HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in ISI Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (5) Citing Articles via Google Scholar Google Scholar Articles by Kamala, V. Articles by Rao, D. M. Search for Related Content PubMed Articles by Kamala, V. Articles by Rao, D. M. Agricola Articles by Kamala, V. Articles by Rao, D. M. Related Collections Sorghum

PLANT GENETIC RESOURCES

Sources of Resistance to Downy Mildew in Wild and Weedy Sorghums

^a National Bureau of Plant Genetic Resources, Regional Station, Rajendranagar, Hyderabad 500 030, Andhra Pradesh, India
^b Genetic Resources and Enhancement Programme, ICRISAT, Patancheru 502 324, Andhra Pradesh, India
^c Dep. of Genetics, Osmania Univ., Hyderabad 500 007, Andhra Pradesh, India

* Corresponding author (P.Bramel{at}CGIAR.ORG)

Sorghum downy mildew (SDM), caused by Peronosclerospora sorghi Weston and Uppal (Shaw), is a serious disease of sorghum [Sorghum bicolor (L.) Moench] and maize (Zea mays L.). The wild relatives of sorghum, both cross compatible and cross incompatible with S. bicolor, could provide alternate sources of resistance genes for the long-term control of SDM. The objective of this study was to assess the downy mildew reaction of several taxa of wild and weedy sorghums. One hundred three wild and weedy sorghums, and six cultivated types belonging to five sections, representing 17 species, originating from Asia, Australia, Africa, and the USA, were greenhouse tested for downy mildew resistance during the rainy seasons of 1998 and 1999 at ICRISAT, Patancheru, India. Forty-five accessions comprising 15 species from four sections, parasorghum, heterosorghum (S. laxiflorum Bailey), chaetosorghum (S. macrospermum Garber), and stiposorghum (S. angustum S. T. Blake, S. ecarinatum Lazarides, S. extans Lazarides, S. intrans F. Muell. ex Benth., S. interjectum Lazarides, S. stipoideum (Ewart & Jean White) C. Gardener & C. E. Hubb.), including all accessions from Australia, exhibited immunity to downy mildew. Cultivated types and wild races of section Sorghum showed the greatest susceptibility (mean downy mildew infection of 62 and 46%, respectively), while accessions of S. halepense (L.) Pers. were comparatively less susceptible (36% mean downy mildew infection). Potential new sources of resistance genes from wild and weedy sorghums were identified that could be used to develop resistant cultivars to control downy mildew.

This article has been cited by other articles:

				S. L. Dillon, F. M. Shapter, R. J. Henry, G. Cordeiro, L. Izquierdo, and L. S. Lee Domestication to Crop Improvement: Genetic Resources for Sorghum and Saccharum (Andropogoneae) Ann. Bot., October 1, 2007; 100(5): 975 - 989. [Abstract] [Full Text] [PDF]

				H. J. Price, G. L. Hodnett, B. L. Burson, S. L. Dillon, D. M. Stelly, and W. L. Rooney Genotype Dependent Interspecific Hybridization of Sorghum bicolor Crop Sci., November 21, 2006; 46(6): 2617 - 2622. [Abstract] [Full Text] [PDF]

				G. L. Hodnett, B. L. Burson, W. L. Rooney, S. L. Dillon, and H. J. Price Pollen-Pistil Interactions Result in Reproductive Isolation between Sorghum bicolor and Divergent Sorghum Species Crop Sci., May 27, 2005; 45(4): 1403 - 1409. [Abstract] [Full Text] [PDF]