title: Phylogenetic genomewide comparisons of the pentatricopeptide repeat gene family in indica and japonica rice.
abstract: More than 400 pentatricopeptide repeat (PPR) genes have been found in higher plants, but most of them have not been functionally analyzed and their origins are still obscure. In this study, we performed phylogenetic genomewide comparisons of the PPR gene family in indica and japonica rice to explore the expansion mechanisms of these genes in higher plants. The functions of PPR genes in plant CMS/Rf systems are also discussed. The results indicate that (1) unequal crossing over participated in the expansion of the newly evolved PPR genes in indica and japonica rice genomes, (2) CMS/Rf systems are different in monocots and dicots, (3) the BT-type CMS/Rf system exists in both indica and japonica rice, and (4) both the PPR gene family and the BT-type CMS/Rf system may have existed before the divergence of indica and japonica rice.
authors.affiliation: Key Laboratory of Molecular Biology and Genetic Engineering of Jiangxi Province, College of Life Sciences and Food Engineering, Nanchang University, Nanchang, 330031, China. heshaoboli@gmail.com
authors.forename: Shaobo
authors.initials: S
authors.lastname: Li
authors.forename: Qingping
authors.initials: Q
authors.lastname: Sun
authors.forename: Minghua
authors.initials: M
authors.lastname: Hu
authors.forename: Shaoqing
authors.initials: S
authors.lastname: Li
authors.forename: Youlin
authors.initials: Y
authors.lastname: Zhu
authors.forename: Yingguo
authors.initials: Y
authors.lastname: Zhu
mesh_terms: D020816:Amino Acid Motifs; D017360:Arabidopsis / Q000235:genetics; D029681:Arabidopsis Proteins / Q000235:genetics; D003434:Crossing Over, Genetic; D019143:Evolution, Molecular; D018506:Gene Expression Regulation, Plant; D017343:Genes, Plant; D014644:Genetic Variation; D005810:Multigene Family / Q000235:genetics*; D012275:Oryza / Q000145:classification / Q000235:genetics*; D010802:Phylogeny; D010940:Plant Proteins / Q000235:genetics; D012091:Repetitive Sequences, Nucleic Acid; D013045:Species Specificity
chemical_list: D029681:Arabidopsis Proteins; D010940:Plant Proteins; C538752:pentatricopeptide repeat protein, Arabidopsis