FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term male semi-sterile ID (Ontology) FBcv:0000371 (FlyBase CV)
Definition A phenotype that is a reduction in the ability of males to produce fertilized eggs as a result of mating to below 50% of wild-type.
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Records annotated with this term OR any of its CHILD TERMS
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Records annotated with this exact term (annotations to child terms are NOT included)
Data Class Field Records
Alleles (FBal)  PHENOTYPIC_CLASS     323
Insertions (FBti)  STERILITY      94
Constructs (FBtp)  PHENOTYPIC_CLASS      80
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Relevant FlyBase reports
 Alleles Insertions Constructs
 male semi-sterile (all annotations which use CV term, excluding "NOT" statements)     323     94     80
     male semi-sterile | conditional       3       --       3
     male semi-sterile | dominant       2       --       --
     male semi-sterile | dominant | progressive       2       --       --
     male semi-sterile | heat sensitive       7       --       4
     male semi-sterile | progressive      10      4      2
     male semi-sterile | progressive | heat sensitive       2       --       --
     male semi-sterile | recessive      59     13       --
     male semi-sterile | recessive | heat sensitive       1       --       --
     male semi-sterile | RU486 conditional       2       --       2
     male semi-sterile | temperature conditional       1       --       --
Spanning Tree (Parents/Children)
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  phenotype
   |__semi-sterile
       |__male semi-sterile  497 rec.
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