TABLE 1

Demographic parameters for reciprocal F1 genotypes

Descriptive statisticsMortality parametersLikelihood scores
NMedianMeanMax.αβsCUniqueFixed αFixed βFixed sFixed C
Females
    FTF × Crete2824848.43800.00000.18080.99700.0014−2184.30−2184.33−2184.31−2185.30−2184.34
    Crete × FTF3004644.42860.00000.18390.54850.0016NSNSNSNS
    Crete × sm382884848.72840.00000.43056.33360.0036−2272.02−2281.11−2288.59−2298.61−2279.82
    sm38 × Crete2816459.74820.00010.11760.00570.0006<0.0001<0.0001<0.0001<0.0001
    Crete × sm212915249.93740.00010.13960.41580.0017−2218.66−2229.02−2236.42−2238.36−2218.68
    sm21 × Crete2773641.39720.00000.56117.38910.0019<0.0001<0.0001<0.0001NS
    FTF × sm382695851.76800.00000.21280.75900.0056−2131.68−2135.13−2133.85−2132.37−2132.37
    sm38 × FTF2575047.06740.00020.11930.25310.0039<0.05<0.05NSNS
    FTF × sm212824240.05600.00020.14260.19490.0019−2138.14−2138.97−2139.68−2138.14−2138.99
    sm21 × FTF2774644.45740.00070.10000.16570.0001NSNSNSNSNS
Males
    FTF × Crete2725856.50860.00040.08670.14010.0003−2259.81−2264.19−2264.96−2263.41−2260.9293
    Crete × FTF2895654.57860.00000.17081.17590.0014<0.01<0.01<0.01NS
    Crete × sm382704847.76780.00000.39533.82100.0027−2058.39−2064.04−2069.88−2068.62−2063.0638
    sm38 × Crete2556462.08880.00000.12380.45540.0006<0.01<0.0001<0.0001<0.01
    Crete × sm212685653.96820.00010.12480.54590.0016−2117.27−2119.08−2118.35−2118.50−2121.4039
    sm21 × Crete2635452.23780.00040.09620.08960.0000NSNSNS<0.01
    FTF × sm382986054.53880.00020.09520.11900.0034−2352.04−2352.39−2352.08−2352.05−2355.4449
    sm38 × FTF2675754.85860.00040.08960.16070.0007NSNSNS<0.05
    FTF × sm212875248.53780.00010.14310.42810.0030−2188.78−2191.13−2191.32−2188.79−2196.8517
    sm21 × FTF2615653.85880.00030.10160.40130.0000<0.05<0.05NS<0.0001
  • Numbered crosses refer to the same numbers in Figure 4. Values were estimated using Winmodest program (Pletcher et al. 2000). The mortality parameters are the intercept (α), slope (β), late-life mortality deceleration term (s), and an age-independent mortality term (C) for age-specific mortality rate (see Figures 2 and 3). The preferred model for all genotypes was the Logistic-Makeham (data not shown). Likelihood ratio tests were conducted by contrasting the likelihood of model where each line in a pair of lines was allowed to have unique values for the four parameters (“unique”) vs. a model where one term was constrained to a fixed value for both lines (fixed α, fixed β). The intercept terms (α) often differed by several orders of magnitude despite being very low; only four digits are displayed. See materials and methods for details.