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Analysis of the Musa genome from BAC sequencing and its comparison with rice

Piffanelli Pietro, Ciampi Ana, Ruiz Manuel, Rodrigues da Silva Felipe, Lescot Magali, Papas Georgios J., Ronning Catherine, Haas Brian, Wortman Jennifer, Frison Emile A., Roux Nicolas, Miller Roberto Neil Gerard, Côte François-Xavier, D'Hont Angélique, Souza Manoel, Glaszmann Jean-Christophe, Town Christopher. 2005. Analysis of the Musa genome from BAC sequencing and its comparison with rice. In : Abstracts of Plant and Animal Genomes XIIIth Conference, San Diego, CA (USA), January 15-19, 2005. s.l. : s.n., Résumé Plant and Animal Genomes Conference. 13, San Diego, États-Unis, 15 January 2005/19 January 2005.

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Abstract : Within the MusaGenomics Consortium three BAC libraries were constructed from the genomes of Musa acuminata (diploid Calcutta-4, triploid Cavendish) and Musa balbisiana (diploid PKW). To study the structure and evolution of Musa genomes in relation to those of rice and sorghum, 50 Sorghum bicolor cDNA clones (EGRAM genes), were used as probes to screen the M. acuminata BAC library. Nine BAC clones were selected using EGRAM probes of known function, analysed by BAC-end sequencing and RFLP-fingerprinting, and sequenced. In addition, BAC clones believed to arise from the homeologous region on the A and B Musa genomes were identified using M. acuminata probes encoding for genes of agronomic interest. We have completely sequenced thirteen Musa BACs (~1.4 Mb), having a gene density of approximately one per 5 kb. The base composition of the CDSs ranges from 35% GC to 75% GC and shows a bimodal distribution. A subset of the genes shows a gradient in GC content along the coding sequence similar to rice, while the other set has a uniform base composition like Arabidopsis. At least one region of microsynteny was observed between Musa and rice, in which 6 genes are found in the same order of rice chromosome 5. Comparison of presumed homeologous BACs from the A and B genomes showed almost complete conservation of gene content and order. Retrotransposon content of these gene rich BACs was low. Preliminary phylogenetic analysis of individual genes suggests that Musa is as close to members of the Asparagales as to the Poales. (Texte intégral)

Mots-clés Agrovoc : Musa acuminata, Musa balbisiana, Génome, Caractère agronomique, Séquence nucléotidique, Phylogénie, Banque de gènes, Vecteur génétique, Chromosome, Oryza sativa, Sorghum bicolor

Mots-clés complémentaires : Chromosome artificiel

Classification Agris : F30 - Plant genetics and breeding

Auteurs et affiliations

  • Piffanelli Pietro, CIRAD-AMIS-UMR PIA (FRA)
  • Ciampi Ana, EMBRAPA (BRA)
  • Ruiz Manuel, CIRAD-AMIS-UMR PIA (FRA) ORCID: 0000-0001-8153-276X
  • Rodrigues da Silva Felipe, EMBRAPA (BRA)
  • Lescot Magali
  • Papas Georgios J., UCB (BRA)
  • Ronning Catherine, TIGR (USA)
  • Haas Brian, TIGR (USA)
  • Wortman Jennifer, TIGR (USA)
  • Frison Emile A., INIBAP (FRA)
  • Roux Nicolas, INIBAP (FRA)
  • Miller Roberto Neil Gerard, UCB (BRA)
  • Côte François-Xavier, CIRAD-FLHOR-UPR Systèmes bananes et ananas (FRA)
  • D'Hont Angélique, CIRAD-AMIS-UMR PIA (FRA)
  • Souza Manoel, EMBRAPA (BRA)
  • Glaszmann Jean-Christophe, CIRAD-AMIS-UMR PIA (FRA) ORCID: 0000-0001-9918-875X
  • Town Christopher, TIGR (USA)

Autres liens de la publication

Source : Cirad - Agritrop (https://agritrop.cirad.fr/525792/)

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