Abstract
IT has been previously reported1.2 that certain wheat varieties (I.P. 165, I.P. 4 and I.P. 52) cultivated in India differ in their response to the vernalization process (pre-sowing cold temp. 6°-8° C. treatment) with reference to the incidence of flowering (ear-emergence) from those of their closely allied relatives of the temperate region. These varieties showed significant earliness in ear-emergence only when vernalized seeds were grown under long-day conditions, that is, when the available light period in the following photo-phase was in the range of 12 hr. or more. Any light period of short-day lengths of less than 12 hr. retarded the same. Similar results were reported by Pal and Murty3 on Indian varieties I.P. 114, I.P. 165 and also on English winter wheats.
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References
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KAR, B. VERNALIZATION OF CROPS CULTIVATED IN INDIA. Nature 157, 811–812 (1946). https://doi.org/10.1038/157811a0
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DOI: https://doi.org/10.1038/157811a0
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