1. Comparative analysis of NBS-LRR genes and their response to Aspergillus flavus in Arachis
- Author
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Baozhu Guo, Changsheng Li, Chuanzhi Zhao, Xingjun Wang, Suoyi Han, Han Xia, Pengfei Wang, Xinyou Zhang, Yuping Bi, and Hui Song
- Subjects
0106 biological sciences ,0301 basic medicine ,Arachis ,Gene Expression ,lcsh:Medicine ,Pathology and Laboratory Medicine ,01 natural sciences ,Genome ,Database and Informatics Methods ,Medicine and Health Sciences ,lcsh:Science ,Phylogeny ,Plant Proteins ,Fungal Pathogens ,Genetics ,Multidisciplinary ,Chromosome Biology ,food and beverages ,Phylogenetic Analysis ,Genomics ,Plants ,Legumes ,Genomic Databases ,Aspergillus ,Experimental Organism Systems ,Medical Microbiology ,Multigene Family ,Aspergillus Flavus ,Tandem exon duplication ,Pathogens ,Research Article ,Arabidopsis Thaliana ,Mycology ,Brassica ,Paralogous Gene ,Biology ,Research and Analysis Methods ,Microbiology ,Chromosomes ,Arachis duranensis ,03 medical and health sciences ,Model Organisms ,Arachis ipaensis ,Plant and Algal Models ,Gene family ,Molecular Biology Techniques ,Microbial Pathogens ,Molecular Biology ,Gene ,Molecular Biology Assays and Analysis Techniques ,fungi ,lcsh:R ,Organisms ,Fungi ,Computational Biology ,Biology and Life Sciences ,Cell Biology ,Genome Analysis ,Chromosome Pairs ,biology.organism_classification ,Molds (Fungi) ,Peanut ,Biological Databases ,030104 developmental biology ,lcsh:Q ,010606 plant biology & botany - Abstract
Studies have demonstrated that nucleotide-binding site–leucine-rich repeat (NBS–LRR) genes respond to pathogen attack in plants. Characterization of NBS–LRR genes in peanut is not well documented. The newly released whole genome sequences of Arachis duranensis and Arachis ipaënsis have allowed a global analysis of this important gene family in peanut to be conducted. In this study, we identified 393 (AdNBS) and 437 (AiNBS) NBS–LRR genes from A. duranensis and A. ipaënsis, respectively, using bioinformatics approaches. Full-length sequences of 278 AdNBS and 303 AiNBS were identified. Fifty-one orthologous, four AdNBS paralogous, and six AiNBS paralogous gene pairs were predicted. All paralogous gene pairs were located in the same chromosomes, indicating that tandem duplication was the most likely mechanism forming these paralogs. The paralogs mainly underwent purifying selection, but most LRR 8 domains underwent positive selection. More gene clusters were found in A. ipaënsis than in A. duranensis, possibly owing to tandem duplication events occurring more frequently in A. ipaënsis. The expression profile of NBS–LRR genes was different between A. duranensis and A. hypogaea after Aspergillus flavus infection. The up-regulated expression of NBS–LRR in A. duranensis was continuous, while these genes responded to the pathogen temporally in A. hypogaea.
- Published
- 2017