Genome-Wide Analysis of the / Gene Family in Cotton ( spp.).

Cohesin is a ring-shaped protein complex and plays a critical role in sister chromosome cohesion, which is a key event during mitosis and meiosis. Meiotic recombination protein REC8 is one of the subunits of the cohesion complex. Although genes have been characterized in some plant species, little is known about them in . In this study, 89 genes were identified and analyzed in 16 plant species (including 4 species); 12 genes were identified in , 11 in , 7 in and 5 in . In a phylogenetic analysis, the 89 genes clustered into 6 subfamilies (I-VI). The chromosome location, exon-intron structure, and motifs of the genes in the species were also analyzed. Expression patterns of genes in various tissues and under abiotic stress treatments were analyzed based on public RNA-seq data, which indicated that genes might have different functions in growth and development. Additionally, qRT-PCR analysis showed that MeJA, GA, SA, and ABA treatments could induce the expression of genes. In general, the genes of the gene family of cotton were systematically analyzed, and their potential function in cotton mitosis, meiosis, and in response to abiotic stress and hormones were preliminary predicted, which provided an important basis for further research on cotton development and resistance to abiotic stress.