Table 1. H6 viruses characterized in this study.

Virus	Subtype	Abbreviation	Isolation date	Location of isolation	Accession number
A/environment/Jiangxi/24/2009	H6N6	EV/JX/24/09	07/2009	Jiangxi	EPI717857-64
A/environment/Jiangxi/25/2009	H6N6	EV/JX/25/09	07/2009	Jiangxi	EPI717865-72
A/environment/Hunan-Changsha/1/2009	H6N6	EV/HN/1/09	04/2009	Changsha	EPI717873-80
A/environment/Hubei-Jinzhou/02/2010	H6N2	EV/HB-JZ/02/10	10/2010	Jinzhou	EPI717881-88
A/environment/Hunan-Changsha/2/2010	H6N6	EV/HN/2/10	12/2010	Changsha	EPI717889-96
A/environment/Hunan/03/2010	H6N6	EV/HN/03/10	11/2010	Hunan	EPI717897-717904
A/environment/Hunan/07/2010	H6N6	EV/HN/07/10	11/2010	Hunan	EPI717905-12
A/environment/Jiangxi/15/2010	H6N6	EV/JX/15/10	12/2010	Jiangxi	EPI717913-20
A/environment/Hunan/11/2010	H6N6	EV/HN/11/10	10/2010	Hunan	EPI717921-28
A/environment/Hunan/14/2010	H6N6	EV/HN/14/10	10/2010	Hunan	EPI717929-36
A/environment/Guangxi/02/2010	H6N2	EV/GX/02/10	7/2010	Guangxi	EPI717937-44
A/environment/Jiangxi/17/2011	H6N6	EV/JX/17/11	3/2011	Jiangxi	EPI717945-52
A/environment/Jiangxi/19/2011	H6N6	EV/JX/19/11	3/2011	Jiangxi	EPI717953-60
A/environment/Hunan/18/2011	H6N6	EV/HN/18/11	7/2011	Hunan	EPI717961-68
A/environment/Hunan/19/2011	H6N6	EV/HN/19/11	11/2011	Hunan	EPI717969-76
A/environment/Hunan/20/2011	H6N6	EV/HN/20/11	11/2011	Hunan	EPI717977-84