Plot Blastn.table file on R

Hi

I’m trying to find a way to plot the results of my blastn script (.table output file).

The output file is quite big since I had to characterize more than 200 gRNA target sites.

The file contains also a lot of duplicated hits on the subject column and i want just to have the best hits (in the blast script i selected as max e-value 0 ).

Below there is an example, as you can see for a unique gRNA I have multiple results from different subjects that refer to similar sequences, I would like to retain only the best alignment.

kmer_100288745.0    gi|57165544|gb|AY754180.1|  Anopheles gambiae clone GAM_RSP30 satellite AgY477, partial sequence; junction region, complete sequence; and satellite AgY53B, partial sequence    100 25  0   0   1   25  99  123 7.23E-07    50.1
kmer_100288745.0    gi|57165543|gb|AY754179.1|  Anopheles gambiae clone GAM_RSP27 satellite AgY477, partial sequence; junction region, complete sequence; and satellite AgY53B, partial sequence    100 25  0   0   1   25  99  123 7.23E-07    50.1
kmer_100288745.0    gi|57165542|gb|AY754178.1|  Anopheles gambiae clone GAM_RSP22 satellite AgY477, partial sequence; junction region, complete sequence; and satellite AgY53B, partial sequence    100 25  0   0   1   25  99  123 7.23E-07    50.1
kmer_100288745.0    gi|57165541|gb|AY754177.1|  Anopheles gambiae clone GAM_RSP24 satellite AgY477, partial sequence; junction region, complete sequence; and satellite AgY53B, partial sequence    100 25  0   0   1   25  98  122 7.23E-07    50.1
kmer_100288745.0    gi|57165540|gb|AY754176.1|  Anopheles gambiae clone GAM_RSP3 satellite AgY477, partial sequence; junction region, complete sequence; and satellite AgY53B, partial sequence 100 25  0   0   1   25  99  123 7.23E-07    50.1

do you have any suggestions on how to use R to have a nice plot?

Are there any tools or packages?

Thanks!