Auxin response factor( ARF) is an important transcription factor that can specifically bind auxin responsive gene promoter in plants,and influences the plant growth and development. To better understand the type and quantity of ARF gene families in Gossypium arboretum,we used the method of bioinformatics to analyze the structure types physical mapping of genes and conserved motifs of genome in Gossypium arboretum. The results show that 29 ARF genes,named Ga ARF were identified in the genome of Gossypium arb...