Genome-wide identification and expression analysis of expansin gene family in common wheat (Triticum aestivum L.)

Table 2 Tests for positive selection among codons of expansin genes using site models

Models	p ^a	Estimates of parameters	InL	2⊿l	Positively selected sites^b
M0	1	ω =0.05125	-8064.27327		None
(one-ratio)
M3	5	p0 = 0.00000 p1 = 0.66833 p2 = 0.33167	-7934.18358	260.2(M3 vs M0)	None
(discrete)		ω1 = 0.00000 ω2 = 0.02999 ω3 =0.10964
M7	2	p =1.60629 q = 21.60686	-7907.56503		Not allowed
(beta)
M8	4	p0 =0.99999 p = 1.60629 q =21.60695	-7907.56552	0.00098(M8 vs M7)	None
(beta&ɯ)		(p1 =0.00001) ω =1.17268

Note: ^aNumber of parameters in the ω distribution
^bPositive-selection sites are inferred at posterior probabilities > 95% with those reaching 99% shown in bold
*Sites were also found to be implicated in the functional divergence
Note: All sites are located on the reference sequence TaEXPA1-A based on the multiple alignment results

ISSN: 1471-2164