Euphytica

, Volume 165, Issue 3, pp 459–470

Cold tolerance at the early growth stage in wild and cultivated rice

  • Akhil Ranjan Baruah
  • Noriko Ishigo-Oka
  • Mieko Adachi
  • Yasuyo Oguma
  • Yoshiro Tokizono
  • Kazumitsu Onishi
  • Yoshio Sano
Article

DOI: 10.1007/s10681-008-9753-y

Cite this article as:
Baruah, A.R., Ishigo-Oka, N., Adachi, M. et al. Euphytica (2009) 165: 459. doi:10.1007/s10681-008-9753-y

Abstract

The present study was conducted to understand the pattern of variation and the genetic bases for cold tolerance at the early growth stage in Asian rice. The genetic variation was investigated at the germination, plumule and seedling stages among 57 strains including cultivated rice (Oryza sativa ssp. indica and ssp. japonica) and its wild progenitor (Oryza rufipogon). The significant differentiation of cold tolerance was observed among the taxonomically divided groups. At the germination stage, both indica and japonica subspecies tended to be more tolerant than O. rufipogon, whereas at the plumule and seedling stages, ssp. japonica tended to be more tolerant than ssp. indica and O. rufipogon. Furthermore, in cold tolerance at the plumule stage, the clinal variation across the latitude of origins was observed within O. rufipogon and ssp. japonica, suggesting that the current pattern of variation seems to have been shaped by both their phylogenetic histories and on-going adaptation to the local environments. QTL analysis between O. sativa ssp. japonica (tolerant) and O. rufipogon (susceptible) revealed five putative QTLs for cold tolerance at the plumule and seedling stages but not at the germination stage. Substitution mapping was also carried out to precisely locate the two major QTLs for cold tolerance at the plumule stage, which could be used for improvement of tolerance to cold stress in ssp. indica.

Keywords

Cold tolerance Early growth stage Latitudinal cline Oryza rufipogon O. sativa QTL 

Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  • Akhil Ranjan Baruah
    • 1
  • Noriko Ishigo-Oka
    • 1
  • Mieko Adachi
    • 1
  • Yasuyo Oguma
    • 1
  • Yoshiro Tokizono
    • 1
  • Kazumitsu Onishi
    • 1
  • Yoshio Sano
    • 1
  1. 1.Laboratory of Plant Breeding, Department of Applied Science, Research Faculty of AgricultureHokkaido UniversitySapporoJapan

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