Additional file 4.

The figure shows the variation of lateral root density among RILs. 40 RILs were investigated 8days after germination, 4 plants per genotype were investigated for lateral root density. Lateral root numbers in primary root were counted manually and was divided by the total length of the primary root as a parameter for lateral root density (De Smet et al. 2012). Analysis of variance for the lateral root density among 40 RILs were performed.

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Li et al. BMC Plant Biology 2012 12:220   doi:10.1186/1471-2229-12-220