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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID 		Fgf18+
wild type
MGI:2436603
Summary 2 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
cx1
 		Fgf18tm1Sjt/Fgf18+
Glg1Gt(KST005)Byg/Glg1+ 		B6.129-Glg1Gt(KST005)Byg Fgf18tm1Sjt MGI:4430496
cx2
 		Fgf18tm1Sjt/Fgf18+
Glg1Gt(KST005)Byg/Glg1Gt(KST005)Byg 		B6.129-Glg1Gt(KST005)Byg Fgf18tm1Sjt MGI:4430499


Genotype
MGI:4430496
cx1
Allelic
Composition		 Fgf18tm1Sjt/Fgf18+
Glg1Gt(KST005)Byg/Glg1+
Genetic
Background		 B6.129-Glg1Gt(KST005)Byg Fgf18tm1Sjt
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Fgf18tm1Sjt mutation (0 available); any Fgf18 mutation (12 available)
Glg1Gt(KST005)Byg mutation (1 available); any Glg1 mutation (68 available)
♀ phenotype observed in females
♂ phenotype observed in males
N normal phenotype
growth/size/body
decreased body weight ( J:157157 )
• males are smaller at 1 month and females are smaller by 3 months

limbs/digits/tail
abnormal tail morphology ( J:157157 )
• males are smaller at 1 month and females are smaller by 3 months




Genotype
MGI:4430499
cx2
Allelic
Composition		 Fgf18tm1Sjt/Fgf18+
Glg1Gt(KST005)Byg/Glg1Gt(KST005)Byg
Genetic
Background		 B6.129-Glg1Gt(KST005)Byg Fgf18tm1Sjt
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Fgf18tm1Sjt mutation (0 available); any Fgf18 mutation (12 available)
Glg1Gt(KST005)Byg mutation (1 available); any Glg1 mutation (68 available)
♀ phenotype observed in females
♂ phenotype observed in males
N normal phenotype
mortality/aging
postnatal lethality, incomplete penetrance ( J:157157 )
• mortality is similar to Glg1 single mutants

limbs/digits/tail
abnormal tail morphology ( J:157157 )
• tails of neonates are distorted

skeleton
abnormal skeleton morphology ( J:157157 )
• skeletal deformities are similar to those in Glg1 single mutants




Contributing Projects:
Mouse Genome Database (MGD), Gene Expression Database (GXD), Mouse Models of Human Cancer database (MMHCdb) (formerly Mouse Tumor Biology (MTB)), Gene Ontology (GO)
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Send questions and comments to User Support. 		last database update
01/06/2026
MGI 6.24 		The Jackson Laboratory