A Farmer’s Approach to Detecting Photoperiod Sensitivity in Rice (Oryza sativa ssp. indica) Landraces

Authors

  • Debal Deb

    Centre for Interdisciplinary Studies, Kolkata, 700075, India

DOI:

https://doi.org/10.30564/jbr.v5i3.5737
Received: 20 May 2023 | Revised: 4 July 2023 | Accepted: 7 July 2023 | Published Online: 13 July 2023

Abstract

Most indigenous rice landraces are sensitive to photoperiod during short day seasons, and this sensitivity is more pronounced in indica than in japonica landraces. Attempts to identify photoperiod sensitive (PPS) cultivars based on the life history stages of the rice plant, and several models and indices based on phenology and day length have not been precise, and in some cases yield counterfactual inferences. Following the empirical method of traditional Asian rice farmers, the author has developed a robust index, based on the sowing and flowering dates of a large number of landraces grown in different seasons from 2020 to 2023, to contradistinguish PPS from photoperiod insensitive cultivars. Unlike other indices and models of photoperiod sensitivity, the index does not require the presumed duration of different life history stages of the rice plant but relies only on the flowering dates and the number of days till flowering of a rice cultivar sown on different dates to consistently identify photoperiod sensitive cultivars.

Keywords:

Aman; Aus; Boro; Flowering; Landraces; Photoperiod sensitivity; Rice (Oryza sativa L.)

References

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How to Cite

Deb, D. (2023). A Farmer’s Approach to Detecting Photoperiod Sensitivity in Rice (Oryza sativa ssp. indica) Landraces. Journal of Botanical Research, 5(3), 60–66. https://doi.org/10.30564/jbr.v5i3.5737

Issue

Vol. 5 , Iss. 3 (July 2023)

Article Type

Article

License

Copyright © 2023 Author(s)

Creative Commons License

This is an open access article under the Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) License.

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