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<h1 id="submitting-multiple-haplotype-as">Submitting Multiple Haplotype Assemblies</h1>
<ul>
<li><a href="#background">Background</a></li>
<li><a href="#specialdetails">Special details for haplotype assemblies</a></li>
<li><a href="#submit">How to submit</a></li>
<li>
<p><a href="#situations">Other situations</a></p>
<ul>
<li>
<p><a href="#adding">Artificially adding a sex chromosome to the other haplotype assembly</a></p>
</li>
<li>
<p><a href="#unresolved">Unresolved diploid</a></p>
</li>
<li>
<p><a href="#ancestral">Ancestral genome duplication or merge</a></p>
</li>
</ul>
</li>
</ul>
<h2 id="background">Background</h2>
<p>Advanced sequencing and assembly technologies now allow the sequencing
of a diploid individual and separation of its genome into two
assemblies, often called haplotypes. In some cases there is enough
information to assemble the maternal and paternal haplotypes from the
sequenced genome of the child (ie, the F1 individual). At GenBank we had
used the term 'pseudohaplotype' for all of these but we use 'haplotype' now.
FYI, the NCBI assembly types are defined in the <a href="https://www.ncbi.nlm.nih.gov/assembly/model/">Assembly Model</a>.</p>
<p>GenBank accepts these haplotypes as separate assemblies that are linked
to each other in the <a href="https://www.ncbi.nlm.nih.gov/assembly/">Assembly</a> resource. They can be retrieved by
searching, eg with "alternate pseudohaplotype"[Filter], or by using the
facets to filter search results.</p>
<h2 id="specialdetails">Special details for haplotype assemblies</h2>
<p>Haplotype assembly submissions are created like <a href="/genbank/genomesubmit">regular genome assemblies</a> with a
few exceptions. The special characteristics of the
haplotype assemblies of a sequenced polyploid genome are:</p>
<ul>
<li>
<p>They share the same BioSample, which corresponds to the individual
that was sequenced, not to a parental taxid</p>
</li>
<li>
<p>They have separate BioProjects</p>
</li>
<li>
<p>They have an umbrella BioProject that links those two data-level
BioProjects. This will be created by GenBank staff if one does not
already exist.</p>
</li>
<li>
<p>The relationship of the haplotypes must be asserted by the
submitter. The options are:</p>
<ul>
<li>
<p>Principal haplotype / Alternate haplotype, if one is much better
than the other</p>
</li>
<li>
<p>Haplotype 1 / Haplotype 2, if they are of similar quality</p>
<ul>
<li>When more than 2 haplotypes are present, use Haplotype 3 /
Haplotype 4 for the additional assemblies</li>
</ul>
</li>
<li>
<p>Maternal haplotype / Paternal haplotype, when that information is
known</p>
</li>
</ul>
</li>
<li>
<p>Can be submitted via the "Pseudohaplotypes of a diploid/polyploid assembly" option in the genome
submission portal, where the submitter is prompted to provide the
required information for the two assemblies AND to create the
BioProjects and the BioSample if they do not already exist.</p>
<ul>
<li><strong>NOTE</strong>: The submission wizard was updated in April so all the options are now available.</li>
</ul>
</li>
</ul>
<p>Recommendations for these assemblies:</p>
<ul>
<li>
<p>The BioSample should include an isolate name or number to
distinguish the sequenced individual from others of that species.
(this is a general recommendation for all eukaryotic genome
assemblies)</p>
</li>
<li>
<p>The Assembly Name should include information about
Principal/Alternate or Maternal/Paternal or other identifiers to
distinguish these two assemblies of an individual from each other.
For example, <em>bSteHir1.pri</em> &amp; <em>bSteHir1.alt</em> or <em>mCalJac1.pat</em> &amp;
<em>mCalJac1.mat</em> or <em>rPleGil1.0.hap1</em> &amp; <em>rPleGil1.0.hap2</em></p>
</li>
<li>
<p>If the mitochondrial genome was assembled and is present, it should be included in the Principal or Maternal assembly.</p>
</li>
</ul>
<p>An example of the two pseudohaplotypes of a diploid is the <em>Sterna
hirundo</em> genome in Umbrella BioProject <a href="https://www.ncbi.nlm.nih.gov/bioproject/PRJNA560234">PRJNA560234</a> with BioSample
SAMN12369541, Principal Assembly (PRJNA558062; WNMW00000000;
GCA_009819605.1) and Alternate Assembly (PRJNA558063; WNMX00000000;
GCA_009819645.1)</p>
<h2 id="submit">How to submit</h2>
<p>[1] In the simple case <a href="/genbank/genomesubmit/#fasta">fasta files</a> can be uploaded because there is no
annotation and having the same linkage_evidence for all the gaps is
acceptable. However, if annotation or different kinds of gaps are
included, then you will need to use the command line program table2asn to create
an ASN (.sqn) file, as explained in the <a href="/genbank/genomesubmit/#sqn">Genome Submission Guide</a>. </p>
<p>[2] If any of the sequences belong to chromosomes or organelles and the "Batch" or "Pseudohaplotypes
of a diploid/polyploid assembly" submission option is used, then that assignment information must be included in the
definition lines of the fasta sequences, as described at <a href="https://www.ncbi.nlm.nih.gov/genbank/genomesubmit/#batch_assignment">'IMPORTANT: Additional requirements for batch submissions'</a>.
Specifically:</p>
<ul>
<li>
<p>Unlocalized organelle sequence, use [location=xxx], eg:</p>
<ul>
<li>
<p>[location=mitochondrion]</p>
</li>
<li>
<p>[location=chloroplast]</p>
</li>
</ul>
</li>
<li>
<p>The complete circular organelle sequence, then add the topology and
completeness, eg:</p>
<ul>
<li>[location=mitochondrion] [completeness=complete] [topology=circular]</li>
</ul>
</li>
<li>
<p>Unlocalized sequence that belongs to a chromosome, eg chromosome 2:</p>
<ul>
<li>[chromosome=2]</li>
</ul>
</li>
<li>
<p>The sequence represents the chromosome, even if gaps may be present,
then add the location:</p>
<ul>
<li>[location=chromosome] [chromosome=2]</li>
</ul>
</li>
</ul>
<p>[3] If the files are very big, you may want to upload them before you
begin your genome submission, as described at
<a href="https://www.ncbi.nlm.nih.gov/genbank/preloadfiles/">https://www.ncbi.nlm.nih.gov/genbank/preloadfiles/</a>. FYI, this is the
same process that exists for preloading files for SRA submissions or any
genome submission.</p>
<p>[4] To submit the haplotypes of an individual, start a new submission
in the <a href="https://submit.ncbi.nlm.nih.gov/subs/genome/">Genomes Submission Portal</a>.</p>
<p>A. If no AGP file is included, then choose the "<strong>Pseudohaplotypes of a
diploid/polyploid assembly"</strong> option. During the submission process you
will be prompted to provide the required assembly information. </p>
<p>If there are
multiple assembly methods, then you must use the embedded table option
on the GENOME INFO tab to provide this information for each haplotype in
the submission. </p>
<p>Here is the information that is collected:</p>
<ul>
<li>
<p>BioSample accession, or sample_name if you create the BioSample
during this submission</p>
</li>
<li>
<p>Type of haplotype</p>
</li>
<li>
<p>BioProject accessions, or BioProject descriptions if you create them
during this submission</p>
</li>
<li>
<p>Umbrella BioProject accession, if it has already been created</p>
</li>
<li>
<p>filename : exact name of the file that will be uploaded (all files
in this submission must be the same format, either fasta or ASN)</p>
</li>
<li>
<p>Assembly date (Optional): approximate date the assembly was created,
format is YYYY-MM-DD; YYYY-MM; or YYYY</p>
</li>
<li>
<p>Assembly name (Optional but strongly recommended for these)</p>
<ul>
<li>Include information about Principal/Alternate or
Maternal/Paternal or other identifiers to distinguish these two
assemblies of an individual from each other.</li>
<li>
<p>For example,</p>
<ul>
<li>
<p><em>bSteHir1.pri</em> &amp; <em>bSteHir1.alt</em></p>
</li>
<li>
<p><em>mCalJac1.pat</em> &amp; <em>mCalJac1.mat</em> </p>
</li>
<li>
<p><em>rPleGil1.0.hap1</em> &amp; <em>rPleGil1.0.hap2</em></p>
</li>
</ul>
</li>
</ul>
</li>
<li>
<p>Assembly method and version: name(s) and version(s) of the assembly algorithm(s)</p>
</li>
<li>
<p>Genome coverage</p>
</li>
<li>
<p>Sequencing technology or technologies</p>
</li>
<li>
<p>Reference genome if it is not a de novo assembly</p>
</li>
<li>
<p>Update: accession of the genome being updated, when appropriate</p>
</li>
</ul>
<p>B. If an AGP file is included, then you will need to submit each assembly
individually with the "Single" option. In this case, include a statement
in the comment box to tell us:</p>
<ul>
<li>
<p>that this is one haplotype of a diploid genome</p>
</li>
<li>
<p>whether this is the Principal/Alternate or Haplotype 1/Haplotype 2
or Maternal/Paternal haplotype</p>
</li>
<li>
<p>what the umbrella BioProject is, if one has already been created</p>
</li>
</ul>
<p><strong>NOTE</strong> it is frequently preferred to submit the chromosome and
unplaced and unlocalized scaffolds as gapped sequences instead of
submitting contigs plus an AGP file to make scaffolds and chromosomes
from those contigs, so keep that option in mind.</p>
<h2 id="situations">Other situations</h2>
<h3 id="adding">Artificially adding a sex chromosome to the other haplotype assembly</h3>
<p>Sometimes the assembly methodology creates separate sequences for the two haplotypes of a genome but
the submitter wants both sex chromosomes in a single assembly. If the assembly includes sequences from multiple haplotypes, it would not be submitted using the diploid option in the submission portal. Instead, create a regular genome submission using either the <a href="/genbank/genomesubmit/#single">Single</a> or <a href="/genbank/genomesubmit/#batch">Batch</a> option. If the two separate haplotype assemblies will also be submitted, use a single BioSample for all of the assemblies but a different BioProject for each assembly (one for the combined assembly, another for the first haplotype and a third for the other haplotype). When submitting such an assembly, include a note in the comment box to inform
the GenBank staff what assemblies are being submitted. Note that the SRA reads should use the same BioSample and could have the same BioProject of
one of those assemblies, if desired.</p>
<h3 id="unresolved">Unresolved diploid</h3>
<p>Sometimes the assembly methodology creates separate sequences for the two haplotypes of a genome but
the submitter is not able to distinguish them into two haplotypes. This type of genome assembly is
an Unresolved diploid assembly, and is submitted with the Single or Batch submission option, whichever
is the most appropriate. When submitting such an assembly, include a note in the comment box to inform
the GenBank staff that it is an Unresolved diploid.</p>
<h3 id="ancestral">Ancestral genome duplication</h3>
<p>When an ancestral merge or duplication event has caused a species to
have multiple copies of its chromosomes, eg <em>Triticum aestivum</em> which has
A, B and D versions of 7 chromosomes, then the two haplotypes of that
genome would each have the full complement of chromosomes, eg 21 in the case of <em>T.aestivum</em> (plus any unplaced and unlocalized sequences).</p>
<p>If the sequences of the ancestral genomes were
resolved and submitted as separate assemblies (eg separate assemblies for the A, B, and D
chromosomes of <em>T.aestivum</em>, plus unplaced/unlocalized sequences), then those assemblies would be Partial genome
representations rather than haplotypes of the genome because each includes
only a subset of the organism's chromosomes. Therefore, those assemblies should be submitted in
the normal <a href="/genbank/genomesubmit/#single">Single</a> or <a href="/genbank/genomesubmit/#batch">Batch</a> genome submission and with <em>NO</em> as the answer to the "Full Representation" question in the submission form.</p>
</div>
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<h2 id="genome-resources">Genome Resources</h2>
<ul>
<li><a href="/genbank/wgs/">About WGS</a></li>
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<li><a href="https://www.ncbi.nlm.nih.gov/genome/annotation_prok/">NCBI Prokaryotic Genome Annotation Pipeline</a></li>
<li><a href="https://www.ncbi.nlm.nih.gov/assembly/agp/AGP_Specification/">AGP Format</a></li>
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