Bioinformatics data analyses. Mapping was performed using the MAQ software version 0.7.1 (http://maq.sourceforge. net/maq-man.shtml). An average of 95% reads were mapped on the ''F78 URT 1.4 m'' consensus sequence for each sample analyzed with a mean coverage of 21.2K reads per nucleotide. Mapping results were used to extract a list of single nucleotide polymorphisms (SNPs) throughout the genome (see Supplementary method: bioinformatics data analyses).