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. 2015 Oct 13;67(1):207–225. doi: 10.1093/jxb/erv449

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© The Author 2015. Published by Oxford University Press on behalf of the Society for Experimental Biology.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 1. — Characterization of the six sugar beet genotypes during vernalization. (A) Bolting index of genotypes after 0, 3, 9, or 18 weeks of vernalization treatment (4 °C). S1, S2, and S3 (open circles, squares, and triangles) were considered as bolting sensitive, while R1, R2, and R3 (filled circles, squares, and triangles) were considered as bolting resistant. On the right is indicated the bolting delay after 18 weeks of vernalization for each genotype. (B) Genetic clustering based on 708 single nucleotide polymorphisms for the three bolting-resistant (R1–R3) genotypes, the three bolting-sensitive (S1–S3) genotypes, and nine other genotypes with distinct bolting tolerance levels after 9 weeks of vernalization treatment.