Rayada specialty: The forgotten resource of elite features of rice

A. N.M. Rubaiyath Bin Rahman, Jianhua Zhang*

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

10 Citations (Scopus)


Crop domestication and thereafter gradual selection or directional breeding have narrowed the genetic diversity of elite varieties and even promoted gathering of deleterious mutations in their stress response mechanisms, whereas local ecotypes, landraces and wild relatives still growing on native environment and preferences keep the genetic diversities for features like stress tolerance. Rayada is such an exceptional ecotype, variant of typical deepwater rice, completely endemic to certain areas of Madhumati river tracts of Bangladesh and still shares some features of wild rices. Multiple physiological features of Rayadas are distinctly different from typical deepwater rice. Tolerance to prolonged flood, submergence and cold are special features along with strong photoperiod sensitivity and lack of dormancy. Moreover, longer root system and prompt recovery capacity make it as an elite resource of stress tolerance. However, it has long been neglected because of mainly its long life cycle and poor yield. This review examines the specialty of Rayada rice and the potential use of its unique traits.

Original languageEnglish
Article number41
Number of pages10
Issue number1
Publication statusPublished - 21 Dec 2013

Scopus Subject Areas

  • Agronomy and Crop Science
  • Soil Science
  • Plant Science

User-Defined Keywords

  • Deepwater rice
  • Rayada rice
  • Rice breeding
  • Rice genetics
  • Stress tolerance


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