What is the proper term for hybrid vigor?
What is the proper term for hybrid vigor?
heterosis, also called hybrid vigour, the increase in such characteristics as size, growth rate, fertility, and yield of a hybrid organism over those of its parents. Plant and animal breeders exploit heterosis by mating two different pure-bred lines that have certain desirable traits.
What is hybrid vigor trait?
Hybrid vigor is the increase in certain characteristics like growth rate, size, fertility, yield etc. of a particular hybrid organism over its parents. Hybrid vigor is also known by some other names, including heterosis and inbreeding enhancement.
What is hybrid vigour answer?
Solution : Hybrid vigour(heterosis)is the superiority of the hybrid over either parent in one or more characters.
What is hybrid vigor with example?
As examples, a mule is a hybrid between a horse and a donkey, and many farm and aquatic animals, including chicken, fish, and mussels, are raised as hybrids. The use of hybrid vigor or heterosis in maize (corn, Zea mays) has revolutionized plant breeding and production.
What are the three main types of heterosis?
Heterosis comes in three different forms: individual, maternal, and paternal. Bourdon (2000) explains that retained heterosis is the increase in performance of crossbred progeny relative to that of its purebred parents.
What is hybrid vigour Class 12?
Hint: Hybrid vigour or Heterosis, is the increase in characteristics of a hybrid organism such as size, growth rate, fertility, and yield over the parent generation. Complete answer : The increase in the traits of hybrid strength due to crossing over is called hybrid vigour or heterosis.
Why is hybrid vigour important?
Heterosis or hybrid vigor is a phenomenon where hybrid progeny have superior performance compared to their parental inbred lines. This is important in the use of F1 hybrid cultivars in many crops and vegetables. However, the molecular mechanism of heterosis is not clearly understood.
What are two basic theories of heterosis?
There are two main theories of heterosis and inbreeding depression. 1. Dominant hypothesis 2. Over dominance hypothesis.
Why is hybrid vigour?
Hybrid vigour (or hybrid vigor) is the improved activity and survival of hybrid offspring. The technical term in genetics is heterosis. Inbreeding in a normal population leads to the offspring getting worse, less fit, less fertile and usually not living as long as the parents.
Which type of heterosis where superiority of F1 plant over parent plants occurs?
Standard Heterosis
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.
What is hybrid vigour Byjus?
Hybrid vigour is the increased vigour of the offspring over their both parents. Such offsprings (hybrids) are obtained between two genetically different pureline varieties (parents).
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