MYB-related gene family plays important roles in plant growth， development， and stress response. This study analyzed the number， evolutionary relationships， gene structure， and physicochemical properties of MYB-related family genes in Atraphaxis bracteata by bioinformatics methods based on the full-length transcriptome data of A. bracteate. The qRT-PCR was used to analyze the temporal and spatial expression patterns of these genes in various tissues of A. bracteata under drought stress， and to analyze their response to drought stress. The results showed that a total of 55 MYB-related family members of A. bracteata were identified and divided into 5 subgroups. The encoded proteins were mostly hydrophilic and mainly located in the nucleus. Motif 2 was the characteristic motif， while Motif 4 had the highest conservation. The secondary and tertiary structures of their proteins were mainly irregularly coiled. Expression analysis showed that after 24 h of drought stress， gene expression levels were higher than those at 6 h and 0 h， and most of these genes were highly expressed in the leaves. These genes responded more strongly in roots and stems under severe drought， while they had higher expression levels in leaves under mild drought. In summary， the MYB-related gene family of A. bracteata exhibited distinct tissue-specific expression patterns under drought stress， laying a theoretical foundation for subsequent functional research and stress resistant breeding.

Atraphaxis bracteata  /  MYB-related  /  Drought stress  /  Expression pattern