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[CB-0004] Assembly of chromosome-level genome to accelerate octoploid strawberry breeding
Koeun Han(Koeun Han),Sun Yi Lee(Sun Yi Lee),Jinhee Kim(Jinhee Kim),Hye-Eun Lee(Hye-Eun Lee),Jinkwan Jo(Jinkwan Jo),Eun Su Lee(Eun Su Lee),Byoung-Cheorl Kang(Byoung-Cheorl Kang),Do-Sun Kim(Do-Sun Kim) 한국육종학회 2022 한국육종학회 공동학술발표집 Vol.2022 No.-
Genotyping-by-sequencing (GBS) for assessment of genetic diversity in pepper germplasm
Koeun Han,Heayoung Lee,Jin-Kyung Kwon,Byoung-Cheorl Kang 한국육종학회 2015 한국육종학회 심포지엄 Vol.2015 No.07
Pepper (Capsicum spp.) germplasm shows diverse phenotypic variations including fruit size, color, pungency, and many other horticultural traits. Traditional markers including SSR, AFLP, and RFLP have been used to construct genetic maps using biparental populations. However to assess the genetic diversity of large number of germplasm, a robust and rapid marker development and genotyping approach is needed. We used six pepper accessions including C. annuum, C. chinense, C. baccatum and C. frutescens and performed genotyping-by-sequencing (GBS). To select the most appropriate condition, eight different 2 bp selective nucleotides were used to make GBS libraries. Selective nucleotide ‘OO’ showed the largest number of reads in all samples, and 11,026 to 47,957 high-quality SNPs were called in six accessions. When C. annuum ‘CM334’ genome sequence was used as a reference, C. annuum showed the smallest number of SNPs, while C. baccatum which was known to be a different Capsicum clade showed the largest number of SNPs. Pepper core collection chosen to represent the genetic diversity of whole germplasm will be genotyped by high-density SNPs developed from GBS. We will perform genome-wide association study (GWAS) using genetic and phenotypic variation to identify the functional genetic loci controlling horticultural traits.