Characterization of new allele influencing flowering time in bread wheat introgressed from Triticum militinae

New Biotechnology
Zuzana IvaničováMiroslav Valárik

Abstract

Flowering time variation was identified within a mapping population of doubled haploid lines developed from a cross between the introgressive line 8.1 and spring bread wheat cv. Tähti. The line 8.1 carried introgressions from tetraploid Triticum militinae in the cv. Tähti genetic background on chromosomes 1A, 2A, 4A, 5A, 7A, 1B and 5B. The most significant QTL for the flowering time variation was identified within the introgressed region on chromosome 5A and its largest effect was associated with the VRN-A1 locus, accounting for up to 70% of phenotypic variance. The allele of T. militinae origin was designated as VRN-A1f-like. The effect of the VRN-A1f-like allele was verified in two other mapping populations. QTL analysis identified that in cv. Tähti and cv. Mooni genetic background, VRN-A1f-like allele incurred a delay of 1.9-18.6 days in flowering time, depending on growing conditions. Sequence comparison of the VRN-A1f-like and VRN-A1a alleles from the parental lines of the mapping populations revealed major mutations in the promoter region as well as in the first intron, including insertion of a MITE element and a large deletion. The sequence variation allowed construction of specific diagnostic PCR markers for VRN-A1f-lik...Continue Reading

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Citations

Nov 17, 2017·BMC Plant Biology·Andrey B Shcherban, Elena A Salina
Aug 20, 2019·BMC Plant Biology·Laxman AdhikariAli M Missaoui
Jan 21, 2017·BMC Plant Biology·Irina KonopatskaiaNikolay P Goncharov
Jul 12, 2017·Genetics and Molecular Biology·Yu LinYouliang Zheng
Oct 5, 2018·BMC Bioinformatics·Juan Manuel CrescenteLeonardo Sebastián Vanzetti
Dec 12, 2018·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Eva JanákováMiroslav Valárik

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