title: Comparative analysis of genome-wide Mlo gene family in Cajanus cajan and Phaseolus vulgaris.
abstract: The Mlo gene was discovered in barley because the mutant 'mlo' allele conferred broad-spectrum, non-race-specific resistance to powdery mildew caused by Blumeria graminis f. sp. hordei. The Mlo genes also play important roles in growth and development of plants, and in responses to biotic and abiotic stresses. The Mlo gene family has been characterized in several crop species, but only a single legume species, soybean (Glycine max L.), has been investigated so far. The present report describes in silico identification of 18 CcMlo and 20 PvMlo genes in the important legume crops Cajanus cajan (L.) Millsp. and Phaseolus vulgaris L., respectively. In silico analysis of gene organization, protein properties and conserved domains revealed that the C. cajan and P. vulgaris Mlo gene paralogs are more divergent from each other than from their orthologous pairs. The comparative phylogenetic analysis classified CcMlo and PvMlo genes into three major clades. A comparative analysis of CcMlo and PvMlo proteins with the G. max Mlo proteins indicated close association of one CcMlo, one PvMlo with two GmMlo genes, indicating that there was no further expansion of the Mlo gene family after the separation of these species. Thus, most of the diploid species of eudicots might be expected to contain 15-20 Mlo genes. The genes CcMlo12 and 14, and PvMlo11 and 12 are predicted to participate in powdery mildew resistance. If this prediction were verified, these genes could be targeted by TILLING or CRISPR to isolate powdery mildew resistant mutants.
authors.affiliation: Faculty of Science, School of Biotechnology, Banaras Hindu University, Varanasi, 221005, India.
authors.forename: Reena
authors.initials: R
authors.lastname: Deshmukh
authors.affiliation: Faculty of Science, Centre for Bioinformatics, School of Biotechnology, Banaras Hindu University, Varanasi, 221005, India.
authors.forename: V K
authors.initials: VK
authors.lastname: Singh
authors.affiliation: Faculty of Science, School of Biotechnology, Banaras Hindu University, Varanasi, 221005, India. brahmadsingh@gmail.com.
authors.forename: B D
authors.initials: BD
authors.lastname: Singh
mesh_terms: D000595:Amino Acid Sequence; D001203:Ascomycota; D036561:Cajanus / Q000235:genetics*; D060467:Disease Resistance / Q000235:genetics*; D017343:Genes, Plant; D008969:Molecular Sequence Data; D005810:Multigene Family; D027805:Phaseolus / Q000235:genetics*; D010802:Phylogeny; D010935:Plant Diseases / Q000235:genetics / Q000382:microbiology; D010940:Plant Proteins / Q000235:genetics
chemical_list: D010940:Plant Proteins
keywords: Cajanus; Computational biology; Genomics; Mlo gene family; Phaseolus; Phylogeny