Genome-wide investigation and expression profiling of gene family in rapeseed under salinity and ABA stress.

The () () gene family is a little-known gene family characterized by a conserved LOR domain in the proteins. Limited research in showed that family members played important roles in () defense. Nevertheless, there is a paucity of research investigating the role of the gene family towards their responses to abiotic stresses and hormone treatments. This study encompassed a comprehensive survey of 56 genes in , which is a prominent oilseed crop that holds substantial economic significance in China, Europe, and North America. Additionally, the study evaluated the expression profiles of these genes in response to salinity and ABA stress. Phylogenetic analysis showed that 56 could be divided into 3 subgroups (8 clades) with uneven distribution on 19 chromosomes. 37 out of 56 members have experienced segmental duplication and 5 of them have undergone tandem repeats events with strong evidence of purifying selection. Cis-regulatory elements (CREs) analysis indicated that involved in process such as light response, hormone response, low temperature response, heat stress response, and dehydration response. The expression pattern of family members revealed tissue specificity. RNA-Seq and qRT-PCR were used to validate gene expression under temperature, salinity and ABA stress, revealing that most showed inducibility. This study enhanced our comprehension of the gene family and could provide valuable information for identifying and selecting genes for stress resistant breeding.