FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term female germline cyst ID (Ontology) FBbt:00007137 (Fly Anatomy)
Definition A cyst of female germ cells interconnected by ring canals. Each cyst originates from a single cystoblast which divides to form 16 cyst cells. These become enveloped in a follicle cell epithelium as they pass through region 2 of the germarium. Cysts that have left the germarium are termed egg chambers.[ FlyBase:FBrf0064777 ]
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Annotations
Records annotated with this term OR any of its CHILD TERMS
Records annotated with this exact term (annotations to child terms are NOT included)
Data Class Field Records
Alleles (FBal)  PHENOTYPE_MANIFEST_IN     144
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION       6
Insertions (FBti)  PHENOTYPE_MANIFEST_IN      16
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN      85
show Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records
 Full annotation statements 
Relevant FlyBase reports
 Alleles Genes Insertions Constructs
 female germline cyst (all annotations which use CV term, excluding "NOT" statements)     144     18     22     88
     female germline cyst | germline clone       9       --       2       --
     female germline cyst | germline clone | nutrition conditional       1       --       --       --
     female germline cyst | germline clone | oogenesis       1       --       --       --
     female germline cyst | germline clone | oogenesis | progressive       1       --       --       --
     female germline cyst | increased number       2       --       --       1
     female germline cyst | nutrition conditional       3       --       --       --
     female germline cyst | oogenesis       5       --       1       --
     female germline cyst | oogenesis stage S1       4       --       1       --
     female germline cyst | P-stage       1       --       1       --
     female germline cyst | progressive      11       --       2      6
     female germline cyst | somatic clone      11       --       1      6
     female germline cyst | temperature conditional       2       --       --       1
     female germline cyst | third instar larval stage       2       --       --       3
Spanning Tree (Parents/Children)
Only view relationship:
ovary
 |__ovariole___________________________
multi-tissue structure                 |
 |__germline cyst______________________|
female organism                        |
 |__female-specific anatomical entity__|
female-specific anatomical entity      |
 |__ovariole___________________________|
multicellular structure                |
 |__ovariole___________________________|
anatomical entity                      |
 |__female-specific anatomical entity__|
                                       female germline cyst  5683 rec.
                                        |__cyst cell of ovary 84 rec.
                                        |   |__cyst cell of female germline 2-cell cyst
                                        |   |__cyst cell of female germline 4-cell cyst
                                        |   |__cyst cell of female germline 8-cell cyst
                                        |   |__cyst cell of female germline 16-cell cyst(+) 20 rec.
                                        |__egg chamber 5501 rec.
                                        |   |__follicle cell(+) 2662 rec.
                                        |   |__nurse cell(+) 1323 rec.
                                        |   |__nurse cell associated follicular epithelium(+) 81 rec.
                                        |   |__oocyte(+) 1850 rec.
                                        |   |__oocyte associated follicular epithelium(+) 194 rec.
                                        |__female germline 2-cell cyst
                                        |   |__cyst cell of female germline 2-cell cyst
                                        |__female germline 4-cell cyst
                                        |   |__cyst cell of female germline 4-cell cyst
                                        |__female germline 8-cell cyst 6 rec.
                                        |   |__cyst cell of female germline 8-cell cyst
                                        |__female germline 16-cell cyst 28 rec.
                                        |   |__cyst cell of female germline 16-cell cyst(+) 20 rec.
                                        |__nurse cell ring canal 201 rec.
                                            |__nurse cell ring canal rim(+) 18 rec.
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Is a germline cyst
female-specific anatomical entity
Develops from cystoblast
Part of ovariole
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Synonyms
Secondary IDs
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