Optimizing Hormonal Effects and Incubation Periods on In Vitro Regeneration in High-Yielding Indica Rice

Authors

  • M S Rahman Biotechnology division, Bangladesh Rice research Institute, Gazipur-1701, Bangladesh
  • J Ferdaous Biotechnology division, Bangladesh Rice research Institute, Gazipur-1701, Bangladesh
  • S Jafrin Biotechnology division, Bangladesh Rice research Institute, Gazipur-1701, Bangladesh
  • M E Hoque Biotechnology division, Bangladesh Rice research Institute, Gazipur-1701, Bangladesh
  • M A Hossain Biotechnology division, Bangladesh Rice research Institute, Gazipur-1701, Bangladesh
  • S Sultana Biotechnology division, Bangladesh Rice research Institute, Gazipur-1701, Bangladesh

DOI:

https://doi.org/10.3329/brj.v27i2.77695

Keywords:

Incubation days, Hormone, In vitro, Regeneration, Callus induction

Abstract

The research aimed to evaluate the effects of hormones and callus age on in vitro regeneration as well as seeking to establish a reliable and effective plant regeneration protocol for the rice varieties BRRI dhan92 and BRRI dhan96. Mature seeds were used to initiate callus induction using MS media containing 2 mg/L of 2,4-D. For the regeneration process, calli were transferred to MS medium supplemented with different hormone combinations: H1 (2 mg/L BAP + 1 mg/L NAA + 1 mg/L Kinetin), H2 (4 mg/L BAP + 0.5 mg/L NAA + 1.2 mg/L Kinetin), and H3 (1 mg/L BAP + 1 mg/L NAA + 1 mg/L Kinetin). Significant variations were observed in the response to plant hormones between the rice varieties. Additionally, calli of ten, fifteen, and twenty-one days old were tested to observe the effect of callus age on plant regeneration. The highest callus induction frequency was recorded in BRRI dhan92 (88.17%). The H2 hormone combination showed the highest regeneration frequencies, achieving 63.67% in BRRI dhan92 and 45.33% in BRRI dhan96. Furthermore, the highest regeneration frequencies were found in ten-day-old calli, with BRRI dhan92 at 67.00% and BRRI dhan96 at 49.00%. This optimized regeneration protocol for BRRI dhan92 and BRRI dhan96 can be effectively used for Agrobacterium-mediated genetic transformation and their subsequent improvement.

Bangladesh Rice J. 27(2): 17-24, 2023

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Published

2025-04-27

How to Cite

Rahman, M. S., Ferdaous, J., Jafrin, S., Hoque, M. E., Hossain, M. A., & Sultana, S. (2025). Optimizing Hormonal Effects and Incubation Periods on In Vitro Regeneration in High-Yielding Indica Rice. Bangladesh Rice Journal, 27(2), 17–24. https://doi.org/10.3329/brj.v27i2.77695

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