The GRAS family is a class of specific transcriptional regulatory factors widely present in plants， which play vital roles in regulating plant growth and development， as well as responses to biotic and abiotic stress. It is of great significance to explore the characteristics and functions of GRAS gene family in elephant grass （Pennisetum purpureum） and clarify their regulatory roles under low-temperature stress. Based on the genomic data of elephant grass， in this study we identified members of the GRAS gene family， and analyzed their chromosomal localization， physicochemical properties， gene structural characteristics， phylogenetic relationships， as well as the expression patterns of elephant grass materials with different cold resistance under low-temperature stress. The results showed that a total of 18 GRAS genes were identified in the elephant grass genome， which were distributed on 10 chromosomes and classified into five subfamilies via phylogenetic analysis. Cis-acting element analysis revealed that the promoter regions of 10 PpGRAS members contained regulatory elements related to low-temperature response. Collinearity analysis indicated that elephant grass shared more homologous genes with Sorghum bicolor than that with Oryza sativa. Expression pattern analysis demonstrated that the expression levels of multiple GRAS family members， especially genes such as PpGRAS7 and PpGRAS10 belonging to the LISCL subfamily， were significantly positively correlated with cold resistance capacity of materials. This study provides valuable references for further exploring the functions of elephant grass GRAS family and their response mechanisms to Low-temperature stress.

Pennisetum purpureum  /  GRAS gene family  /  low-temperature stress