotide polymorphism(SNP)markers,and used for analyzing the quantitative trait loci(QTLs)of red color trait in the thalli of P.yezoensis.The conchospore undergoes meiosis to develop into an ordered tetrad,and each cell has a haploid phenotype and can grow into a single individual.Based on this theory,F1 haploid population was used as the mapping population.The map included 531 SNP markers,394.57 cM long on average distance of 0.74 cM.Collinear analysis of the genetic linkage map and the physical map indicated that the coverage between the two maps was 79.42%.Furthermore,QTL mapping identified six QTLs for the chromosomal regions associated with the red color trait of the thalli.The value of phenotypic variance explained(PVE)by an individual QTL ranged from 4.71%-63.11%.And QTL qRed-1-1,with a PVE of 63.11%,was considered the major QTL.Thus,these data may provide a platform for gene and QTL fine mapping,and marker-assisted breeding in P.yezoensis in the future.

关 键 词：Pyropia yezoensis high-density genetic linkage map quantitative trait loci(QTL)mapping F1 haploid population red pigment variant 

分 类 号：S917.3[农业科学—水产科学]