Contrasted microcolinearity and gene evolution within a homoeologous region of wheat and barley species

被引：12

作者：

Chantret, Nathalie ^{[1
]}

Salse, Jerome ^{[2
]}

Sabot, Francois ^{[2
,6
]}

Bellec, Arnaud ^{[3
]}

Laubin, Bastien ^{[2
]}

Dubois, Ivan ^{[4
]}

Dossat, Carole ^{[4
]}

Sourdille, Pierre ^{[2
]}

Joudrier, Philippe ^{[5
]}

Gautier, Marie-Francoise ^{[5
]}

Cattolico, Laurence ^{[4
]}

Beckert, Michel ^{[2
]}

Aubourg, Sebastien ^{[3
]}

Weissenbach, Jean ^{[4
]}

Caboche, Michel ^{[3
]}

Leroy, Philippe ^{[2
]}

Bernard, Michel ^{[2
]}

Chalhoub, Boulos ^{[3
]}

机构：

[1] INRA UMR DIAPC, F-34130 Mauguio, France

[2] Ameliorat & Sante Plantes, UMR 1095, INRA UBP, F-63039 Clermont Ferrand 2, France

[3] Unite Rech Genom Vegetale INRA URGV, Lab Genome Org, F-91057 Evry, France

[4] GENOSCOPE CNRG, F-91057 Evry, France

[5] Dev & Ameliorat Plantes, INRA, UMR 1098, F-34060 Montpellier 01, France

[6] CNRS UPVD IRD, UMR 5096, Lab Genome & Dev Plantes, Transposable Elements Plant Genomes Grp, F-66860 Perpignan, France

来源：

JOURNAL OF MOLECULAR EVOLUTION | 2008年 / 66卷 / 02期

关键词：

comparative genomics; gene evolution; polyploidy; wheat;

D O I：

10.1007/s00239-008-9066-8

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

We study here the evolution of genes located in the same physical locus using the recently sequenced Ha locus in seven wheat genomes in diploid, tetraploid, and hexaploid species and compared them with barley and rice orthologous regions. We investigated both the conservation of microcolinearity and the molecular evolution of genes, including coding and noncoding sequences. Microcolinearity is restricted to two groups of genes (Unknown gene-2, VAMP, BGGP, Gsp-1, and Unknown gene-8 surrounded by several copies of ATPase), almost conserved in rice and barley, but in a different relative position. Highly conserved genes between wheat and rice run along with genes harboring different copy numbers and highly variable sequences between close wheat genomes. The coding sequence evolution appeared to be submitted to heterogeneous selective pressure and intronic sequences analysis revealed that the molecular clock hypothesis is violated in most cases.

引用

页码：138 / 150

页数：13

共 45 条

[1] The organization and rate of evolution of wheat genomes are correlated with recombination rates along chromosome arms. [J].