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| Web URL(s): | http://archive.lib.msu.edu/tic/rpr/2000/72154,%20U%20Kentucky,%20Farman.PDF
Last checked: 02/08/2013
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Material Type: | Manuscript |
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| Monographic Author(s): | Farman, Mark; Phillips, Tim; Williams, David |
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| Author Affiliation: | Farman: Department of Plant Pathology; and Phillips and Williams: Department of Agronomy, University of Kentucky |
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| Monograph Title: | Development of Gray Leaf Spot Resistant Perennial Ryegrass through Breeding and Biotechnological Approaches: Progress Report: Fall, 2000, 2000. |
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| Publishing Information: | [Lexington, Kentucky]: University of Kentucky |
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| # of Pages: | 7 |
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| Collation: | [7] pp. |
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| Abstract/Contents: | "We are using two approaches to try and obtain perennial ryegrass plants that are resistant to infection by the gray leaf spot pathogen Pyricularia grisea. The first approach is based on the observations that strains of the fungus causing gray leaf spot of perennial ryegrass are unable to cause disease on rice. This suggested that rice may have disease resistance genes which recognize gray leaf spot strains , enabling it to resist infection. Introduction of such genes into perennial ryegrass may enable the grass to mount a defense to gray leaf spot pathogens. Work performed in the first 8 months of the USGA-funded project has shown that one variety of rice called CO39 is resistant to gray leaf spot because the fungus possesses a gene whose presence elicits a defense response in the host. Moreover, this defense response is controlled by a resistance gene that has been well characterized. We hope to introduce this resistance gene into perennial ryegrass within the duration of the project to determine if it will function to provide gray leaf resistance to this host plant. The other approach we are taking is traditional breeding. Prior to starting this project, we had identified an annual ryegrass x tall fescue hybrid with high levels of resistance to gray leaf spot. This hybrid was crossed with both perennial ryegrass and tall fescue and a small amount of seed was obtained from each cross. During the psat 8 months, we have used inoculation tests to examine gray leaf spot resistance in the progeny from these crosses. We have found that resistance was not transmitted to any of the progeny of a cross between the hybrid and perennial ryegrass. However, resistant progeny were identified when the hybrid was crossed with tall fescue. In the spring of 2001, we will attempt to introduce the hybrid's resistance into perennial ryegrass by performing additional crosses and by screening much larger numbers of progeny. We will also explore the possibility of introducting resistance into perennial ryegrass by using tall fescue as an intermediary." |
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| Language: | English |
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| References: | 3 |
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| See Also: | See also related summary article, "Development of gray leaf spot resistant perennial ryegrass through breeding and biotechnological approaches", 2000 Turfgrass and Environmental Research Summary [USGA], 2000, p. 52, R=72154. R=72154 |
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| Note: | Pictures, b/w
Tables
"Progress Report: Fall, 2000"
Also appears as pp. 613-619 in the USGA Turfgrass Research Committee Reporting Binders. |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
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Last checked: 02/08/2013
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