diff --git a/3rd-party-tools/build-indices/Dockerfile b/3rd-party-tools/build-indices/Dockerfile
index 7f8d7075..9b2d8241 100644
--- a/3rd-party-tools/build-indices/Dockerfile
+++ b/3rd-party-tools/build-indices/Dockerfile
@@ -36,6 +36,7 @@ ENV PATH /usr/local/STAR-${STAR_VERSION}/bin/Linux_x86_64_static/:$PATH
 WORKDIR /script
 COPY add-introns-to-gtf.py .
 COPY modify_gtf.py .
+COPY marmoset_gtf.sh .
 # Add all scripts to PATH
 ENV PATH /script/:$PATH
 
diff --git a/3rd-party-tools/build-indices/marmoset_gtf.sh b/3rd-party-tools/build-indices/marmoset_gtf.sh
new file mode 100644
index 00000000..1b85d0d7
--- /dev/null
+++ b/3rd-party-tools/build-indices/marmoset_gtf.sh
@@ -0,0 +1,159 @@
+#!/bin/bash
+
+# Parse command line arguments
+while getopts "i:m:o:" opt; do
+    case $opt in
+        i) input_gtf="$OPTARG";;      # original GTF for chrM
+        m) modified_gtf="$OPTARG";;   # modified GTF for non-chrM
+        o) output_gtf="$OPTARG";;
+        *) echo "Usage: $0 -i <input_gtf[.gz]> -m <modified_gtf> -o <output_gtf>" >&2
+          exit 1;;
+    esac
+done
+
+# Check if required arguments are provided
+if [ -z "$input_gtf" ] || [ -z "$modified_gtf" ] || [ -z "$output_gtf" ]; then
+    echo "Usage: $0 -i <input_gtf[.gz]> -m <modified_gtf> -o <output_gtf>"
+    exit 1
+fi
+
+# Check if input files exist
+if [ ! -f "$input_gtf" ]; then
+    echo "Input file $input_gtf does not exist!"
+    exit 1
+fi
+if [ ! -f "$modified_gtf" ]; then
+    echo "Modified GTF file $modified_gtf does not exist!"
+    exit 1
+fi
+
+echo "Processing GTF file: $input_gtf"
+
+# Create temporary directory
+temp_dir=$(mktemp -d)
+trap 'rm -rf "$temp_dir"' EXIT
+
+# Create header file
+cat <<-'EOF' > "$temp_dir/header.txt"
+#gtf-version 2.2
+#!genome-build mCalJa1.2.pat.X
+#!genome-build-accession NCBI_Assembly:GCF_011100555.1
+#!annotation-date 03/02/2023
+#!annotation-source NCBI RefSeq GCF_011100555.1-RS_2023_03
+###
+EOF
+
+# Check if input is gzipped
+if [[ "$input_gtf" == *.gz ]]; then
+    cat_cmd="gunzip -c"
+else
+    cat_cmd="cat"
+fi
+
+# Process non-chrM entries from modified GTF
+$cat_cmd "$modified_gtf" | grep -v "^chrM" > "$temp_dir/non_chrm.gtf"
+
+# Process chrM entries from original GTF
+$cat_cmd "$input_gtf" | \
+    grep "^chrM" | \
+    awk -F'\t' 'BEGIN{OFS="\t"} {
+        # Store the original attributes
+        attr=$9
+        
+        # Remove quotes
+        gsub(/"/, "", attr)
+        
+        # Process each attribute
+        n=split(attr, attrs, ";")
+        new_attrs=""
+        gene_id=""
+        has_gene_name=0
+        
+        for(i=1; i<=n; i++) {
+            # Skip empty fields
+            if(attrs[i] ~ /^[[:space:]]*$/) continue
+            
+            # Split into key-value
+            split(attrs[i], kv, " ")
+            key=kv[1]
+            val=kv[2]
+            
+            # Process ID fields
+            if(key ~ /_id$/) {
+                if(index(val, ".") > 0) {
+                    # Split version number
+                    split(val, ver, ".")
+                    val=ver[1]
+                    ver_key=substr(key, 1, length(key)-2) "_version"
+                    new_attrs = new_attrs "; " ver_key " \"" ver[2] "\""
+                }
+            }
+            
+            # Track if we have gene_name
+            if(key == "gene_name") has_gene_name=1
+            
+            # Store gene value
+            if(key == "gene") gene_val=val
+            
+            # Add to new attributes
+            new_attrs = new_attrs "; " key " \"" val "\""
+        }
+        
+        # Add gene_name if missing and we have gene
+        if(!has_gene_name && gene_val != "") {
+            new_attrs = new_attrs "; gene_name \"" gene_val "\""
+        }
+        
+        # Remove leading separator
+        sub(/^; /, "", new_attrs)
+        
+        # Output the modified line
+        $9=new_attrs
+        print
+    }' > "$temp_dir/modified_chrm.gtf"
+
+# Create MT gene annotations
+awk -F'\t' '
+$9 ~ /gene_id "MT-/ {
+    split($9, attrs, ";")
+    for (i in attrs) {
+        if (attrs[i] ~ /gene_id/) {
+            match(attrs[i], /"([^"]+)"/)
+            gene_id = substr(attrs[i], RSTART+1, RLENGTH-2)
+            
+            if (!(gene_id in start)) {
+                start[gene_id] = $4
+                end[gene_id] = $5
+                source[gene_id] = $2
+                chrom[gene_id] = $1
+                strand[gene_id] = $7
+                attr[gene_id] = $9
+            } else {
+                if ($4 < start[gene_id]) start[gene_id] = $4
+                if ($5 > end[gene_id]) end[gene_id] = $5
+            }
+        }
+    }
+}
+
+END {
+    for (gene_id in start) {
+        print chrom[gene_id] "\t" \
+              source[gene_id] "\t" \
+              "gene" "\t" \
+              start[gene_id] "\t" \
+              end[gene_id] "\t" \
+              "." "\t" \
+              strand[gene_id] "\t" \
+              "." "\t" \
+              attr[gene_id]
+    }
+}' "$temp_dir/modified_chrm.gtf" > "$temp_dir/mt_gene_annotation.txt"
+
+# Combine all parts into final output
+cat "$temp_dir/header.txt" \
+    "$temp_dir/non_chrm.gtf" \
+    "$temp_dir/modified_chrm.gtf" \
+    "$temp_dir/mt_gene_annotation.txt" > "$output_gtf"
+
+echo "Done! Processed GTF file has been written to: $output_gtf" 
\ No newline at end of file