期刊
DNA RESEARCH
卷 22, 期 3, 页码 183-191出版社
OXFORD UNIV PRESS
DOI: 10.1093/dnares/dsv003
关键词
mei; high density; linkage mapping; SLAF-seq; weeping trait
资金
- Fundamental Research Funds for the Ministry of Science and Technology [2011AA100207]
- Fundamental Research Funds for Central Universities [BLYJ201407]
- Special Fund for Beijing Common Construction Project
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.
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