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Table 3 Latency until mating

From: Experimental evolution under hyper-promiscuity in Drosophila melanogaster

Test

Male typea

Female typea

Generation

Mating number

Risk ratio, SPR-: control (95 % CI)

χ

P

(a) Effects of SPR- deficiency in males

SPR- or C

WT

N/A

1st

2.1 (1.0, 4.3)

4.2

0.04

   

N/A

1st

1.6 (1.0, 2.7)

3.7

0.055

   

N/A

5th

2.4 (1.4, 4.2)

9.7

0.002

Experimental evolution of malesb

SPR- or C

WT

16

1st

2.7 (2.0, 3.6)

43.3

<0.0001

   

36

1st

1.0 (0.8, 1.2)

0.0

0.82

   

36

5th

0.8 (0.6, 1.0)

4.2

0.04

(b) Effects of SPR- deficiency in females

WT

SPR- or C

N/A

1st

0.8 (0.5, 1.3)

0.9

0.35

Experimental evolution of females

WT

SPR- or C

26

1st

0.7 (0.5, 0.9)

5.4

0.02

(c) Effects of SPR- deficiency in within-treatment pairs

SPR- or C

SPR- or C

N/A

1st

7.4 (3.5, 16.3)

27.6

<0.0001

Experimental evolution in within-treatment pairs

SPR- or C

SPR- or C

26

1st

3.4 (2.4, 4.8)

47.6

<0.0001

  1. aMales and females were SPR- or genetically matched controls (C), or wild-type (WT)
  2. bFull model details for generation 36 are given in Additional file 1 (Table S1)
  3. Effects of the SPR- deficiency itself in unselected flies, or experimental evolution in SPR- and control populations, on latency until a first mating by (a) experimental males (mating for the first or fifth time) paired with wild-type females, (b) experimental females paired with wild-type males, or (c) experimental males and females paired within treatment and replicate population. Risk ratios > 1 indicate that SPR- males were faster to mate; values < 1 indicate control males were faster