Heterosis-definition & Hybrid vigour

  • Heterosis is the superiority of F1 (first generation offspring from cross) in one or more characters over mid parental or even better parental value.
Hybrid vigour
  • Another term used for heterosis is hybrid vigour.
  • Shull (1914) used this term for the first time. Whadely (1994) opined that two terms namely heterosis and hybrid vigour are erroneously used in synonyms to each other.
  • According to him heterosis refers to the developmental stimulation while Hybrid vigour’denotes the manifest effect of heterosis.
  • In short ‘Heterosis’ is the ‘influence’while hybrid vigour is its effect

Last modified: Monday, 2 April 2012, 4:30 PM