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La Mineuse de l’Epi de Mil (MEM), Heliocheilus albipunctella De Joannis est un ravageur endemique du mil en zone sahelienne. Elle est responsable de la perte de plus de 60% de la production de cette cereale. Pour l’identification des genotypes resistants ou tolerants a ce ravageur, des tests de criblage de 31 varietes ont ete mis en place au niveau des 3 villages de la region de Maradi en 2016 et 2017 avec un dispositif de parcelles en blocs randomises. L’analyse en composante principale a permis de degager 3 groupes : 1) les varietes precoces et infestees par la MEM ; 2) celles tardives et moins infestees par le ravageur et 3) les genotypes tardifs a haut rendement. Le taux d’infestation des varietes est negativement correle au delai 50% floraison (r = -0,75) et positivement correle a l’importance des degâts du ravageur notamment le nombre des mines (r = 0,97) et la longueur des mines (r = 0,98). La variete Moro avec un delai 50% floraison court de 74 jours, un epi compact et un taux d’infestation de 2,45% a ete identifiee comme resistante. Les varietes CZ-SNY-03-11, Toroniou-HTC, PE00353, PE01490 et PE00077 avec des taux d’infestation variant de 0,89 a 2,76% semblent presenter une pseudo-resistance a la MEM. Ces dernieres ont presente un delai 50% floraison plus long de 87 a 100 jours qui leurs a permis d’echapper a l’infestation du ravageur. La compacite des epis et la longueur du cycle sont apparues comme des caracteres fortement heritables (h² > 89). Les informations obtenues ont revele l’existence des aptitudes a la resistance avec la variete Moro. Les activites de recherche peuvent desormais se focaliser sur la recherche des genes responsables de cette resistance pour une amelioration genetique et dans le cadre d’une lutte integree contre la MEM.Mots cles : Precocite, infestation, compacite, heritabilite, pseudo-resistance. English Title: Screening of millet genotypes Pennisetum glaucum (L.) R. Br. for resistance or tolerance to the mil head miner, Heliocheilus albipunctella De Joannis in Niger The Millet Head Miner (MHM), Heliocheilus albipunctella De Joannis is an endemic pest of millet in the Sahelian zone. It is responsible for the loss of more than 60% yield of this cereal. To identify resistant or tolerant genotypes, screening tests were conducted with 31 varieties in villages of Maradi region in 2016 and 2017 with a randomized block design. Principal component analysis identified 3 groups: 1) early and MHM-infested varieties; 2) late and less infested by the pest; and 3) high yielding late genotypes. Variety infestation rate was negatively correlated with the 50% flowering (r = -0.75) and positively correlated with the importance of the pest damage including the number of mines (r = 0.97) and the length of mines (r = 0.98). The Moro variety with a 50% flowering time of 74 days, a compact panicle and an infestation rate of 2.45% was identified as resistant. Varieties CZ-SNY-03-11, Toroniou-HTC, PE00353, PE01490 and PE00077 with infestation rates ranging from 0.89 to 2.76% appear to have a pseudo-resistance to MHM. These genotypes had 50% longer flowering time of 87 to 100 days which allowed them to escape the pest infestation. The compactness of panicles and the length of the cycle appeared as strongly heritable characters (h²> 89). The information obtained revealed existence of some resistance in the Moro variety. Future activities could focus on finding the genes responsible for this resistance for genetic improvement as part of an integrated control of the MHM.Keywords: Precocity, infestation, compactness, heritability, pseudo-resistance.

international journal of biological and chemical sciences

Evaluation des génotypes de mil &lt;i&gt;Pennisetum glaucum&lt;/i&gt; (L.) R. Br. pour la résistance ou la tolérance à la mineuse de l’épi de mil, &lt;i&gt;Heliocheilus albipunctella&lt;/i&gt; De Joannis au Niger