Ecogeographic factors aff ecting infl orescence emergence of cool-season forage grasses

Marvin H. Hall, J. M. Dillon, D. J. Undersander, T. M. Wood, P. W. Holman, D. H. Min, R. H. Leep, G. D. Lacefield, H. T. Kunelius, P. R. Peterson, N. J. Ehlke

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The ability to predict when a cool-season forage grass cultivar will begin infl orescence emergence under different ecogeographical conditions would allow plant breeders, agronomists, and grass-seed marketers to better position that cultivar into a forage production system. Our objective was to determine the ecogeographical factors (longitude, latitude, elevation, day of year when average daily temperature exceeds 0°C for fi ve consecutive days [DOY at 0°C], cumulative growing degree-day [GDD], photoperiod, and cumulative photosynthetic active radiation [PAR]) that have the greatest effect on grass maturation in the spring. Infl orescence emergence was monitored in established cultivars of festulolium (× Festulolium spp.), orchardgrass (Dactylis glomerata L.), ryegrass (Lolium perenne L. and Lolium multifl orum Lam.), tall fescue (Festuca arundinacea Schreb.), and timothy (Phleum pratense L.) at eight locations in North America during the spring of 2004 and 2005. As latitude increased, the day of year when grasses reached 1% infl orescence emergence (DOY) also increased, while cumulative GDD and PAR decreased. Latitude, cumulative PAR, and DOY at 0°C were more closely correlated (r 2 ≥ 0.67) to the onset of infl orescence emergence than the other variables. Latitude combined with the inverse transformation of PAR provided the best prediction of when these grasses would initiate infl orescence emergence (validation R2 for all species ≥ 0.83).

Original languageEnglish (US)
Pages (from-to)1109-1115
Number of pages7
JournalCrop Science
Volume49
Issue number3
DOIs
StatePublished - May 1 2009

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cool season grasses
forage grasses
photosynthetically active radiation
Festulolium
Dactylis glomerata
Festuca arundinacea
grasses
Lolium
heat sums
cultivars
agronomists
grass seed
Phleum pratense
plant breeders
forage production
longitude
Lolium perenne
production technology
photoperiod
prediction

All Science Journal Classification (ASJC) codes

  • Agronomy and Crop Science

Cite this

Hall, M. H., Dillon, J. M., Undersander, D. J., Wood, T. M., Holman, P. W., Min, D. H., ... Ehlke, N. J. (2009). Ecogeographic factors aff ecting infl orescence emergence of cool-season forage grasses. Crop Science, 49(3), 1109-1115. https://doi.org/10.2135/cropsci2008.07.0394
Hall, Marvin H. ; Dillon, J. M. ; Undersander, D. J. ; Wood, T. M. ; Holman, P. W. ; Min, D. H. ; Leep, R. H. ; Lacefield, G. D. ; Kunelius, H. T. ; Peterson, P. R. ; Ehlke, N. J. / Ecogeographic factors aff ecting infl orescence emergence of cool-season forage grasses. In: Crop Science. 2009 ; Vol. 49, No. 3. pp. 1109-1115.
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Hall, MH, Dillon, JM, Undersander, DJ, Wood, TM, Holman, PW, Min, DH, Leep, RH, Lacefield, GD, Kunelius, HT, Peterson, PR & Ehlke, NJ 2009, 'Ecogeographic factors aff ecting infl orescence emergence of cool-season forage grasses', Crop Science, vol. 49, no. 3, pp. 1109-1115. https://doi.org/10.2135/cropsci2008.07.0394

Ecogeographic factors aff ecting infl orescence emergence of cool-season forage grasses. / Hall, Marvin H.; Dillon, J. M.; Undersander, D. J.; Wood, T. M.; Holman, P. W.; Min, D. H.; Leep, R. H.; Lacefield, G. D.; Kunelius, H. T.; Peterson, P. R.; Ehlke, N. J.

In: Crop Science, Vol. 49, No. 3, 01.05.2009, p. 1109-1115.

Research output: Contribution to journalArticle

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AU - Hall, Marvin H.

AU - Dillon, J. M.

AU - Undersander, D. J.

AU - Wood, T. M.

AU - Holman, P. W.

AU - Min, D. H.

AU - Leep, R. H.

AU - Lacefield, G. D.

AU - Kunelius, H. T.

AU - Peterson, P. R.

AU - Ehlke, N. J.

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N2 - The ability to predict when a cool-season forage grass cultivar will begin infl orescence emergence under different ecogeographical conditions would allow plant breeders, agronomists, and grass-seed marketers to better position that cultivar into a forage production system. Our objective was to determine the ecogeographical factors (longitude, latitude, elevation, day of year when average daily temperature exceeds 0°C for fi ve consecutive days [DOY at 0°C], cumulative growing degree-day [GDD], photoperiod, and cumulative photosynthetic active radiation [PAR]) that have the greatest effect on grass maturation in the spring. Infl orescence emergence was monitored in established cultivars of festulolium (× Festulolium spp.), orchardgrass (Dactylis glomerata L.), ryegrass (Lolium perenne L. and Lolium multifl orum Lam.), tall fescue (Festuca arundinacea Schreb.), and timothy (Phleum pratense L.) at eight locations in North America during the spring of 2004 and 2005. As latitude increased, the day of year when grasses reached 1% infl orescence emergence (DOY) also increased, while cumulative GDD and PAR decreased. Latitude, cumulative PAR, and DOY at 0°C were more closely correlated (r 2 ≥ 0.67) to the onset of infl orescence emergence than the other variables. Latitude combined with the inverse transformation of PAR provided the best prediction of when these grasses would initiate infl orescence emergence (validation R2 for all species ≥ 0.83).

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Hall MH, Dillon JM, Undersander DJ, Wood TM, Holman PW, Min DH et al. Ecogeographic factors aff ecting infl orescence emergence of cool-season forage grasses. Crop Science. 2009 May 1;49(3):1109-1115. https://doi.org/10.2135/cropsci2008.07.0394