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| DOI: | 10.2135/cropsci2012.02.0085 |
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| Web URL(s): | https://dl.sciencesocieties.org/publications/cs/articles/53/1/240
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| Publication Type:
| Refereed |
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| Author(s): | Zhang, Hongxiang;
McGill, Craig R.;
Irving, Louis J.;
Kemp, Peter D.;
Zhou, Daowei |
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| Author Affiliation: | Zhang and Zhou: Northeast Inst. of Geography and Agroecology, Chinese Academy of Sciences, Changchun, China; McGill and Kemp: Inst. of Natural Resources, Massey Univ., Palmerston North, New Zealand; Irving: Graduate School of Life and Environmental Science, Univ. of Tsukuba, Tsukuba, Ibaraki, Japan |
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| Title: | A modified thermal time model to predict germination rate of ryegrass and tall fescue at constant temperatures |
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| Section: | Seed physiology, production & technology
Other records with the "Seed physiology, production & technology" Section
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| Source: | Crop Science. Vol. 53, No. 1, January 2013, p. 240-249. |
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| Publishing Information: | Madison, Wisconsin: Crop Science Society of America |
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| # of Pages: | 10 |
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| Related Web URL: | https://dl.sciencesocieties.org/publications/cs/abstracts/53/1/240
Last checked: 11/07/2016
Notes: Abstract only
https://dl.sciencesocieties.org/publications/cs/articles/53/1/240?show-t-f=tables&wrapper=no
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Notes: Tables only
https://dl.sciencesocieties.org/publications/cs/articles/53/1/240?show-t-f=figures&wrapper=no
Last checked: 11/07/2016
Notes: Figures only |
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| Keywords: | TIC Keywords: Cultivar evaluation; Festuca arundinacea; Germination; Lolium multiflorum; Lolium perenne; Temperature profile
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| Cultivar Names: | Bronsyn; Archie; Flecha AR 542; Advance |
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| Abstract/Contents: | "The thermal time model is widely used to describe the relationship between germination and temperature. However, the model breaks the germination curve into two parts and ignores the possibility that germination rate is constant at optimal temperatures. The purposes of this study were to investigate the relationship between temperature and germination rate within the context that optimum temperature (To) may be better defined as a range rather than a single point and to test for variation in minimum temperature (Tb) and the thermal time constant of a given subpopulation g at suboptimal temperatures [θ1(g)] among subpopulations. Seeds of two ryegrass cultivars, perennial ryegrass (Lolium perenne L.) 'Bronsyn' and annual ryegrass (Lolium multiflorum Lam.) 'Archie', and two tall fescue cultivars (Festuca arundinacea Schreb.) 'Flecha AR542' and 'Advance' were germinated at constant temperatures ranging from 6 to 43°C at 3°C intervals and monitored for subpopulation variability from the 10th to 80th germination percentiles. Linear regression was used to estimate the parameters of the modified thermal time model at suboptimal, optimal, and supraoptimal temperatures. The tall fescue and ryegrass cultivars all exhibited an To range over which the germination rate was constant, although the magnitude of the To range depended on cultivar and/or species and subpopulations. Therefore, a modified thermal time model incorporating upper limit of optimum temperature range (Tou) and lower limit of optimum temperature range (Tol) was proposed. This modified thermal time model can better predict the germination rate and temperature relationship in some circumstances." |
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| Language: | English |
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| References: | 32 |
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| Note: | Equations
Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Zhang, H., C. R. McGill, L. J. Irving, P. D. Kemp, and D. Zhou. 2013. A modified thermal time model to predict germination rate of ryegrass and tall fescue at constant temperatures. Crop Sci. 53(1):p. 240-249. |
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| DOI: 10.2135/cropsci2012.02.0085 |
| Web URL(s):
https://dl.sciencesocieties.org/publications/cs/articles/53/1/240
Last checked: 11/07/2016
Access conditions: Item is within a limited-access website
https://dl.sciencesocieties.org/publications/cs/pdfs/53/1/240
Last checked: 11/07/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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MSU catalog number: b2211522a |
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