obj.LDL.add(param,don)-error variance
-Q allele effect
-evolution time
-Q allele frequency at time t=0
-performance mean
descendant.pere(),
moyenne.pere(), corresp(), pi.hap(), structure.hap(), poids.D() functions.depart.LDL, descendant.pere, moyenne.pere, corresp,
pi.hap, structure.hap, poids.D