OAR@ICRISATResistance to Striga hermonthica in Wild Accessions of the Primary Gene Pool of Pennisetum glaucumJ PWilsonauthorD EHessauthorW WHannaauthorResistance to Striga hermonthica in 274 wild Pennisetum glaucum subsp. monodii and stenostachyum accessions was evaluated at Samanko, Mali in 1997 and 1998, and at Cinzana, Mali and Sadoré, Niger in 1998. Data recorded included number of striga plants per plot at least three times during the season, date of striga emergence, number of Pennisetum plants, Pennisetum anthesis date, and downy mildew incidence (caused by Sclerospora graminicola). Across trials, the average maximum number of striga per host plant ranged from 0.9 to 8.3. Average days to striga emergence ranged from 54 to 68 days across trials, and was negatively correlated (P < 0.01) with maximum striga within trials. Days to Pennisetum flowering ranged from 54 to 74 days across trials. Host flowering was correlated (P ≤ 0.05) positively with maximum striga at Samanko in 1997 and 1998, but negatively at Cinzana. Downy mildew incidence ranged from 10 to 32% across trials, and was negatively correlated with maximum striga in three trials. Days to striga emergence and Pennisetum flowering were significant covariates affecting maximum striga values, but downy mildew incidence was not. Least squares means of maximum striga across trials averaged 5.7, and ranged from -0.2 to 19.1 striga per host plant. Broad-sense heritability of observed maximum striga was estimated to be 0.55. Agar-gel assays conducted in the laboratory were ineffective in identifying differences in stimulating striga seed germination among selected accessions. Variables not directly related to genetic resistance can affect maximum striga emergence in the field, and their identification may allow more effective resistance screeningMilletsSorghum2000American Phytopathological SocietyArticle

For work being deposited by its own author: In self-archiving this collection of files and associated bibliographic metadata, I grant OAR@ICRISAT the right to store them and to make them permanently available publicly for free on-line. I declare that this material is my own intellectual property and I understand that OAR@ICRISAT does not assume any responsibility if there is any breach of copyright in distributing these files or metadata. (All authors are urged to prominently assert their copyright on the title page of their work.)

For work being deposited by someone other than its author: I hereby declare that the collection of files and associated bibliographic metadata that I am archiving at OAR@ICRISAT) is in the public domain. If this is not the case, I accept full responsibility for any breach of copyright that distributing these files or metadata may entail.

Clicking on the deposit button indicates your agreement to these terms.