family members were screened and identified using the bioinformatics method based on the genomic database of B. napus
, and bioinformatics analysis was performed on the sequence characteristics of the identified BnaMAP70s
gene family members. Gene expression levels of BnaMAP70s
gene family members were analyzed with qRT-PCR in seedlings of sensitive to waterlogging and strong waterlogging tolerance varieties. The results showed that 19 members of the BnaMAP70
gene family were identified, distributed on 11 chromosomes and they
could be divided into five subfamilies. The upstream elements involved in anaerobic stress and phytohormones of the BnaMAP70s
promoter indicated that they might involve plant growth, development, and regulation of waterlogging stress. And the transcription levels of genes are species-specific, plant site-specific and time-specific. The qRT-PCR analysis results showed that BnaMAP70-1
were differentially expressed under waterlogging stress, indicating that these two genes were regulated by waterlogging stress.