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Variation of freezing tolerance, Cor / Lea gene expression and vernalization requirement in Japanese common wheat
Author(s) -
Ishibashi M.,
Kobayashi F.,
Nakamura J.,
Murai K.,
Takumi S.
Publication year - 2007
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/j.1439-0523.2007.01390.x
Subject(s) - vernalization , biology , allele , genetics , gene , common wheat , cultivar , genotype , freezing tolerance , habit , genome , botany , chromosome , psychology , psychotherapist
Freezing tolerance and vernalization requirement are important traits for adaptation of wheat to growing in a high‐latitude area. Fr‐1 and Vrn‐1 , tightly linked on homoeologous group 5 chromosomes, are major loci for controlling the freezing tolerance and vernalization requirement, respectively. It was previously supposed that winter‐habit wheat should possess a winter‐type Fr‐1 allele guaranteeing winter survival, but that such allele is unnecessary for spring‐habit cultivars. To clarify such allelic linkage between the Vrn‐1 and Fr‐1 loci in the D genome, we studied freezing tolerance and vernalization requirement, and compared cold‐responsive expression patterns of Cor (cold responsive)/ Lea (late‐embryogenesis‐abundant), their putative transcription factor genes and three Vrn‐1 homoeologs in Japanese common wheat cultivars. Wide variation of freezing tolerance and two alleles of Vrn‐D1 were observed in the Japanese cultivars, whereas the accumulation levels of the Cor / Lea transcripts were not be correlated with the levels of freezing tolerance. The allelic linkage between Vrn‐1 and Fr‐1 loci well known in the A genome was not observed in the D genome of Japanese cultivars possessing Vrn‐D1 or vrn‐D1 allele.