Genome-Wide Identification and Transcriptional Expression of the Gene Family in Common Walnut ( L.).

L. is an economically important crop cultivated worldwide for its high quality and quantity of wood and nuts. Phenylalanine ammonia-lyase (PAL) is the first enzyme in the phenylpropanoid pathway that plays a critical role in plant growth, development, and adaptation, but there have been few reports of the gene family in common walnut. Here, we report a genome-wide study of genes and analyze their phylogeny, duplication, microRNA, and transcriptional expression. A total of 12 genes were identified in the common walnut and clustered into two subfamilies based on phylogenetic analysis. These common walnut s are distributed on eight different pseudo-chromosomes. Seven of the 12 s (, , , , , , and ) were specific found in , and , , , , and were found to be closely associated with the woody plant . Additionally, the expression patterns of , , , and showed that they had high expression in female and male flowers. The miRNA ath-miR830-5p regulates two genes, and , such that they have low expression in the male and female flowers of the common walnut. Our research provides useful information for further research into the function of genes in common walnut and .