Genotype Diversity of Newcastle Disease Virus in Nigeria: Disease Control Challenges and Future Outlook

Table 3

Estimates of evolutionary divergence among the virulent NDV genotypes circulating in Nigeria.

	VIg	VIh	VIi	XIVa	XIVb	XVIIa	XVIIb	XVIIIb
VIg		(0.005)	(0.006)	(0.007)	(0.008)	(0.007)	(0.007)	(0.008)
VIh	0.081		(0.007)	(0.007)	(0.007)	(0.007)	(0.007)	(0.007)
VIi	0.099	0.113		(0.008)	(0.009)	(0.008)	(0.008)	(0.008)
XIVa	0.127	0.128	0.149		(0.004)	(0.005)	(0.006)	(0.006)
XIVb	0.132	0.135	0.146	0.067		(0.007)	(0.007)	(0.007)
XVIIa	0.124	0.128	0.136	0.106	0.109		(0.004)	(0.006)
XVIIb	0.122	0.126	0.135	0.104	0.105	0.041		(0.007)
XVIIIb	0.118	0.120	0.132	0.112	0.114	0.093	0.095

The table shows number of base differences per site from averaging over all sequence pairs between groups. Standard error estimate(s) are shown above the diagonal and were obtained by a bootstrap procedure (500 replicates). The analysis involved 120 nucleotide sequences. Codon positions included were 1st+2nd+3rd+Noncoding. All positions containing gaps and missing data were eliminated. Evolutionary analyses were conducted in MEGA6 [28].