Table 1 Summary of principal components analyses
NC populationsNC F2Norway F2
PC1 standard deviationa1.6101.5241.494
Coefficientsb
 SpD0.5740.5840.625
 RS0.4530.4310.520
 SilS0.4290.4370.184
 SdSil0.0570.178−0.028
 SdMass−0.0510.016NAc
 dDr−0.525−0.501−0.552
  • a Square root of PC1 eigenvalue, from the prcomp package in R.

  • b Abbreviations: SpD, spring diameter; RS, reproductive shoots; SilS, siliques per shoot; SdSil, seeds per silique; SdMass, seed mass; and dDr, net reproductive season diameter growth.

  • c Seed mass was not measured in Norway. The principal components analysis for Norway data included only the remaining five traits.