DNA variation in the acidic chitinase locus (ChiA) region in Arabis gemmifera and its related species
スポンサーリンク
概要
- 論文の詳細を見る
We analyzed DNA variation at the acidic chitinase (ChiA) locus of Arabis gemmifera and among its eight related species. Nucleotide diversity (π) of the entire locus in A. gemmifera was 0.0032, which was one third that of A. thaliana. In A. gemmifera, an excess of unique polymorphisms yielded significantly negative results with the tests of Tajima and Fu and Li. The McDonald and Kreitman test revealed that the ratio of nucleotide replacement to synonymous changes in A. gemmifera was significantly greater than those between A. gemmifera and A. glabra, A. gemmifera and A. griffithiana, A. gemmifera and A. korshinskyi, A. gemmifera and A. wallichii, and A. gemmifera and A. himalaica. These results indicated that the neutrality assumption, the equilibrium population assumption, or both, could not be applied to the ChiA locus of A. gemmifera. The small size and relative isolation of local subpopulations of A. gemmifera could explain the excess of unique polymorphisms and the high proportion of replacement changes. The specific sampling scheme of this study, where one strain each was sampled from each local subpopulation might also have led to an excess of singletons. Interspecific comparison among Arabidopsis, Arabis and Cardaminopsis species showed that Ka was always lower than Ks, providing evidence against the adaptive evolution of ChiA. However, Ka/Ks was greater between closely related species than between more distant related species. ChiA had a higher level of replacement divergence and a lower level of synonymous divergence compared than did Adh. We suggest that both the mutation rate at the nucleotide level and the selective constraints at the protein level are lower in ChiA than in Adh.
- 日本遺伝学会の論文
- 2002-06-25
著者
-
MIYASHITA Naohiko
Laboratory of Plant Genetics, Graduate School of Agriculture, Kyoto University
-
Kawabe Akira
Laboratory Of Plant Genetics Graduate School Of Agriculture Kyoto University
関連論文
- DNA polymorphism in the blast disease resistance gene Pita of the wild rice Oryza rufipogon and its related species
- DNA polymorphism in the SUPERWOMAN1 (SPW1) locus of the wild rice Oryza rufipogon and its related species
- DNA polymorphism at the ACAULIS5 locus of the wild plant Arabidopsis thaliana
- DNA variation in the metallothionein genes in wild rice Oryza rufipogon: Relationship between DNA sequence polymorphism, codon bias and gene expression
- Polymerase chain reaction -single strand conformational polymorphism analysis of intra- and interspecific variations in organellar DNA regions of Aegilops mutica and related species
- Chromosome-specific satellite sequences in Turritis glabra
- DNA variation in the acidic chitinase locus (ChiA) region in Arabis gemmifera and its related species
- 自家不和合性遺伝子座における対立遺伝子の有効数,ヘテロザイゴシティの期待値および遺伝的距離を推定するための統計的方法〔英文〕
- キイロショウジョウバエのforkedとvermilion遺伝子領域の制限地図多型現象〔英文〕
- Characterization of duplicated two cytosolic phosphoglucose isomerase (PgiC) loci in Arabidopsis halleri ssp. gemmifera
- Phylogenetic relationship among the section Stenophora in the genus Dioscorea based on the analysis of nucleotide sequence variation in the phosphoglucose isomerase(Pgi)locus
- Patterns of codon usage bias in three dicot and four monocot plant species