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Paleo-evolutionary plasticity of plant disease resistance genes

文献类型： 外文期刊

作者： Zhang, Rongzhi 1 ; Murat, Florent 1 ; Pont, Caroline 1 ; Langin, Thierry 1 ; Salse, Jerome 1 ;

作者机构： 1.INRA, UBP UMR GDEC Genet Divers & Ecophysiol Cereales 1, F-63100 Clermont Ferrand, France

2.Shandong Acad Agr Sci, Inst Crop Sci, Jinan 250100, Peoples R China

关键词： R-genes;Duplication;Plasticity;Evolution

期刊名称：BMC GENOMICS （ 影响因子：3.969； 五年影响因子：4.478 ）

ISSN： 1471-2164

年卷期： 2014 年 15 卷

页码：

收录情况： SCI

摘要： Background: The recent access to a large set of genome sequences, combined with a robust evolutionary scenario of modern monocot (i.e. grasses) and eudicot (i.e. rosids) species from their founder ancestors, offered the opportunity to gain insights into disease resistance genes (R-genes) evolutionary plasticity. Results: We unravel in the current article (i) a R-genes repertoire consisting in 7883 for monocots and 15758 for eudicots, (ii) a contrasted R-genes conservation with 23.8% for monocots and 6.6% for dicots, (iii) a minimal ancestral founder pool of 384 R-genes for the monocots and 150 R-genes for the eudicots, (iv) a general pattern of organization in clusters accounting for more than 60% of mapped R-genes, (v) a biased deletion of ancestral duplicated R-genes between paralogous blocks possibly compensated by clusterization, (vi) a bias in R-genes clusterization where Leucine-Rich Repeats act as a 'glue' for domain association, (vii) a R-genes/miRNAs interome enriched toward duplicated R-genes. Conclusions: Together, our data may suggest that R-genes family plasticity operated during plant evolution (i) at the structural level through massive duplicates loss counterbalanced by massive clusterization following polyploidization; as well as at (ii) the regulation level through microRNA/R-gene interactions acting as a possible source of functional diploidization of structurally retained R-genes duplicates. Such evolutionary shuffling events leaded to CNVs (i.e. Copy Number Variation) and PAVs (i.e. Presence Absence Variation) between related species operating in the decay of R-genes colinearity between plant species.

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