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Rayada specialty: the forgotten resource of elite features of rice

Authors :
Jianhua Zhang
A. N. M. Rubaiyath Bin Rahman
Source :
Rice
Publication Year :
2013
Publisher :
Springer Science and Business Media LLC, 2013.

Abstract

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.

Details

ISSN :
19398433 and 19398425
Volume :
6
Database :
OpenAIRE
Journal :
Rice
Accession number :
edsair.doi.dedup.....13c02513f8df97cb2d33809307cdcae5
Full Text :
https://doi.org/10.1186/1939-8433-6-41