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Genetical genomics dissection of cotton fiber quality

Lacape Jean-Marc, Jacobs John, Llewellyn Danny. 2008. Genetical genomics dissection of cotton fiber quality. In : International Cotton Genome Initiative Research Conference (ICGI 2008), Anyang, Chine, July 8-11, 2008. s.l. : s.n., Résumé, p. 30. (Cotton science, 20) International Cotton Genome Initiative Research Conference, Anyang, Chine, 8 July 2008/11 July 2008.

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Abstract : Cotton fiber is a commodity of key economic importance in both developed and developing countries. The two cultivated species, Gossypium hirsutum and G. barbadense , are tetraploid (2n=1x= 52 . 2.3 Gb). Cotton fibers are single-celled trichomes of the outermost epidermallayer of the ovule and elongate extensively to 25-50 mm. The final quality of the fiber results from complex developmentai processes and improvement of cotton fiber quality remains a challenge for many research groups worldwide. Although traditional breeding methods have proven efficient, the contribution of molecular genetics and genomic tools are gaining interest and the cotton fiber transcriptome has attracted a lot of attention in recent years. The major objective of the project (acronym Cotton_RILs) sponsored by the French National Research Agency (ANR) , is the genetic and genomic dissection of important fiber quality characteristics using a combination of classical QTL mapping and of gene expression QTL mapping. The integrated genetics and genomics approach (or genetical genomics approach) in this project is centered on a population of interspecific G. hirsutum X G. harhadense recombinant inbred lines (RILs) created by CIRAD. Specifie objectives are, 1. Construction of a saturated genetic map, 2. QTL mapping through multi-site phenotypic evaluation on 1 continents. 3. Population-wide gene expression analysis through microarray and cDNA-AFLP profilings and for 1 or 2 key developmental stages, and 4. Genetic fine mapping of selected QTLs using a large F, population. The 3 participants in the project. CIRAD (Montpellier, France) . Bayer Crop Science (Gent . Belgium). and CSIRü (Canberra , Australia) , have active research programs in applied genetics both through c1assical breeding and using modern biotechnology. Past achievements of the 3 laboratories are recognized worldwide and they are highly complementary in terms of their scientific expertise. Apart from greenhouses and biotechnology laboratories in their respective primary sites, they provide access to a broad range of field experimental sites on 4 continents, in Brazil and Cameroon through CIRAD partnerships and in the USA for Bayer CS. (Texte intégral)

Mots-clés Agrovoc : Gossypium barbadense, Gossypium hirsutum, Hybridation interspécifique, Amélioration des plantes, Carte génétique, Génie génétique, Qualité, Fibre végétale

Mots-clés géographiques Agrovoc : France, Belgique, Australie

Mots-clés complémentaires : Fibre de coton, QTL

Classification Agris : F30 - Plant genetics and breeding
Q60 - Processing of non-food or non-feed agricultural products

Auteurs et affiliations

  • Lacape Jean-Marc, CIRAD-BIOS-UMR DAP (FRA)
  • Jacobs John, Bayer (BEL)
  • Llewellyn Danny, CSIRO (AUS)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/565487/)

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