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. 2016 Oct 24;46(1):28–35. doi: 10.1080/03079457.2016.1200011

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© 2016 Houghton Trust Ltd

This article is made available via the PMC Open Access Subset for unrestricted re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for the duration of the COVID-19 pandemic or until permissions are revoked in writing. Upon expiration of these permissions, PMC is granted a perpetual license to make this article available via PMC and Europe PMC, consistent with existing copyright protections.

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Figure 1. — Phylogenetic relationships of Spanish and Italian IBV strains based on the sequence of the complete S1 gene. The unrooted tree was created by the maximum likelihood method implemented in the IQ software and bootstrapped with 1000 replicates. Only bootstrap values higher than 50% are shown. Spanish and Italian sequences are highlighted by boxes.