La lutte génétique contre la cécidomyie du sorgho, Stenodiplosis sorghicola au Burkina Faso.

Cahiers Agricultures (Impact Factor: 0.26). 01/2005; 2:201-208.


Faso <> 2 Centre de coopération internationale en recherche agronomique pour le développement (Cirad)-Centro internacional de agricultura tropical (Ciat), LM 172, Managua, Nicaragua <> Résumé La cécidomyie du sorgho, Stenodiplosis (= Contarinia) sorghicola (Coquillet, 1898) est un important ravageur du sorgho dans les zones centre-ouest et est du Burkina Faso. Des études menées de 1994 à 2001 ont abouti à l'identification de dix nouvelles sources de résistance au sein du matériel végétal local. Des croisements impliquant des sources exotiques de résistance et des variétés performantes adaptées ont permis d'obtenir une gamme importante de nouvelles lignées. Testées en milieu paysan, deux lignées avan-cées, CCAL 1/13-1-1-1 et BF 94-6/11-1K-1K se sont révélées prometteuses car associant résistance à la cécidomyie, tolérance à d'autres contraintes biotiques (punaises des panicules et moisissures des grains) à des gains de rendement élevés par rapport aux variétés locales des paysans (140 % pour la CCAL 1/13-1-1-1 et 39 % pour BF 94-6/11-1K-1K en 2000 et 2001). Ces résultats apportent des solutions concrètes à la gestion des populations de cet important ravageur du sorgho pour un accroissement de la production dans les zones concernées. Mots clés : Productions végétales ; Ressources naturelles et environnement.

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    • "A complete description of the two breeding schemes developed from the PCR-1 and PCR-2 populations was given by Trouche et al. (2011). The third breeding scheme, identified as CIR-6, was developed from a single cross made between a well-adapted local cultivar, Sorgo Ligero, and an improved inbred line developed in Burkina Faso, BF 94-6/11-1K-1K, selected for giving short plant type and enhanced fodder quality, as well as midge resistance (Dakouo et al., 2005). Table 2 summarizes the history and the general design of all three breeding scheme studied. "
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