Ulrich Witschi

The paper identifies a 1-bp deletion in QRICH2 as a recessive cause of low sperm count and immotile sperm with morphological abnormalities in Brown Swiss bulls.

The paper identifies four novel recessive QTL for male fertility in dairy cattle and prioritizes a missense variant in SPATA16 as a candidate causal variant.

The paper identifies a recessive allele in WDR19 associated with reduced semen quality and male fertility in cattle, showing it activates cryptic splicing and reduces protein expression.