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GrainGenes Allele Report: Vrn-A1a (Triticum)

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Allele	Vrn-A1a (Triticum)
Synonym	Other name Vrn1 (Triticum) Pugsley AT (1972) Additional genes inhibiting winter habit in wheat. Euphytica 21:547-552.
Reference	Yan L et al. (2004) Allelic variation at the VRN-1 promoter region in polyploid wheat Theoretical and Applied Genetics 109:1677-1686. [ Show all 10 ]
Gene Class	Response to vernalization (Triticum)
Gene	Vrn-A1 (Triticum)
Germplasm	Hexaploid stock Cadet Roberts DWA and Larson RI (1985) Vernalization and photoperiod responses of selected chromosome substitution lines derived from 'Rescue', 'Cadet' and 'Cypress' wheats. Canadian Journal of Genetics and Cytology 27:586-591. [ Show all 24 ]
Comment	Maps to chromosome arm 5AL (Maistrenko, 1973; Law et al, 1976) GenBank accessions AY616458 + AY616459 (Yan, et al., 2004) Mapping: Vrn-A1 - 7.5 cM - Xwg644-5A (Korzun et al., 1997). Located mid 5A cosegregating with Xcdo504-5A, Xwg644-5A and Xpsr426-5A (Galiba et al., 1995). Vrn-A1 - 0.8 cM - Xbcd450-5A/Xrz395-5A - 4.2 cM - Xpsr426-5A (Kato et al., 1998). Cultivars possessing Vrn-A1a are insensitive to vernalization. Vrn-A1a is epistatic to other genes. According to Roberts & Larson (1985), Vrn-A1a is not always fully dominant and not always epistatic. Kuspira et al. 1986, attributed single gene variation in T. monococcum to the Vrn-A1a locus. Multiple recessive alleles were suggested. Multiple alleles also were reported in Kato et al., (1998), and the dominant allele of Novosibirskaya 67 and the weaker dominant allele of Pirotrix 28 were designated Vrn1a and Vrn1b, respectively.
Probe	Exon7_C/T_Vrn-A1 Vrn-A1b-Marq Vrn-A1_9K0001 Vrn1_new
URL	Vrn-A1a allele at Komugi: Catalogue of Gene Symbols for Wheat
Data Curator	Cooper, Laurel Dec-2020

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