experiment: E14
kind: mating_system
seed: 20260709
n_replicates: 20

# (Mating systems — monogamy vs promiscuity): a finite population of genotypes evolves on a Kauffman
# NK landscape, recombining sexually, but the MATE-POOL BREADTH is swept. Agents sit on a ring; an
# offspring's second parent is drawn from a window of half-width ~ breadth*N/2 around the focal parent,
# and selection is LOCAL (offspring competes only against the incumbent at its ring position). breadth
# -> 0 is monogamous / structured (local mating, isolation by distance); breadth = 1 is promiscuous /
# panmictic (mate with anyone). Crossed with ruggedness K, this is the mating-system image of the E9
# design rule. Expect: on smooth landscapes (K low) promiscuity maximises the best fitness (spread the
# single good direction fastest); as ruggedness rises the OPTIMAL breadth SHRINKS toward an intermediate
# value (full promiscuity prematurely converges below it); and diversity + occupied local optima are
# monotonically destroyed by breadth at every K, most severely on rugged landscapes. Falsifier: the best
# breadth is independent of K (no crossover), or promiscuity is best at every ruggedness.

mating:
  L: 12              # loci (genotype space 2^L)
  N: 48              # population size (ring positions)
  breadth: 1.0       # mate-pool breadth in [0,1] (overwritten by the sweep)
  K: 0               # landscape ruggedness / epistasis (overwritten by the sweep)
  recomb_rate: 0.5   # per-gap crossover rate (near-free reassortment within a mating)
  mu: 0.003          # per-locus mutation rate

generations: 60

sweep:
  - param: mating.K
    values: [0, 3, 6, 10]
  - param: mating.breadth
    values: [0.03, 0.08, 0.17, 0.35, 0.6, 1.0]

output: {dir: results/figS13_mating_breadth}