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  • Title: [Genome-wide identification and analysis of WRKY transcription factors in Medicago truncatula].
    Author: Song H, Nan Z.
    Journal: Yi Chuan; 2014 Feb; 36(2):152-68. PubMed ID: 24846944.
    Abstract:
    WRKY gene family plays important roles in plant by involving in transcriptional regulations during various physiologically processes such as development, metabolism and responses to biotic and abiotic stresses. WRKY genes have been identified in various plants. However, only few WRKY genes in Medicago truncatula have been identified with systematic analysis and comparison. In this study, we identified 93 WRKY genes through analyses of M. truncatula genome. These genes include 19 type-I genes, 49 type II genes and 13 type-III genes, and 12 non-regular type genes. All of these genes were characterized through analyses of gene duplication, chromosomal locations, structural diversity, conserved protein motifs and phylogenetic relations. The results showed that 11 times of gene duplication event occurred in WRKY gene family involving 24 genes. WRKY genes, containing 6 gene clusters, are unevenly distributed into chromosome 1 to 6, and there is the purifying selection pressure in WRKY group III genes.
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