Barley sodium content is regulated by natural variants of the Na<sup>+</sup> transporter HvHKT1;5.

For grain Na + content we observed a single highly significant association on the bottom of chromosome 4HL for the marker SCRI_RS_142792, with a −log10(p) = 11.8, FDR adjusted p -value = 2.2E-08, and an R 2 = 0.45 (Fig. 1b ) consistent with prior genetic analyses of shoot Na + content 19 – 21 .

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