Bash Autocompletion - Вставка слов в команды

awk '{g[$1] = g[$1] " " $3}
     END {for (i in g) print i g[i]}' < file1 > file2

Или для сохранения заказа:

awk '! ($1 in g) {snp[n++] = $1}
     {g[$1] = g[$1] " " $3}
     END {for (i = 0; i < n; i++) print snp[i] g[snp[i]]}' < file1 > file2

Включить заголовок "SNP Genoa Genob...":

awk 'NR == 1 {header = $1; prefix = $3; next}
     first == "" {first = "" $1}
     $1 == first {header = header " " prefix $2}
     ! ($1 in g) {snp[n++] = $1}
     {g[$1] = g[$1] " " $3}
     END {
       print header
       for (i = 0; i < n; i++) print snp[i] g[snp[i]]
     }' < file1 > file2