Experimental insight into the proximate causes of male persistence variation among two strains of the androdioecious Caenorhabditis elegans (Nematoda)

Table 1 Variation in the number of mated hermaphrodites, offspring per male as well as cross- and self-progeny per mated hermaphrodite for the whole experimental period^a

Cross	Mates	Offspring/male	Cross-progeny/herm	Self-progeny/herm.
	Mean ± SE	Mean ± SE	Mean ± SE	Mean ± SE
N2 × N2	7.9 ± 1.6	1272.8 ± 367.7	151.2 ± 16.6	192.2 ± 8.8
N2 × CB4856	17.2 ± 2.2	2860.6 ± 341.5	170.6 ± 13.8	190.7 ± 7.2
CB4856 × N2	6.7 ± 1.9	870.9 ± 335.8	106.4 ± 13.8	124.1 ± 11.3
CB4856 × CB4856	17.5 ± 1.2	3003.2 ± 315.1	170.1 ± 11.4	108.1 ± 7.3
Analysis
Whole model	F_6,32 = 5.81; P <0.001	F_6,32 = 4.93; P = 0.001	F_6,32 = 2.31; P = 0.058	F_6,32 = 16.2; P <0.001
Male strain	F₁ = 17.95, P <0.001	F₁ = 13.67, P <0.001	F₁ = 3.71, P = 0.063	F₁ = 3.41, P = 0.074
Hermaphrodite strain	F₁ = 0.23, P = 0.636	F₁ = 0.02, P = 0.888	F₁ = 0.56, P = 0.460	F₁ = 50.53, P <0.001
Interaction	F₁ = 0.13, P = 0.722	F₁ = 0.54, P = 0.466	F₁ = 2.42, P = 0.130	F₁ = 0.78, P = 0.383

a, For each cross (top half of the table), the hermaphrodite strain is given first, the male strain last. The mean number of mated hermaphrodites per male, the mean number of offspring per male, the mean number of cross-progeny per male and mated hermaphrodite as well as the mean number of self-progeny per male and mated hermaphrodite are shown. SE, standard error. Statistical results (bottom half of the table) are shown for the whole model. If the latter shows at least a trend (P < 0.01), then the statistical importance of different factors in the model are given. The model also included the random factor "experimental date", which however never produced a significant effect (F₃ < 2.7, P > 0.06). Significant probabilities are given in bold.

ISSN: 1472-6785