Single nucleotide polymorphisms in a regulatory site of VRN-A1 first intron are associated with differences in vernalization requirement in winter wheat

Winter wheats require a long exposure to cold temperatures (vernalization) to accelerate flowering. However, varieties differ in the length of the period of cold required to saturate the vernalization response. Here we show that single nucleotide polymorphisms (SNP) at the binding site of the GRP2 p...

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Bibliographic Details
Published in:Molecular genetics and genomics : MGG 2018-10, Vol.293 (5), p.1231-1243
Main Authors: Kippes, Nestor, Guedira, Mohammed, Lin, Lijuan, Alvarez, Maria A., Brown-Guedira, Gina L., Dubcovsky, Jorge
Format: Article
Language:English
Subjects:
Alleles
Animal Genetics and Genomics
Biochemistry
Biomedical and Life Sciences
Cold
Flowering
GRP2 protein
Haplotypes
Human Genetics
Life Sciences
Microbial Genetics and Genomics
Original
Original Article
Plant Genetics and Genomics
Polymorphism
Single-nucleotide polymorphism
Transcription
Triticum aestivum
Vernalization
Wheat
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Summary:Winter wheats require a long exposure to cold temperatures (vernalization) to accelerate flowering. However, varieties differ in the length of the period of cold required to saturate the vernalization response. Here we show that single nucleotide polymorphisms (SNP) at the binding site of the GRP2 protein in the VRN-A1 first intron (henceforth, RIP3) are associated with significant differences in heading time after a partial vernalization treatment. The ancestral winter VRN-A1 allele in ‘Triple Dirk C’ has one SNP in the RIP3 region (1_SNP) relative to the canonical RIP3 sequence, whereas the derived ‘Jagger’ allele has three SNPs (3_SNPs). Both varieties have a single VRN-A1 copy encoding identical proteins. In an F 2 population generated from a cross between these two varieties, plants with the 3_SNPs haplotype headed significantly earlier ( P  
ISSN:1617-4615
1617-4623
DOI:10.1007/s00438-018-1455-0