Find in Library

<i>WRKY</i> gene family is one of the largest transcription factor families involved in various physiological processes of plants. Flax (<i>Linum usitatissimum</i>) is an important stem fiber crop, and it is also an economically important crop in natural fiber and textile industries around the world. In this study, 105 <i>WRKY</i> genes were obtained by screening the whole genome of flax. There were 26 in group I, 68 in group II, 8 in group III and 3 in group UN. The characteristics of the WRKY motif and gene structure in each group are similar. The promoter sequence of <i>WRKY</i> genes includes photoresponsive elements, core regulatory elements and 12 cis-acting elements under abiotic stress. Similar to <i>A. thaliana</i> and <i>Compositae</i> plants, <i>WRKY</i> genes are evenly distributed on each chromosome, with segmental and tandem repeated events, which play a major role in the evolution of <i>WRKY</i> genes. The flax <i>WRKY</i> gene family is mainly concentrated in group I and group II. This study is mainly based on genome-wide information to classify and analyze the flax <i>WRKY</i> gene family, laying a foundation for further understanding the role of WRKY transcription factors in species evolution and functional analysis.