TABLE 2

Summary statistics for life span of RI line crosses to Oregon and 2b strains

CrossDensitySexLife spanVLaVRbVL/(VL + VR)CVGcP(GSI)drGSe(L1, L2)f
RI × OregonLow46.4 ± 0.40.00510.23680.0210.15NS
47.5 ± 0.50.00040.31980.0010.04
High47.3 ± 0.40.0305****0.17830.1460.37****−0.08 (−0.12, −0.04)
48.5 ± 0.60.0763****0.28650.2100.56
RI × 2bLow43.2 ± 0.40.0180***0.12720.1240.31NS0.98 (0.978, 0.982)
55.0 ± 0.50.00260.22350.0120.27
High46.6 ± 0.40.0155***0.12300.1110.27*0.55 (0.52, 0.58)
58.1 ± 0.60.0254****0.21880.1040.27
  • Life span is the average life span ± 1 SE pooled over all RI lines from each cross, sex, and density treatment. NS, P > 0.05; *, 0.01 < P < 0.05; ***, 0.0001 < P < 0.001; ****, P ≤ 0.0001.

  • a VL, variance component for testing differences among lines.

  • b VR, variance component for vial replicate plus the residual variance from each ANOVA that generated the VL.

  • c Embedded Image , where Embedded Image is the average life span among lines, and VL,U is the variance component for lines from ANOVAs on untransformed life span data.

  • d P(GSI) values are from F-ratio tests of significance of the sex-by-line interaction term from the combined sex ANOVAs and indicate whether the correlation between sexes in high and low density is significantly different from unity.

  • e rGS is the genetic correlation between the sexes within cross and density.

  • f The lower and upper confidence limits for rGS.