title: High-density genetic map construction and identification of a locus controlling weeping trait in an ornamental woody plant (Prunus mume Sieb. et Zucc).
abstract: High-density genetic map is a valuable tool for fine mapping locus controlling a specific trait especially for perennial woody plants. In this study, we firstly constructed a high-density genetic map of mei (Prunus mume) using SLAF markers, developed by specific locus amplified fragment sequencing (SLAF-seq). The linkage map contains 8,007 markers, with a mean marker distance of 0.195 cM, making it the densest genetic map for the genus Prunus. Though weeping trees are used worldwide as landscape plants, little is known about weeping controlling gene(s) (Pl). To test the utility of the high-density genetic map, we did fine-scale mapping of this important ornamental trait. In total, three statistic methods were performed progressively based on the result of inheritance analysis. Quantitative trait loci (QTL) analysis initially revealed that a locus on linkage group 7 was strongly responsible for weeping trait. Mutmap-like strategy and extreme linkage analysis were then applied to fine map this locus within 1.14 cM. Bioinformatics analysis of the locus identified some candidate genes. The successful localization of weeping trait strongly indicates that the high-density map constructed using SLAF markers is a worthy reference for mapping important traits for woody plants.
authors.affiliation: Beijing Key Laboratory of Ornamental Plants Germplasm Innovation and Molecular Breeding, National Engineering Research Center for Floriculture, Beijing Laboratory of Urban and Rural Ecological Environment, College of Landscape Architecture, Beijing Forestry University, Beijing 100083, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Beijing Key Laboratory of Ornamental Plants Germplasm Innovation and Molecular Breeding, National Engineering Research Center for Floriculture, Beijing Laboratory of Urban and Rural Ecological Environment, College of Landscape Architecture, Beijing Forestry University, Beijing 100083, China zqxbjfu@126.com.
authors.forename: Qixiang
authors.initials: Q
authors.lastname: Zhang
authors.affiliation: Beijing Key Laboratory of Ornamental Plants Germplasm Innovation and Molecular Breeding, National Engineering Research Center for Floriculture, Beijing Laboratory of Urban and Rural Ecological Environment, College of Landscape Architecture, Beijing Forestry University, Beijing 100083, China.
authors.forename: Tangren
authors.initials: T
authors.lastname: Cheng
authors.affiliation: Beijing Key Laboratory of Ornamental Plants Germplasm Innovation and Molecular Breeding, National Engineering Research Center for Floriculture, Beijing Laboratory of Urban and Rural Ecological Environment, College of Landscape Architecture, Beijing Forestry University, Beijing 100083, China.
authors.forename: Weiru
authors.initials: W
authors.lastname: Yang
authors.affiliation: Beijing Key Laboratory of Ornamental Plants Germplasm Innovation and Molecular Breeding, National Engineering Research Center for Floriculture, Beijing Laboratory of Urban and Rural Ecological Environment, College of Landscape Architecture, Beijing Forestry University, Beijing 100083, China.
authors.forename: Huitang
authors.initials: H
authors.lastname: Pan
authors.affiliation: Beijing Key Laboratory of Ornamental Plants Germplasm Innovation and Molecular Breeding, National Engineering Research Center for Floriculture, Beijing Laboratory of Urban and Rural Ecological Environment, College of Landscape Architecture, Beijing Forestry University, Beijing 100083, China.
authors.forename: Junjun
authors.initials: J
authors.lastname: Zhong
authors.affiliation: Biomarker Technologies Corporation, Beijing, China.
authors.forename: Long
authors.initials: L
authors.lastname: Huang
authors.affiliation: Biomarker Technologies Corporation, Beijing, China.
authors.forename: Enze
authors.initials: E
authors.lastname: Liu
mesh_terms: D002874:Chromosome Mapping; D032461:Chromosomes, Plant; D008040:Genetic Linkage; D005838:Genotype; D027861:Prunus / Q000235:genetics*; D040641:Quantitative Trait Loci; D017422:Sequence Analysis, DNA
keywords: SLAF-seq; high density; linkage mapping; mei; weeping trait