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| Web URL(s): | http://turf.rutgers.edu/research/abstracts/symposium2007.pdf#page=41
Last checked: 11/28/2007
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Bonos, Stacy A.;
Weibel, Eric N. |
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| Author Affiliation: | Department of Plant Biology and Pathology, Rutgers University |
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| Title: | The identification of brown patch resistance in colonial bentgrass |
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| Section: | Poster presentations
Other records with the "Poster presentations" Section
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| Meeting Info.: | Cook College, Rutgers, NJ: January 11-12, 2007 |
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| Source: | Proceedings of the Sixteenth Annual Rutgers Turfgrass Symposium. Vol. 16, 2007, p. 40. |
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| Publishing Information: | New Brunswick, NJ: Center for Turfgrass Science, Cook College, Rutgers, The State University of New Jersey |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Brown patch; Disease resistance; Rhizoctonia solani; Agrostis tenuis; Inheritance; Breeding; Identification; Disease susceptibility
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| Abstract/Contents: | "Brown patch, caused by the fungus Rhizoctonia solani, is one of the greatest factors limiting the wide-spread use of colonial bentgrass (Agrostis capillaris) on golf course fairways in temperate regions of the US. The objectives of this study were to 1) determine the narrow-sense heritability of brown patch resistance in colonial bentgrass from half-sib families and controlled crosses between tolerant and susceptible bentgrass clones and 2) identify colonial bentgrass germplasm with brown patch resistance. Parental clones and progenies from half-sib families or crosses were established in field trials using a randomized complete block design with four replications and inoculated with one isolate of R. solani applied at a rate of 0.25 g m-2 of prepared inoculum. Brown patch disease severity of parents and progeny was evaluated on a 1-9 scale for two years. Narrow-sense heritability was calculated from one-parent regression analysis for the half-sib families or mid-parent progeny regression for the controlled crosses. Colonial bentgrass clones exhibiting less brown patch disease from these spaced-plant trials were identified and used to develop experimental selections of colonial bentgrass. These were compared to standard cultivars in a replicated field trial established in 2004. Narrow-sense heritability ranged from 0.70-0.75 for one half-sib family and 0.84 for the controlled crosses. However, brown patch resistance was not heritable in the other half-sib family evaluated. Additionally, susceptible parents were not significantly more susceptible than resistant parents when evaluated in a replicated field trial and resistant x resistant crosses were not more resistant than resistant x susceptible crosses. These results are contrary to previous results reported for dollar spot resistance in creeping bentgrass. However, similar to dollar spot resistance in creeping bentgrass, experimental selections of colonial bentgrass exhibited significantly less brown patch disease compared to standard cultivars. This research indicates that breeding for improved resistance to brown patch in colonial bentgrass should be possible, at least in some populations, although, future research is needed to further discern the genetic mechanism of brown patch resistance in colonial bentgrass. This information is useful for future breeding efforts and could result in increased utilization of this species for turfgrass." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Bonos, S. A., and E. N. Weibel. 2007. The identification of brown patch resistance in colonial bentgrass. Proc. Annu. Rutgers Turfgrass Symp. 16:p. 40. |
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| Web URL(s):
http://turf.rutgers.edu/research/abstracts/symposium2007.pdf#page=41
Last checked: 11/28/2007
Requires: PDF Reader |
| 
MSU catalog number: SB 433 .R88 |
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Digitally in TIC by file name: rutsy2007 |
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