Table 1 Trait designations and descriptions
Trait nameAcronymDescription (units)Definition
Original trait
Root numberRNAverage number of rootsTotal root number/number of germinated seeds
Root surface areaRSA_iRoot surface area measured at day i (mm2)
Shoot lengthSL_iShoot length measured at day i (mm)
Derived trait
Average root surface areaAVRSARoot surface area at day 5 divided by root number (mm2)RSA_5/RN
Root growth rateRG_iDifference of root surface area between two subsequent time points (mm2·day-1)RSA_i – RSA_i-1
Root relative growth rateRRGR_iRoot growth rate divided by the root surface area at the earlier time point (day-1)(RG_i)/RSA_i-1
Shoot growth rateSG_iDifference of shoot length between two subsequent time points (mm·day-1)SL_i - SL_i-1
Shoot relative growth rateSRGR_iShoot growth rate divided by the shoot length at the earlier time point (day-1)(SG_i)/SG_i-1