TABLE 2

Comparisons of nucleotide diversity between nematode species with different mating systems

GeneSpeciesMating
system
No.
strains
Length
(bp)
Silent
sitesa
No.
haplotypes
P/S/RbTajima’s
Dc
πt × 10-3πsi × 10-3
tra-2elegansSelf2067029710/0/000
briggsaeSelf676050029/0/41.36.35.3
remaneiCross124181841212/2/20.411.220.6
glp-1elegansSelf2054735321/1/01.30.91.4
briggsaeSelf667022233/1/10.92.34.2
remaneiCross124261371020/12/30.418.845.7
COIIelegansSelf11696151415/14/11.710.243.2
briggsaeSelf6686149516/16/0-0.49.644.3
remaneiCross12686147838/37/11.022.8104.8
spe-9elegansSelf163385186946/2/2-1.30.30.5
  • a Total number of synonymous coding sites plus intron sites compared between sequences, on average.

  • b Total number of polymorphic (P) sites, as well as the number of polymorphisms that were synonymous (S) and replacement (R) changes in coding sequences. The number of polymorphic intron sites = P - (S + R).

  • c No significant departures from the frequency distribution expected under neutrality were observed.