Additional file 1: Table S1. of Intraspecific lineage divergence and its association with reproductive trait change during species range expansion in central Eurasian wild wheat Aegilops tauschii Coss. (Poaceae)

The Ae. tauschii accessions used. (DOCX 31 kb

Additional file 2: Figure S1. of Intraspecific lineage divergence and its association with reproductive trait change during species range expansion in central Eurasian wild wheat Aegilops tauschii Coss. (Poaceae)

Plot of the 198 Ae. tauschii accession geographic coordinates against the seed-production PC values. A. Latitude. B. Longitude. (TIFF 32105 kb

Graph of the first three and two axes from two principal component analyses based on the six spikelet shape-related (A, B) and four grain shape-related (C) traits.

<p>Graph of the first three and two axes from two principal component analyses based on the six spikelet shape-related (A, B) and four grain shape-related (C) traits.</p

Comparison of the QTL positions on the chromosome 7D linkage maps between the three <i>Ae</i>. <i>tauschii</i> populations.

<p>QTLs with LOD scores above the thresholds are indicated, and genetic distances are given in centimorgans. Gray boxes indicate putative centromeric regions.</p

Genotypic effects of selected QTLs on spikelet-related traits in the KU-2003/KU-2124 and PI476874/IG47182 populations.

<p>The genotypes of QTLs were inferred from genotyping data in the marker intervals shown above each graph. Means ± SD with the same letter were not significantly different (<i>P</i> > 0.05, Tukey-Kramer HSD test).</p

Eigenvectors for the first and second principal components for the six spikelet-related traits.

<p>Eigenvectors for the first and second principal components for the six spikelet-related traits.</p

Comparison of the QTL positions on the chromosomes 3D (A) and 4D (B) linkage maps between the three <i>Ae</i>. <i>tauschii</i> populations.

<p>QTLs with LOD scores above the thresholds are indicated, and genetic distances are given in centimorgans. Gray boxes indicate putative centromeric regions.</p

Parental and F₂ population means for four grain-shape related traits in the two mapping populations.

<p>Parental and F₂ population means for four grain-shape related traits in the two mapping populations.</p

Box and dot plots for the six spikelet-related traits based on the lineages and sublineages.

<p>Welch’s <i>t</i>-test was conducted for statistical significance (***<i>P</i> < 0.001) of differences between the two lineages, TauL1 and TauL2. Sublineages sharing a common letter were not significantly different (Steel-Dwass test, <i>P</i> < 0.05). The tests were performed excluding TauL3 in the interlineage analyses and TauL1x and TauL2x in the intersublineage analyses because of the lack of statistical power. Red and black dots indicate the accessions of subspecies <i>strangulata</i> and <i>tauschii</i>, respectively.</p

Photos of the parental accessions of the mapping populations.

<p>(A) Spike phenotype of each parental accession. (B) Grain shape of the two subspecies.</p