title: Fine mapping of Restorer-of-fertility in pepper (Capsicum annuum L.) identified a candidate gene encoding a pentatricopeptide repeat (PPR)-containing protein.
abstract: Using fine mapping techniques, the genomic region co-segregating with Restorer - of - fertility ( Rf ) in pepper was delimited to a region of 821 kb in length. A PPR gene in this region, CaPPR6 , was identified as a strong candidate for Rf based on expression pattern and characteristics of encoding sequence. Cytoplasmic-genic male sterility (CGMS) has been used for the efficient production of hybrid seeds in peppers (Capsicum annuum L.). Although the mitochondrial candidate genes that might be responsible for cytoplasmic male sterility (CMS) have been identified, the nuclear Restorer-of-fertility (Rf) gene has not been isolated. To identify the genomic region co-segregating with Rf in pepper, we performed fine mapping using an Rf-segregating population consisting of 1068 F2 individuals, based on BSA-AFLP and a comparative mapping approach. Through six cycles of chromosome walking, the co-segregating region harboring the Rf locus was delimited to be within 821 kb of sequence. Prediction of expressed genes in this region based on transcription analysis revealed four candidate genes. Among these, CaPPR6 encodes a pentatricopeptide repeat (PPR) protein with PPR motifs that are repeated 14 times. Characterization of the CaPPR6 protein sequence, based on alignment with other homologs, showed that CaPPR6 is a typical Rf-like (RFL) gene reported to have undergone diversifying selection during evolution. A marker developed from a sequence near CaPPR6 showed a higher prediction rate of the Rf phenotype than those of previously developed markers when applied to a panel of breeding lines of diverse origin. These results suggest that CaPPR6 is a strong candidate for the Rf gene in pepper.
authors.affiliation: Department of Plant Science, Plant Genomics and Breeding Institute, and Research Institute for Agriculture and Life Sciences, Seoul National University, 599 Gwanak-ro, Gwank-gu, Seoul, 151-921, Korea.|Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup, 580-185, Republic of Korea.
authors.forename: Yeong Deuk
authors.initials: YD
authors.lastname: Jo
authors.affiliation: Department of Plant Science, Plant Genomics and Breeding Institute, and Research Institute for Agriculture and Life Sciences, Seoul National University, 599 Gwanak-ro, Gwank-gu, Seoul, 151-921, Korea.
authors.forename: Yeaseong
authors.initials: Y
authors.lastname: Ha
authors.affiliation: Department of Plant Science, Plant Genomics and Breeding Institute, and Research Institute for Agriculture and Life Sciences, Seoul National University, 599 Gwanak-ro, Gwank-gu, Seoul, 151-921, Korea.
authors.forename: Joung-Ho
authors.initials: JH
authors.lastname: Lee
authors.affiliation: Department of Plant Science, Plant Genomics and Breeding Institute, and Research Institute for Agriculture and Life Sciences, Seoul National University, 599 Gwanak-ro, Gwank-gu, Seoul, 151-921, Korea.
authors.forename: Minkyu
authors.initials: M
authors.lastname: Park
authors.affiliation: Keygene N.V., Wageningen 216, The Netherlands.
authors.forename: Alex C
authors.initials: AC
authors.lastname: Bergsma
authors.affiliation: Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup, 580-185, Republic of Korea.
authors.forename: Hong-Il
authors.initials: HI
authors.lastname: Choi
authors.affiliation: Keygene N.V., Wageningen 216, The Netherlands.
authors.forename: Sandra
authors.initials: S
authors.lastname: Goritschnig
authors.affiliation: Keygene N.V., Wageningen 216, The Netherlands.
authors.forename: Bjorn
authors.initials: B
authors.lastname: Kloosterman
authors.affiliation: Keygene N.V., Wageningen 216, The Netherlands.
authors.forename: Peter J
authors.initials: PJ
authors.lastname: van Dijk
authors.affiliation: Department of Plant Science, Plant Genomics and Breeding Institute, and Research Institute for Agriculture and Life Sciences, Seoul National University, 599 Gwanak-ro, Gwank-gu, Seoul, 151-921, Korea.
authors.forename: Doil
authors.initials: D
authors.lastname: Choi
authors.affiliation: Department of Plant Science, Plant Genomics and Breeding Institute, and Research Institute for Agriculture and Life Sciences, Seoul National University, 599 Gwanak-ro, Gwank-gu, Seoul, 151-921, Korea. bk54@snu.ac.kr.
authors.forename: Byoung-Cheorl
authors.initials: BC
authors.lastname: Kang
mesh_terms: D000595:Amino Acid Sequence; D054458:Amplified Fragment Length Polymorphism Analysis; D002212:Capsicum / Q000235:genetics*; D016386:Chromosome Walking; D005298:Fertility / Q000235:genetics*; D017343:Genes, Plant; D005819:Genetic Markers; D010641:Phenotype; D051479:Plant Infertility / Q000235:genetics*; D010940:Plant Proteins / Q000235:genetics; D016415:Sequence Alignment
chemical_list: D005819:Genetic Markers; D010940:Plant Proteins