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GrainGenes Allele Report: Vrn-B1a (Triticum)
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Allele
Vrn-B1a (Triticum)

Reference

Fu D et al. (2005) Large deletions within the first intron in VRN-1 are associated with spring growth habit in barley and wheat. Molecular Genetics and Genomics 273:54-65.

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Gene Class
Response to vernalization (Triticum)

Gene
Vrn-B1 (Triticum)

Germplasm
Hexaploid stock BERSEE
Hoogendoorn J (1985) A reciprocal F1 monosomic analysis of the genetic control of the time of ear emergence, number of leaves and number of spikelets in wheat (Triticum aestivum L.). Euphytica 34:545-558.

[ Show all 29 ]

Comment
GenBank AY74603.1 (Santra et al., 2009)
When mapped as a QTL, Vrn-B1 showed closest association with Xgwm408-5B (Leonova et al., 2003). All common wheat genotypes carrying Vrn-B1a studied so far have a 6.8 kb deletion in intron 1 (Triple Dirk B, Bersee, Festiguay, Mara, Milturum, Noe, Spica) (Fu et al., 2005). Two variants of Vrn-B1a were distinguished. Carriers of an earlier designated Vrn2b (characterized by Diamant 18/Skorospelka 35 5A) showed accelerated flowering after 15 and 30 days of vernalization, whereas carriers of Vrn-2a, (characterized by Ank-18 and Saratovskaya 298/Mironovskaya 808 5A) did not respond to these periods of vernalization (Maystrenko, 1987; 1992).
A dCAPS marker derived from Xwg644-5B was 1.7 cM from Vrn-B1 (Iwaki et al., 2002).
Mapping: Vrn-B1a - 1.6cM - Xwg644-5B - 2.5 cM - Xgwm408-5B (Kato, 2003) and was closely linked to Xgwm408-5B in Diamant I*/Mironovskaya 808 5A//Bezostaya 1 (Leonova et al., 2003). A close association of Vrn-B1 with Xcdo1326-5B was reported in (Shindo et al., 2003).

Probe
Vrn-B1_A
Vrn-B1_B

URL
Vrn-B1a allele at Komugi: Catalogue of Gene Symbols for Wheat

Data Curator
Cooper, Laurel Jan-2021

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