eprintid: 7503
rev_number: 8
eprint_status: archive
userid: 19
dir: disk0/00/00/75/03
datestamp: 2014-02-11 10:20:27
lastmod: 2014-02-11 10:20:27
status_changed: 2014-02-11 10:20:27
type: article
metadata_visibility: show
contact_email: Library-ICRISAT@cgiar.org
creators_name: Wilson, J P
creators_name: Hess, D E
creators_name: Hanna, W W
icrisatcreators_name: Hess, D E
affiliation: University of Georgia(Tifton)
affiliation: ICRISAT(Bamako)
country: USA
country: Africa
title: Resistance to Striga hermonthica in Wild Accessions of the Primary Gene Pool of Pennisetum glaucum
ispublished: pub
subjects: S1.5
subjects: s1.4
full_text_status: public
abstract: Resistance 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 screening
date: 2000
date_type: published
publication: Phytopathology  
volume: 90
number: 10
publisher: American Phytopathological Society
pagerange: 1169-1172
refereed: TRUE
issn: 0031-949X
official_url: http://dx.doi.org/10.1094/PHYTO.2000.90.10.1169
related_url_url: http://scholar.google.co.in/scholar?as_q=Resistance+to+Striga+hermonthica+in+Wild+Accessions+of+the+Primary+Gene+Pool+of+Pennisetum+glaucum&as_epq=&as_oq=&as_eq=&as_occt=title&as_sauthors=&as_publication=&as_ylo=&as_yhi=&btnG=&hl=en&as_sdt=0%2C5
related_url_type: pub
funders: Funded in part by a USAID-sponsored Initiative on Development of Linkages with International Agricultural Research Centers and the U.S. Department of Energy Grant DE-FG02-93ER20099 
citation:   Wilson, J P and Hess, D E and Hanna, W W  (2000) Resistance to Striga hermonthica in Wild Accessions of the Primary Gene Pool of Pennisetum glaucum.  Phytopathology , 90 (10).  pp. 1169-1172.  ISSN 0031-949X     
document_url: http://oar.icrisat.org/7503/1/Phytopathology_90_10_1169-1172_2000.pdf