Selection for early and late adult emergence alters the rate of pre-adult development in Drosophila melanogaster

Table 3 Mean development time of the early, control and late populations

Light regime	Population	Sex	Mean ± SEM
			morning	evening
LL	early	M	234.04 ± 0.90	239.18 ± 0.63
		F	230.42 ± 0.31	235.46 ± 0.54
	control	M	234.84 ± 0.81	239.82 ± 0.44
		F	230.90 ± 0.81	235.44 ± 0.50
	late	M	239.20 ± 1.00	246.26 ± 1.06
		F	236.09 ± 1.33	242.39 ± 0.68
LD	early	M	251.50 ± 1.49	255.76 ± 0.44
		F	246.66 ± 1.66	252.81 ± 0.66
	control	M	251.84 ± 1.04	255.38 ± 0.57
		F	246.22 ± 0.77	253.13 ± 1.11
	late	M	254.80 ± 0.81	259.30 ± 0.91
		F	250.55 ± 0.77	256.09 ± 0.79
DD	early	M	270.91 ± 0.86	268.46 ± 0.68
		F	267.25 ± 1.19	263.75 ± 0.85
	control	M	269.98 ± 0.56	270.31 ± 0.45
		F	263.76 ± 0.69	266.27 ± 0.45
	late	M	273.76 ± 0.73	274.97 ± 0.31
		F	269.29 ± 0.78	270.94 ± 0.61

Mean (± SEM) development time of males (M) and females (F) from the selected and control populations under constant light (LL), light/dark (LD) and constant dark (DD) conditions. The eggs were collected in a 2 hr window during the morning (07:00–09:00 hr) and the evening hours (17:00–19:00 hr). Pre-adult development time (in hours) was calculated as the time interval between the midpoint of egg collection windows and the midpoint of the 2 hr period during which the fly emerged as adult.

ISSN: 1471-213X