Skip to main content

Table 2 Path analysis showing the partitioning of the phenotypic correlations into direct and indirect effects of root traits on total seedling dry weight and P content

From: Multiple interval QTL mapping and searching for PSTOL1 homologs associated with root morphology, biomass accumulation and phosphorus content in maize seedlings under low-P

Independent variables   Dependent variables
  Total dry weight Total P content
Root surface area Direct effect 5.935 1.597
Indirect effect via root length −4.734 −0.977
Indirect effect via surface area of fine roots −0.544 −0.094
Indirect effect via root diameter 0.203 −0.135
Phenotypic correlation (r) 0.86 0.39
Root length Direct effect −4.831 −0.997
Indirect effect via surface area 5.816 1.565
Indirect effect via surface area of fine roots −0.462 −0.081
Indirect effect via root diameter 0.267 −0.177
Phenotypic correlation (r) 0.79 0.31
Surface area of fine roots Direct effect −0.681 −0.117
Indirect effect via root length −3.284 −0.678
Indirect effect via surface area 4.748 1.277
Indirect effect via root diameter −0.012 0.008
Phenotypic correlation (r) 0.77 0.48
Root diameter Direct effect −0.424 0.281
Indirect effect via root length 3.043 0.628
Indirect effect via surface area −2.848 −0.766
Indirect effect via surface area of fine roots −0.020 −0.003
Phenotypic correlation (r) −0.25 0.14
  Coefficient of determination 0.869 0.295