Table 2.

Numbers of genes associated with core processes in C. elegans and the five plant-parasitic nematodes.

process/pathway	C. elegans	B. xylophilus	D. destructor	G. pallida	M. halpa	M. incognita
development control
intestine development	24	19	20	15	16	16
pharynx development	25	11	15	12	7	11
Q neuroblast development	32	14	21	15	12	7
embryo development	48	22	21	19	21	17
programmed cell death	28	16	14	11	11	12
translational control of maternal RNAs	15	8	7	4	6	5
signal transduction
RTK-Ras-ERK signalling	58	44	48	40	42	37
Eph receptor signalling	25	20	22	17	19	13
heterotrimeric G proteins	25	16	15	12	12	14
Hh signalling network	63	28	32	18	21	20
insulin/insulin-like growth factor signalling	18	13	14	10	13	13
notch signalling	47	40	35	33	32	31
nuclear hormone receptor	284	68	51	54	23	18
small GTPases	34	29	29	22	24	21
TGF-β signalling	26	16	15	16	15	11
chemoreceptor	1276	324	197	120	68	108
Wnt signalling	38	31	33	26	26	21
other core processes
autophagy	19	13	10	11	14	10
neurogenesis	64	32	32	21	18	18
sex determination	23	7	11	8	5	7
neuropeptide genes	122	28	29	16	18	16
RNAi pathway	78	37	36	27	28	26