Use of molecular markers in participatory plant breeding: assessing the genetic variability in cotton populations bred by farmers

Lançon Jacques, Pichaut Jean-Philippe, Djaboutou Mossibaou, Lewicki-Dhainaut Sylvie, Viot Christopher, Lacape Jean-Marc. 2008. Use of molecular markers in participatory plant breeding: assessing the genetic variability in cotton populations bred by farmers. Annals of Applied Biology, 152 (1) : pp. 113-119.

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Abstract : In participatory plant breeding, farmers are involved in simple selection schemes that are not suitable for assessing genetic variability in the segregating populations. We propose to use information derived from molecular marker analyses to help monitoring such populations. In this study, we used three indicators to compare genetic variability in eight genetic structures, that is three plant populations selected by farmers over five generations, three nonselected populations and two commercial varieties. The three indicators were the polymorphic locus rate, heterozygosity rate and dissimilarity index. The results highlighted that the genetic variability decreased more with farmers¿ selection than with environmental factors. The breeding process was not complete because genetic variability in the selected populations was midway between that of the nonselected populations and that of the commercial varieties monitored. The three proposed indicators were relevant for describing the studied populations. They could be interpreted according to a grid drawn up on the basis of the results of the present study. (Résumé d'auteur)

Mots-clés Agrovoc : Gossypium hirsutum, Sélection massale, Variation génétique, Polymorphisme génétique, Hétérozygote, Index de sélection, Amélioration des plantes, Marqueur génétique, Participation, Population végétale, approches participatives

Mots-clés géographiques Agrovoc : Bénin

Mots-clés complémentaires : SSR, Recherche participative, AFLP

Classification Agris : F30 - Plant genetics and breeding
E50 - Rural sociology

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

Auteurs et affiliations

  • Lançon Jacques, CIRAD-PERSYST-UPR Systèmes cotonniers (BEN)
  • Pichaut Jean-Philippe
  • Djaboutou Mossibaou, INRAB (BEN)
  • Lewicki-Dhainaut Sylvie, CIRAD-DREI (CMR)
  • Viot Christopher, CIRAD-BIOS-UMR DAP (FRA) ORCID: 0000-0001-6321-4741
  • Lacape Jean-Marc, CIRAD-BIOS-UMR DAP (FRA)

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