Table 1. Description of 10 measured traits for both sweetpotato genotypes grown in the root phenotyping platform evaluated at 5, 10, 15 and 20 days after placement in the growth unit.

Trait Name	Unit	Trait Description
Total Root Length	cm	Cumulative length of all roots in entire root system
Total Root Surface Area	cm2	Cumulative surface area of all roots in entire root system
Average Root Diameter	mm	Average diameter of all roots in entire root system
Total Root Volume	cm3	Cumulative volume of all roots in entire root system
Number of Root Tips	count	Cumulative tips of all roots in entire root system
Number of Root Forks	count	Cumulative forks of all roots in entire root system
Root Length Pattern	cm	Root length by depth at each 10 cm depth
Root Depth Index	%	Percent vertical centroid of root distribution in the soil
Root Branching Density	branch cm−1	Number of lateral branches per length unit along a root
Root Length Distribution by Diameter Class	cm	Cumulative root length by root diameter [very fine (0-0.6 mm), fine (>0.6 to ≤1.2 mm), large (>1.2 to ≤1.8 mm), and very large (>1.8 mm)]