Rec1
seq_1    1    33    gene
seq_1    1    20    part
seq_1    21    27    part
seq_1    28    33    part

Rec2
seq_2    1    80    gene
seq_2    1    80    part

Rec3
seq_3    1    55    gene
seq_3    1    30    part
seq_3    31    50    part