From vcf_file to bed_file using plink, **_MAXGT and **_PLOY make two records

Question

[boymin2020]

Hi everyone,

I merged many SNP vcf files (with two colunm names are 'ID_MAXGT' and 'ID_PLOY') to a vcf file. Each vcf file has one unique ID. And I used the following command to handle it.

plink --vcf filename.vcf --make-bed --out outputfile

then in the reslt file. Every ID has two records, ID_MAXGT and ID_PLOY. But I just need one.

My question is which one is defaultly used or is there any option in PLINK can select one of them by itself ???

Thanks in advance.