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Table 1 Genotypes associated with a certain fertility phenotype, its amount and proportion [%] on total phenotype number. Data are extracted (May, 2016) from the database ‘Mouse Genome Informatics’ (

From: Selection for female traits of high fertility affects male reproductive performance and alters the testicular transcriptional profile

Mammalian phenotype (number of matching genotypes)  
Abnormal fertility/fecundity (2479 genotypes) total
Infertility (1462 genotypes) 59%
Reduced fertility (888 genotypes) 36%
Enhanced fertility (4 genotypes) 0.2%
Decreased litter size (441 genotypes) 18%
Increased litter size (25 genotypes) 1%