13) Major genes related to genetic defects in breeding Flashcards
1
Q
Cause of muscular hypertrophy in cattle
A
- Myostatin gene mutation
- Recessive/maternal imprinting
- Cattle: Chromosome no. 2
2
Q
Cause of Callypige in sheep
A
- Maternal genomic imprinting
- Chromosome no. 18
3
Q
Muscular hypertrophy and callypige cause…
A
- Increased dystocia (difficult birth)
- Reduced fertility
Often in Belgian blue cattle
4
Q
Thermotolerance (heat-resistance) in cattle
A
- Production, sexual activity and reproduction decrease in heat stress
5
Q
Thermotolerance is caused by…
A
Thermotolerance genes: Heat shock protein (HSP70)
6
Q
Cattle breeds with thermotolerance
A
- Braman
- Senepol
- Romosinuano
7
Q
Stress sensitivity in swine is known as…
A
Porcine stress syndrome
8
Q
Stress sensitivity in swine is caused by…
A
- Ryanoid receptor gene (RYR1)
- On chromosome no. 6
9
Q
Symptoms of stress sensitivity
A
- Seizures
- Tremours
- Heart stop
