Evolution of the banana genome (Musa acuminata) is impacted by large chromosomal translocations

Martin Guillaume, Carreel Françoise, Coriton Olivier, Hervouet Catherine, Cardi Céline, Derouault Paco, Roques Danièle, Salmon Frédéric, Rouard Mathieu, Sardos Julie, Labadie Karine, Baurens Franc-Christophe, D'Hont Angélique. 2017. Evolution of the banana genome (Musa acuminata) is impacted by large chromosomal translocations. Molecular Biology and Evolution, 34 (9), 28 p.

https://doi.org/10.1093/molbev/msx164

Article de revue ; Article de recherche ; Article de revue à facteur d'impact

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Quartile : Outlier, Sujet : GENETICS & HEREDITY / Quartile : Outlier, Sujet : EVOLUTIONARY BIOLOGY / Quartile : Outlier, Sujet : BIOCHEMISTRY & MOLECULAR BIOLOGY

Liste HCERES des revues (en SHS) : oui

Thème(s) HCERES des revues (en SHS) : Anthropologie-Ethnologie; Psychologie-éthologie-ergonomie

Résumé : Most banana cultivars are triploid seedless parthenocarpic clones derived from hybridization between Musa acuminata subspecies and sometimes M. balbisiana. M. acuminata subspecies were suggested to differ by a few large chromosomal rearrangements based on chromosome pairing configurations in inter-subspecies hybrids. We searched for large chromosomal rearrangements in a seedy M. acuminata ssp. malaccensis banana accession through mate-pair sequencing, BAC-FISH, targeted PCR and marker (DArTseq) segregation in its progeny. We identified a heterozygous reciprocal translocation involving two distal 3 Mb and 10 Mb segments from chromosomes 01 and 04, respectively, and showed that it generated high segregation distortion, reduced recombination and linkage between chromosomes 01 and 04 in its progeny. The two chromosome structures were found to be mutually exclusive in gametes and the rearranged structure was preferentially transmitted to the progeny. The rearranged chromosome structure was frequently found in triploid cultivars but present only in wild malaccensis ssp. accessions, thus suggesting that this rearrangement occurred in M. acuminata ssp. malaccensis. We propose a mechanism for the spread of this rearrangement in Musa diversity and suggest that this rearrangement could have played a role in the emergence of triploid cultivars.

Mots-clés Agrovoc : Musa acuminata, translocation chromosomique, génome, ségrégation, chromosome, séquence nucléotidique, génotype, génie génétique

Mots-clés complémentaires : Séquencage

Mots-clés libres : Musa, Chromosome, Translocation, Segregation distortion, Mate-pair sequencing, Genotyping by sequencing

Classification Agris : F30 - Génétique et amélioration des plantes
F63 - Physiologie végétale - Reproduction

Champ stratégique Cirad : Axe 1 (2014-2018) - Agriculture écologiquement intensive

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