Comparison of male reproductive success in malaria-refractory and susceptible strains of Anopheles gambiae

Malaria Journal

Table 2 Male reproductive success in refractory versus susceptible genotypes

Mean male emergence time (days)
Effect	df	SS	MS	F	p
block	1	0.582	0.582	42.12	< 0.001
genotype	1	0.016	0.016	1.18	0.299
block:genotype	1	0.256	0.256	18.51	0.001
Error	12	0.166	0.014
Mean male wing length (mm)
Effect	df	SS	MS	F	p
block	1	0.139	0.139	115.23	< 0.001
genotype	1	0.002	0.002	1.47	0.249
block:genotype	1	0.000	0.000	0.21	0.652
Error	12	0.014	0.001
Proportion of inseminated females
Effect	df	SS	MS	F	p
block	1	0.008	0.008	0.87	0.370
genotype	1	0.001	0.001	0.13	0.721
block:genotype	1	0.021	0.021	2.25	0.160
Error	12	0.111	0.009
Proportion of females with motile sperm in their spermathecae
Effect	df	SS	MS	F	p
block	1	0.117	0.117	3.86	0.073
genotype	1	0.000	0.000	0.00	0.959
block:genotype	1	0.003	0.003	0.10	0.752
Error	12	0.363	0.030
Proportion of ovipositing females
Effect	df	SS	MS	F	p
block	1	0.363	0.363	9.37	0.010
genotype	1	0.004	0.004	0.09	0.764
block:genotype	1	0.001	0.001	0.03	0.856
Error	12	0.465	0.039
Mean number of eggs per batch
Effect	df	SS	MS	F	p
block	1	644.395	644.395	22.31	< 0.001
genotype	1	197.584	197.584	6.84	0.023
block:genotype	1	209.044	209.044	7.24	0.020
Error	12	346.602	28.883

The six male traits are mean time to emerge, mean wing length, the proportions of inseminated, motile sperm bearing, and ovipositing females, and the mean number of eggs per batch. Each male trait is modeled as a two-way ANOVA of block (black versus red), male genotype (refractory versus susceptible) and their interaction. Shown are the degrees of freedom (df), sum of squares (SS), mean squares (MS), the F-statistic (F), and the p-value.

ISSN: 1475-2875