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Euphytica

, 214:3 | Cite as

Natural variation in photoperiodic flowering pathway and identification of photoperiod-insensitive accessions in wild wheat, Aegilops tauschii

  • Kayo Koyama
  • Yurika Okumura
  • Emi Okamoto
  • Ryo Nishijima
  • Shigeo Takumi
Article
  • 264 Downloads

Abstract

The D-genome progenitor of hexaploid wheat, Aegilops tauschii Coss., has a wide natural species range in central Eurasia and possesses wide natural variation in heading and flowering time. Here, we report identification of two Ae. tauschii accessions insensitive to short day length. Similarly to a loss or reduced degree of vernalization requirement, the photoperiod-insensitive mutations were found only in the early flowering sublineage (TauL1b) of Ae. tauschii. Quantitative trait locus (QTL) analyses using two F2 mapping populations showed that a QTL for heading time on the long arm of chromosome 5D was related to the early heading phenotype of the photoperiod-insensitive accessions under short-day conditions. In the photoperiod-insensitive accession, expression patterns of two flowering-related genes were altered under short-day conditions compared with the patterns in photoperiod-sensitive accessions. This study indicates that analysis of natural variations in the Ae. tauschii population is useful to find novel genetic loci controlling agronomically important traits.

Keywords

Flowering time Natural variation Photoperiod sensitivity Quantitative trait locus Wheat 

Notes

Acknowledgements

This work was financially supported by Grants from the Ministry of Education, Culture, Sports, Science and Technology of Japan (Grants-in-Aid for Scientific Research (B) Nos. 21380005 and 16H04862).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

10681_2017_2089_MOESM1_ESM.docx (2.9 mb)
Supplementary material 1 (DOCX 3006 kb)

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Copyright information

© Springer Science+Business Media B.V., part of Springer Nature 2017

Authors and Affiliations

  1. 1.Graduate School of Agricultural ScienceKobe UniversityKobeJapan

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