@article{fdi:010067534, title = {{T}he evolutionary dynamics of ancient and recent polyploidy in the {A}frican semiaquatic species of the legume genus {A}eschynomene}, author = {{C}haintreuil, {C}l{\'e}mence and {G}ully, {D}jamel and {H}ervouet, {C}. and {T}ittabutr, {P}. and {R}andriambanona, {H}. and {B}rown, {S}.{P}. and {L}ewis, {G}.{P}. and {B}ourge, {M}. and {C}artieaux, {F}abienne and {B}oursot, {M}arc and {R}amanankierana, {H}. and {D}'{H}ont, {A}. and {T}eaumroong, {N}. and {G}iraud, {E}ric and {A}rrighi, {J}ean-{F}ran{\c{c}}ois}, editor = {}, language = {{ENG}}, abstract = {{T}he legume genus {A}eschynomene is notable in the ability of certain semiaquatic species to develop nitrogen-fixing stem nodules. {T}hese species are distributed in two clades. {I}n the first clade, all the species are characterized by the use of a unique {N}od-independent symbiotic process. {I}n the second clade, the species use a {N}od-dependent symbiotic process and some of them display a profuse stem nodulation as exemplified in the {A}frican {A}eschynomene afraspera. {T}o facilitate the molecular analysis of the symbiotic characteristics of such legumes, we took an integrated molecular and cytogenetic approach to track occurrences of polyploidy events and to analyze their impact on the evolution of the {A}frican species of {A}eschynomene. {O}ur results revealed two rounds of polyploidy: a paleopolyploid event predating the {A}frican group and two neopolyploid speciations, along with significant chromosomal variations. {H}ence, we found that {A}. afraspera (8x) has inherited the contrasted genomic properties and the stem-nodulation habit of its parental lineages (4x). {T}his study reveals a comprehensive picture of {A}frican {A}eschynomene diversification. {I}t notably evidences a history that is distinct from the diploid {N}od-independent clade, providing clues for the identification of the specific determinants of the {N}od-dependent and {N}od-independent symbiotic processes, and for comparative analysis of stem nodulation.}, keywords = {}, booktitle = {}, journal = {{N}ew {P}hytologist}, volume = {211}, numero = {3}, pages = {1077–1091 [en ligne]}, ISSN = {1469-8137}, year = {2016}, DOI = {10.1111/nph.13956}, URL = {https://www.documentation.ird.fr/hor/fdi:010067534}, }