Comparative evolutionary analyses of eight whitefly Bemisia tabaci sensu lato genomes: cryptic species, agricultural pests and plant-virus vectors

Table 8 Selection pressure analysis on the Bemisia tabaci SSA1-SG1 α-glucosidase (GH13) genes

Gene	Likelihood ratio test (LRT)	Number of sites under pervasive selection at P ≤ 0.01		Presence of episodic diversifying selection
		Diversifying selection ( +)	Purifying selection (-)
ENSSSA1NGT018454	132.57	8	2	+
ENSSSA1UGT001243	16.08	4	0	+
ENSSSA1UGT028152	11.54	1	0	+
ENSSSA1UGT020483	2.39	1	0	-
ENSSSA1NGT009143	1.88	2	0	-
ENSSSA1NGT010254	1.06	1	0	-
ENSSSA1UGT025021	0.93	3	0	-
ENSSSA1UGT025365	0.00	0	0	-
ENSSSA1NGT011100	0.00	2	0	-

Analysis of selection pressure acting on the α-glucosidase (GH13) gene of B. tabaci SSA1-SG1-Ug and B. tabaci SSA1-SG1-Ng in “cluster 2”. The adaptive Branch-site Random Effects Likelihood (aBSREL) software analyzed diversifying selection using a branch-site effects model [116], while Fixed Effect Likelihood (FEL) software analyzed the number of sites within a gene with pervasive selection [117]. Three genes showed episodic diversifying selection indicating adaptive evolution

ISSN: 1471-2164