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Table 6 Sperm precedence

From: Experimental evolution under hyper-promiscuity in Drosophila melanogaster

Phenotype Test Generation Mating number SPR- proportion sired ± S.E. Control mean proportion sired ± S.E. t-value df P
P1a Effects of SPR- in unselected males N/A 1st 0.06 ± 0.04 0.15 ± 0.03 3.3 1,36 0.08
    5th 0.04 ± 0.01 0.05 ± 0.01 0.1 1,36 0.82
  Effects of SPR- in experimentallly-evolved backcrossed controls N/A 1st 0.17 ± 0.01 0.12 ± 0.01 −1.0 1,284 0.31
    5th 0.07 ± 0.01 0.11 ± 0.01 −0.7 1,224 0.47
  Experimental evolution of males 36 1st 0.14 ± 0.02 0.18 ± 0.02 −1.4 1,6 0.20
    5th 0.06 ± 0.01 0.08 ± 0.01 −1.5 1,6 0.19
P2b Effects of SPR- in unselected malesb N/A 1st 0.88 ± 0.03 0.89 ± 0.04 0.2 1,35 0.60
  Effects of SPR- in experimentally-evolved backcrossed controls N/A 1st 0.78 ± 0.12 0.91 ± 0.06 2.5 1,221 0.01
  Experimental evolution of males 36 1st 0.85 ± 0.02 0.81 ± 0.02 2.2 1,6 0.07
  1. aFull model results in Additional file 1: Table S6
  2. bFull model results in Additional file 1: Table S7
  3. Effects of the SPR- deficiency itself, or experimental evolution in SPR- and control populations, on the proportion of offspring sired by a focal male as the first or second male to mate with a wild-type female (P1 or P2, respectively). P1 tests include a male’s first and fifth mating to test for differences in male ejaculate depletion across successive matings. Effects of the SPR deficiency itself were evaluated in unselected flies or in experimentally evolved backcrossed or outcrossed controls (see Methods)