Gene duplication provides raw genetic materials for evolutionary novelty and adaptation. The evolutionary fate of duplicated transcription factor genes is less studied although transcription factor gene plays important roles in many biological processes. TFIIAgamma is a small subunit of TFIIA that is one of general transcription factors required by RNA polymerase II. Previous studies identified two TFIIAgamma-like genes in rice genome and found that these genes either conferred resistance to rice bacterial blight or could be induced by pathogen invasion, raising the question as to their functional divergence and evolutionary fates after gene duplication.
Sun, H. Z., & Ge, S. (2010). Molecular evolution of the duplicated TFIIA genes in Oryzeae and its relatives. BMC Evolutionary Biology, 10(1). https://doi.org/10.1186/1471-2148-10-128