Poplar MYBS2 gene and application thereof

The invention relates to a poplar MYBS2 gene and application thereof, and belongs to the technical field of gene engineering. The invention provides a poplar MYBS2 gene. The nucleotide sequence of the poplar MYBS2 gene is shown as SEQ ID NO. 1. After the expression of the MYBS2 gene of the poplar is reduced by using an RNAi technology, the height, stem girth, branch number, dry weight and fresh weight of the poplar are improved; under drought and salt stress conditions, the change of the growth state of a wild type poplar plant is more obvious than that of a transgenic poplar strain, and the RNAi transgenic poplar under the drought stress condition grows faster than that of the wild type plant. The expression quantity of the poplar MYBS2 gene is in negative correlation with the poplar biomass and stress resistance, so that a new poplar variety with high yield and strong stress resistance can be obtained by interfering the expression of the poplar MYBS2 gene, and the poplar MYBS2 gene has good market prospect