Genome-wide association screening and verification of potential genes associated with root architectural traits in maize (Zea mays L.) at multiple seedling stages

Table 2 Pearson correlation coefficients between the seven root-related traits within the mapping population at V1, V2 and V3 stages

Traits	RDW	RDW/SDW	TRL	SUA	ARD	ROV
V1
RDW/SDW	0.719^**
TRL	0.330^**	0.022
SUA	0.389^**	0.081	0.886^**
ARD	0.194^**	0.050	0.055	0.261^**
ROV	0.425^**	0.103	0.669^**	0.854^**	0.514^**
RBN	0.299^**	0.050	0.835^**	0.781^**	0.087	0.597^**
V2
RDW/SDW	0.648^**
TRL	0.659^**	0.270^**
SUA	0.535^**	0.184^**	0.826^**
ARD	0.004	0.029	0.011	0.309^**
ROV	0.459^**	0.156^*	0.614^**	0.884^**	0.502^**
RBN	0.473^**	0.304^**	0.783^**	0.758^**	0.114	0.577^**
V3
RDW/SDW	0.675^**
TRL	0.771^**	0.412^**
SUA	0.818^**	0.464^**	0.924^**
ARD	0.000	0.054	-0.036	0.051
ROV	0.639^**	0.353^**	0.680^**	0.843^**	0.247^**
RBN	0.310^**	0.149^*	0.442^**	0.523^**	0.169^*	0.800^**

RDW root dry weight, RDW/SDW root per shoot dry weight, TRL total root length, SUA surface area, ARD average root diameter, ROV root volume, RBN root branching number
the symbol * and ** indicate respectively, significance at P < 0.05 and at P < 0.01

ISSN: 1471-2164