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Current Category » Principles of Plant Breeding

Comparison of Dominance and Overdominace Theories of Heterosis
 


Particulars

Dominance Hypothesis

Overdominace Hypothesis

Similarities

 

 

Effect of inbreeding

Inbreeding tends to decline in vigour

Also leads to decline in vigour

Out breeding

Out breeding restores vigour

Out breeding restores vigour

Parental diversity

Heterosis is associated with parental diversity.

Also associated with parental diversity

Control

Heterosis is controlled by genes

Also controlled by genes.

Difference

 

 

Causes of heterosis

Heterosis results due to masking effect of dominant desirable allele or over harmful recessive alleles. 

Heterosis results due to complementation between divergent alleles.

Current Category » Principles of Plant Breeding