Genome-Wide Identification of <i>Brassica napus</i> PEN1-LIKE Genes and Their Expression Profiling in Insect-Susceptible and Resistant Cultivars
Lei Sheng | Zengbei Feng | Zhongping Hao | Shumin Hou
Recently, it has been reported that a gene (PEN1) in <i>Arabidopsis thaliana</i> is highly resistant to <i>Plutella xylostella</i>. We screened all the homologous genes of PEN1 in <i>Arabidopsis thaliana</i> and found that the motif of these genes was very conserved. At present, few insect resistance genes have been identified and characterized in <i>Brassica napus</i>. Therefore, we screened all the homologous genes containing this motif in the <i>Brassica napus</i> genome and systematically analyzed the basic information, conserved domain, evolutionary relationship, chromosomal localization and expression analysis of these genes. In this study, 12 PEN1 homologous genes were identified in the <i>Brassica napus</i> genome, which is more than the number in <i>Arabidopsis thaliana</i>. These genes are unevenly distributed on the 12 chromosomes in <i>Brassica napus</i>. Furthermore, all the PEN1 homologous genes contained light responsiveness elements, and most of the genes contained gibberellin-responsive elements, meJA-responsive elements and abscisic-acid-responsive elements. The results will provide a theoretical basis for screening insect resistance genes from the genome of <i>Brassica napus</i> and analyzing the molecular mechanism of insect resistance in <i>Brassica napus</i>.
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