Responses of wheat to vernalization and photoperiod

Davidson, J.L. and Christian, K.R. and Jones, D.B. and Bremner , P.M. (1985) Responses of wheat to vernalization and photoperiod. Australian Journal of Agricultural Research , 36 (3). pp. 347-359.

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The effects of vernalization and photoperiod on times from planting of seedlings to ear emergence were measured in 68 Australian and 49 overseas varieties of wheat, comprising a broad spectrum of genetic material, in a glasshouse in Canberra (latitude 35¦S). Vernalization was carried out by growing germinated seedlings in the dark at 1-2¦C for 6 weeks. Long photoperiods (16 h) separated unvernalized plants into two distinct groups, corresponding to commonly recognized spring and winter types. Responses to vernalization were generally small under natural photoperiods (11-15 h), but much more pronounced in long photoperiods, particularly with winter wheats. In a second experiment, 24 varieties of wheat gave widely different responses to vernalization treatments. With 8 weeks' vernalization and long photoperiods, all varieties reached ear emergence within 66 days, but in some winter wheats 4 weeks treatment had little effect and 6 weeks gave incomplete vernalization. Under the conditions of these experiments, Australian wheats showed a wide range of responses to photoperiod and a narrow range of responses to vernalization compared with overseas varieties. The need to investigate the control of flowering time in obtaining varieties suited to the high-rainfall zone of Australia is discussed

Item Type: Article
Author Affiliation: Division of Plant Industry, CSIRO, P.O. Box 1600, Canberra City, A.C.T. 2601
Subjects: Plant Protection
Divisions: Other Crops
Depositing User: Mr. SanatKumar Behera
Date Deposited: 10 Mar 2012 10:59
Last Modified: 10 Mar 2012 10:59
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