| |
| Web URL(s): | https://turf.rutgers.edu/research/abstracts/symposium2018.pdf#page=18
Last checked: 06/19/2018
Requires: PDF Reader
Notes: Item is within a single large file; Abstract only |
|---|
| Publication Type:
| Report |
|---|
| Author(s): | Tate, Trent Matthew;
Meyer, William A.;
Bonos, Stacy A.;
McCullough, Patrick E.;
Yu, Jianlin |
|---|
| Author Affiliation: | Tate and Meyer: Department of Plant Biology, Rutgers University; McCullough and Yu: University of Georgia - Griffin |
|---|
| Title: | Breeding fine fescues for increased tolerance to mesotrione |
|---|
| Section: | Plenary presentations
Other records with the "Plenary presentations" Section
|
|---|
| Meeting Info.: | New Brunswick, New Jersey: January 12, 2018 |
|---|
| Source: | Proceedings of the Twenty-Seventh Annual Rutgers Turfgrass Symposium. 2018, p. 17. |
|---|
| Publishing Information: | New Brunswick, New Jersey: The Center for Turfgrass Science, Rutgers, The State University of New Jersey |
|---|
| # of Pages: | 1 |
|---|
| Keywords: | TIC Keywords: Breeding aims; Cool season turfgrasses; Festuca; Festuca rubra subsp. commutata; Low maintenance turfgrass species; Mesotrione
|
|---|
| Trade Names: | Tenacity |
|---|
| Abstract/Contents: | "The fine fescues (Festuca spp.) are a group of cool-season grasses that are better adapted to cool, dry, shaded environments, infertile, acidic soils and drought conditions. They also exhibit the best performance under lower fertility levels than other cool-season turfgrasses. These qualities give them the reputation of being low maintenance grasses. mesotrione (Tenacity) is an HPPD inhibiting herbicide that provides pre- and post-emergent control of many problematic grassy weeds including Poa annua. Currently the Tenacity label does not recommend use in fine fescues at seeding. The Rutgers Turfgrass Breeding program has been working to breed mesotrione tolerant fine fescues by using a recurrent selection breeding strategy so the herbicide can be utilized safely at seeding. In addition to the breeding work, two studies were conducted to better understand the tolerance mechanism of fine fescue to mesotrione. Three experimental selections of each fine fescue species (hard (F. brevipila), Chewings (F. rubra ssp. commutata), strong creeping red (F rubra ssp. rubra)) were used to quantify tolerance levels using a rate titration study and quantify the absorption and translocation levels using 14C radiolabeled mesotrione. In both studies, plants were established from vegetative plugs and kept in a growth chamber maintained at 25/15 °C day/night temperature and 50% humidity and ten hour photoperiod. Herbicide treatments were applied in a spray chamber set to deliver 280 L ha -1 at rates of 0, 17.5, 35, 70, 140, 280, 560, 1121, 2242, 4483, and 8966 grams a.i. ha -1 + 0.25% non ionic surfactant. Visual percent injury was assessed and means separated using Fisher's Protected LSD. Hard fescues were the most tolerant species and strong creeping red fescue the least tolerant species. In addition to the rate titration, the same nine vegetative lines were used in a study to evaluate foliar absorption and translocation of 14C labeled mesotrione herbicide at 24 and 96 hours after treatment (HAT) and the root absorption and translocation of 14C labeled mesotrione herbicide. Foliar absorption and translocation of radioactivity was not associated with differential tolerance levels to mesotrione. Interestingly, the most susceptible lines of Chewings and strong creeping fescue exhibited greater root uptake of 14C-mesotrione more tolerant lines. Our results demonstrate that differences in root absorption contribute to differences tolerance, but there are likely other factors that contribute and further studies are needed to better understand the mechanism of increased tolerance. Overall the breeding of mesotrione tolerance in fine fescues has shown promising improvement for hard and Chewings fescue and with further breeding and testing we should have commercially acceptable resistance levels." |
|---|
| Language: | English |
|---|
| References: | 0 |
|---|
| Note: | This item is an abstract only! |
|---|
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Tate, T. M., W. A. Meyer, S. A. Bonos, P. E. McCullough, and J. Yu. 2018. Breeding fine fescues for increased tolerance to mesotrione. Proc. Rutgers Turfgrass Symp. p. 17. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=298889 |
| If there are problems with this record, send us feedback about record 298889. |
| Choices for finding the above item: |
|---|
| Web URL(s):
https://turf.rutgers.edu/research/abstracts/symposium2018.pdf#page=18
Last checked: 06/19/2018
Requires: PDF Reader
Notes: Item is within a single large file; Abstract only |
| 
MSU catalog number: b3696858 |
| Find from within TIC:
Digitally in TIC by file name: rutsy2018 |
| Request through your local library's inter-library loan service (bring or send a copy of this TGIF record) |
