Small RNA and transcriptome deep sequencing proffers insight into floral gene regulation in Rosa cultivars

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Title
Small RNA and transcriptome deep sequencing proffers insight into floral gene regulation in Rosa cultivars
Author(s)
Jungeun Kim; J H Park; Chan Ju Lim; J Y Lim; J Y Ryu; B W Lee; Jae Pil Choi; Woong Bom Kim; Ha Yeon Lee; Y Choi; D Kim; Cheol-Goo Hur; Suk Weon Kim; Y S Noh; C Shin; Suk Yoon Kwon
Bibliographic Citation
BMC Genomics, vol. 13, pp. 657-657
Publication Year
2012
Abstract
Background: Roses (Rosa sp.), which belong to the family Rosaceae, are the most economically important ornamental plants-making up 30% of the floriculture market. However, given high demand for roses, rose breeding programs are limited in molecular resources which can greatly enhance and speed breeding efforts. A better understanding of important genes that contribute to important floral development and desired phenotypes will lead to improved rose cultivars. For this study, we analyzed rose miRNAs and the rose flower transcriptome in order to generate a database to expound upon current knowledge regarding regulation of important floral characteristics. A rose genetic database will enable comprehensive analysis of gene expression and regulation via miRNA among different Rosa cultivars.Results: We produced more than 0.5 million reads from expressed sequences, totalling more than 110 million bp. From these, we generated 35,657, 31,434, 34,725, and 39,722 flower unigenes from Rosa hybrid: 'Vital', 'Maroussia', and 'Sympathy' and Rosa rugosa Thunb. , respectively. The unigenes were assigned functional annotations, domains, metabolic pathways, Gene Ontology (GO) terms, Plant Ontology (PO) terms, and MIPS Functional Catalogue (FunCat) terms. Rose flower transcripts were compared with genes from whole genome sequences of Rosaceae members (apple, strawberry, and peach) and grape. We also produced approximately 40 million small RNA reads from flower tissue for Rosa, representing 267 unique miRNA tags. Among identified miRNAs, 25 of them were novel and 242 of them were conserved miRNAs. Statistical analyses of miRNA profiles revealed both shared and species-specific miRNAs, which presumably effect flower development and phenotypes.Conclusions: In this study, we constructed a Rose miRNA and transcriptome database, and we analyzed the miRNAs and transcriptome generated from the flower tissues of four Rosa cultivars. The database provides a comprehensive genetic resource which can be used to better understand rose flower development and to identify candidate genes for important phenotypes.
ISSN
1471-2164
Publisher
Springer-BMC
DOI
http://dx.doi.org/10.1186/1471-2164-13-657
Type
Article
Appears in Collections:
Jeonbuk Branch Institute > Biological Resource Center > 1. Journal Articles
Division of Biomaterials Research > 1. Journal Articles
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