Variability for freezing tolerance among 42 ecotypes of green-type annual bluegrass

Julie Dionne, Sophie Rochefort, David Robert Huff, Yves Desjardins, Annick Bertrand, Yves Castonguay

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Limited information exists on the extent of genetic variability for freezing tolerance among perennial biotypes of annual bluegrass (Poa annua L.) that evolved under golf greens management. We characterized the freezing tolerance of 42 ecotypes collected across the United States and in Quebec using plants hardened to low temperatures during fall and winter. We subsequently analyzed cold-induced biochemical changes in a subset of ecotypes with varied levels of tolerance. There was a large variability among ecotypes for freezing tolerance expressed as the lethal temperature for 50% of the plants (LT50) with values ranging from <-27.0 to -17.0°C. Variation was observed between ecotypes originating from the same region and even the same golf course. Ecotypes from Quebec-better insulated from extreme subfreezing temperatures by reliable and abundant snow cover-developed less freezing tolerance than those evolving under milder winter climates. Signifi cant differences in the concentrations of specifi c amino acids and carbohydrates were observed among ecotypes. Only fructans of high molecular weight, however, were significantly correlated with freezing tolerance and accounted for as much as 50% of the LT50 variance. A 26-kDa polypeptide that markedly accumulated in cold acclimated crowns was more abundant in plants from Quebec. Extensive genetic variability for freezing tolerance among perennial biotypes of annual blue grass can thus be exploited to mitigate winter damage to golf greens.

Original languageEnglish (US)
Pages (from-to)321-336
Number of pages16
JournalCrop Science
Volume50
Issue number1
DOIs
StatePublished - Jan 2010

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Poa annua
ecotypes
cold tolerance
golf courses
Quebec
biotypes
winter
genetic variation
temperature
root crown
fructans
snowpack
polypeptides
molecular weight
grasses
carbohydrates
climate
amino acids

All Science Journal Classification (ASJC) codes

  • Agronomy and Crop Science

Cite this

Dionne, J., Rochefort, S., Huff, D. R., Desjardins, Y., Bertrand, A., & Castonguay, Y. (2010). Variability for freezing tolerance among 42 ecotypes of green-type annual bluegrass. Crop Science, 50(1), 321-336. https://doi.org/10.2135/cropsci2008.12.0712
Dionne, Julie ; Rochefort, Sophie ; Huff, David Robert ; Desjardins, Yves ; Bertrand, Annick ; Castonguay, Yves. / Variability for freezing tolerance among 42 ecotypes of green-type annual bluegrass. In: Crop Science. 2010 ; Vol. 50, No. 1. pp. 321-336.
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Dionne, J, Rochefort, S, Huff, DR, Desjardins, Y, Bertrand, A & Castonguay, Y 2010, 'Variability for freezing tolerance among 42 ecotypes of green-type annual bluegrass', Crop Science, vol. 50, no. 1, pp. 321-336. https://doi.org/10.2135/cropsci2008.12.0712

Variability for freezing tolerance among 42 ecotypes of green-type annual bluegrass. / Dionne, Julie; Rochefort, Sophie; Huff, David Robert; Desjardins, Yves; Bertrand, Annick; Castonguay, Yves.

In: Crop Science, Vol. 50, No. 1, 01.2010, p. 321-336.

Research output: Contribution to journalArticle

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