TABLE 6

Estimates of linear (α) and epistatic (β) parameters for total productivity and deleterious mutation rates required to overcome a twofold cost of sex

Nos. of
mutations
induced
Mutation rate
providing advantage
to sex
U10U01(α/h)a
(95% CI)
[(β/h2) × 103]a
(95% CI)
[(β/α)/h]a
(95% CI)
Formula b,cFormula c,d
550.1169.200.0792.901.08
(0.06-0.16)(-8-30)(-0.10-0.42)
10100.0582.300.0402.860.96
(0.03-0.08)(-2-7)(-0.05-0.21)
20200.0290.5750.0202.840.87
(0.02-0.04)(-0.5-2)(-0.02-0.11)
30450.0150.1700.0112.790.82
(0.01-0.02)(-0.2-0.5)(-0.01-0.05)
45450.0130.1140.00882.830.81
(0.007-0.02)(-0.1-0.3)(-0.01-0.05)
80800.00720.0360.00492.810.78
(0.004-0.01)(-0.03-0.1)(-0.01-0.02)
  • a Heterozygous coefficients are scaled by dominance coefficient h.

  • b Assumes clonal population begins with same distribution as sexual population or with zero mutations.

  • c Calculations based on equations from Charlesworth (1990), assuming h = 0.25 and free recombination in the sexual population.

  • d Assumes clonal population begins with i = - 2σ mutations (2 SD below the mean of the sexual population).