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

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 l...

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Bibliographic Details
Published inEuphytica Vol. 214; no. 1; pp. 1 - 12
Main Authors Koyama, Kayo, Okumura, Yurika, Okamoto, Emi, Nishijima, Ryo, Takumi, Shigeo
Format Journal Article
LanguageEnglish
Published Dordrecht Springer Netherlands 01.01.2018
Springer
Springer Nature B.V
Subjects
Aegilops tauschii
Agronomy
Biodiversity
Biomedical and Life Sciences
Biotechnology
Flowering
Flowers & plants
Gene expression
Gene loci
Gene mapping
Genetic research
Genomes
Genomics
Goat grass
Life Sciences
Mutation
Plant Genetics and Genomics
Plant Pathology
Plant Physiology
Plant Sciences
Quantitative genetics
Quantitative trait loci
Triticum
Vernalization
Wheat
Photoperiod sensitivity
Natural variation
Quantitative trait locus
Flowering time
Wheat
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Summary: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 F 2 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.
ISSN:0014-2336
1573-5060
DOI:10.1007/s10681-017-2089-8