Heterosis, zoology

2. Heterosis is estimated in three different ways:
• Mid parent heterosis
• Better parent heterosis
• Standard heterosis

3. Mid Parent Heterosis
• mean value of the two parents
• it is also known as average heterosis or relative heterosis and
calculated by using formula
• Mid Parent Heterosis = F1 - MP
MP
x 100

4. Better Parent Heterosis
• when the heterosis is estimated over the better parent is known as
better parent heterosis.
• it is also known as heteroblbeltiosis and calculated by using formula.
• Heterobeltiosis = F1 - BP x 100
BP

5. Standard Heterosis:
• it refers to the superiority of F1 over the standard commercial check
variety.
• it is also called as economic heterosis or useful heterosis and
calculated by using formula.
• Standard Heterosis = F1 - Check x 100
Check