42) Crossing: discontinuous hybridization

Question 1

Discontinuous hybridisation

Answer 1

Two, three and four breed

Terminal crossings

Question 2

Three breed crossing

Answer 2

• Crossing 2 breeds to produce crossbred F1
• F1:
  
  • Inseminated by a 3 breed (terminal, end producer)
  • End product: Whole F2
• Frequent in pig + cattle breeding

Question 3

Four breed crossing

Answer 3

• Use 4 breeds
  
  • Mate A + B → Female F1 generation
  • Mate C + D → Male F1 generation
• F1_female + F1_male → F2 (ABCD)
• Typical in swine breeding