I have reference genome and four sample assembly genomes. The sample genomes were mapped to reference genome using BWA and SAMTOOL. Then, I used GATK haplotype caller and got the four SNP VCF files. Because I am interested in one target gene located on chromosome 18. I extracted SNPs around the gene from ch18 and get new four VCF files. Based on the new SNP vcf file, I would like to make a phylogenetic tree using TASSEL(version5). However, I am not sure using TASSEL could generate tree and the manual of TASSEL does not describe how make a tree. Does anyone have that experience? Any suggestion would be very appreciated! Thank you!