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    The genome and transcriptome of Phalaenopsis yield insights into floral organ development and flowering regulation

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    13
    Author
    Huang, J-Z; Lin, C-P; Cheng, T-C; Huang, Y-W; Tsai, Y-J; Cheng, S-Y; Chen, Y-W; Lee, C-P; Chung, W-C; Chang, BC-H; ...
    Date
    2016-05-12
    Source Title
    PeerJ
    Publisher
    PEERJ INC
    University of Melbourne Author/s
    Chang, Bill
    Affiliation
    Veterinary Biosciences
    Metadata
    Show full item record
    Document Type
    Journal Article
    Citations
    Huang, J. -Z., Lin, C. -P., Cheng, T. -C., Huang, Y. -W., Tsai, Y. -J., Cheng, S. -Y., Chen, Y. -W., Lee, C. -P., Chung, W. -C., Chang, B. C. -H., Chin, S. -W., Lee, C. -Y. & Chen, F. -C. (2016). The genome and transcriptome of Phalaenopsis yield insights into floral organ development and flowering regulation. PEERJ, 4 (5), https://doi.org/10.7717/peerj.2017.
    Access Status
    Open Access
    URI
    http://hdl.handle.net/11343/259308
    DOI
    10.7717/peerj.2017
    Abstract
    The Phalaenopsis orchid is an important potted flower of high economic value around the world. We report the 3.1 Gb draft genome assembly of an important winter flowering Phalaenopsis 'KHM190' cultivar. We generated 89.5 Gb RNA-seq and 113 million sRNA-seq reads to use these data to identify 41,153 protein-coding genes and 188 miRNA families. We also generated a draft genome for Phalaenopsis pulcherrima 'B8802,' a summer flowering species, via resequencing. Comparison of genome data between the two Phalaenopsis cultivars allowed the identification of 691,532 single-nucleotide polymorphisms. In this study, we reveal that the key role of PhAGL6b in the regulation of labellum organ development involves alternative splicing in the big lip mutant. Petal or sepal overexpressing PhAGL6b leads to the conversion into a lip-like structure. We also discovered that the gibberellin pathway that regulates the expression of flowering time genes during the reproductive phase change is induced by cool temperature. Our work thus depicted a valuable resource for the flowering control, flower architecture development, and breeding of the Phalaenopsis orchids.

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