National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Pearl millet downy mildew, caused by the fungus Sclerospora graminicola, is the most destructive disease of pearl millet present in all production areas. Eight varieties of pearl millet (Pennisetum glaucum (L.) R. Br.) were tested at six locations in Niger, including five INRAN stations (Bengou in the Sudanian zone, Kalapaté, Konni, Tarna, and Magaria in the Sahelian-Sudanian zone) and one farmland location (Toumnia in the Sahelian zone). The main objective of the study was to evaluate the resistance level of these varieties and the virulence of S. graminicola isolates in these locations. The experiment was conducted using a randomized complete block design with three replications. The tested varieties showed different responses to S. graminicola isolates at different locations. The varieties SOSAT-C88 and HKP showed stable resistance in all six locations. Analysis of the resistance-to-sperm ratio (R:S) allowed for the distinction of four groups of Sclerospora graminicola isolates according to their virulence level: Group I – Highly virulent (HV), consisting of the S. graminicola population from Bengou; Group II – Intermediate virulence (MV), comprising the isolates from Kalapaté and Konni; Group III – Intermediate virulence, but less aggressive than the previous low virulence group (V), formed by the isolates from Magaria and Tomnia; and Group IV – Low virulence (LV), composed solely of the Tarna isolate, representing the lowest virulence level. The variety SOSAT-C88 demonstrated stable resistance in all six locations. The Bengou isolate proved to be the most virulent and can be used for screening millet breeding lines for the development of hybrids best adapted to Niger.
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