Heritable determinants of male fertilization success in the nematode Caenorhabditis elegans

Table 3 Summary of the leading four eigenvectors from a Principal Components (PC) Analysis of male reproduction traits

		factor
PC axis	eigenvalue (%)	courtship ability ^a	mating ability ^b	number of transferred sperm ^c	spermatid size ^d	sperm production rate ^e	P2 early	P2 late
PC1	3.04 (43.4%)	0.373	-0.292	0.076	0.395	-0.531	0.566	0.110
PC2	2.41 (34.5%)	-0.454	-0.513	0.553	0.075	0.171	-0.016	0.437
PC3	0.753 (10.8%)	0.129	0.060	-0.540	0.036	0.216	0.040	0.799
PC4	0.654 (9.3%)	-0.307	0.230	-0.115	0.884	0.189	-0.078	-0.132

^a mean percent of observations with male-female contact and/or spicule insertion; ^b mean percent females inseminated in 9 h; ^c median number of sperm; ^d median diameter (μm); ^e mean number of sperm/min.

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