Figure 2. Frequency distribution of root architectural traits of the TNDH population grown for 14 days in a ‘pouch and wick’ system under low Pi (LP, 0 mM P) and ‘normal’ Pi (NP, 0.25 mM P).

A = TRL (total root length); B = PRL (primary root length); C = TLRL (total lateral root length); D = MLRL (mean lateral toot length); E = LRN (lateral root number); F = LRD (lateral root density). Open circles = parent Ningyou7; filled circles = parent Tapidor.