Historic example of evolutionary quantitative geneticists, Biology

Assignment Help:

Define Historic Example of Evolutionary quantitative geneticists?

Evolutionary quantitative geneticists have developed tools to create predictions about the short-range evolution of traits that may be correlated with others. (Lynch and Walsh 1998). One of the most basic of these tools is the so-called "multivariate breeder's equation", ?z = Gβ: the modification in one trait (?z) is equal to the selection gradient acting on it and other traits (β) times the additive genetic variance- covariance (G) matrix (Lande and Arnold 1983) (the multivariate breeder's equation is an extension of the easy univariate breeder's equation that has long been utilized as a guideline by plant and animal breeders seeking to select artificially for economically valuable traits). The G matrix describes the patterns of genetic differences of traits and the genetic covariance among traits. Depending on details of the selection gradient and the G matrix, it is possible that a trait may evolve in the opposite direction from the direction it would develop in were it not correlated with other traits. For instance, Conner and Via (1992) examined body size evolution in flour beetles of the genus Tribolium. Selection operating on one character at a time would favor raised pupal weight but decreased male width. As these characters were positively correlated, though, pupal weight increased slightly and male width substantially increased-contrary to the expectation had just one of these traits been under selection.


Related Discussions:- Historic example of evolutionary quantitative geneticists

Insects - hormones in growth and reproduction, Insects - Hormones in Growth...

Insects - Hormones in Growth and Reproduction In insects hormones regulate moulting and metamorphosis. The larvae or nymphs which hatch out of the eggs undergo regular moultin

Enterocoelous pattern – coelom, Enterocoelous pattern – Coelom In ent...

Enterocoelous pattern – Coelom In enterocoelous development of coelom the mesoderm arises in the embryo as paired lateral pouches growing out from the archenteron. The pouche

What is the tree girdling, What is the tree girdling? What happens to the p...

What is the tree girdling? What happens to the plant when that girdle is removed from the stem (below the branches)? Tree girdling or Malpighi's girdling is the removal from a

Describe the concept of soil testing, Describe the concept of soil testing ...

Describe the concept of soil testing Different grades of complex and mixed fertilizers are being marketed to suit the soil and crops of a region. The recommendations are made o

Two biotic factors could affect an antelope, What two biotic factors could ...

What two biotic factors could affect an antelope living in the Serengeti? The biotic factors that may affect an antelope living in the Serengeti could be:predation by carnivore

Determine the structural classification of bone, Structural classification ...

Structural classification of bone Macroscopically, bone tissue can be classified into two types, compact and trabecular bone. Compact bone is dense, corticated and makes up the

The cell cycle, what happens to the liver cell during the cell cycle

what happens to the liver cell during the cell cycle

Define classification of fats and fatty acids, Define Classification of Fat...

Define Classification of Fats and Fatty Acids? You must be wondering in this unit on lipids why we are talking about fats and oils and not using the term lipids. Definitely whe

Mode of nutrition, What is the mode of nutrition of Ascaris?

What is the mode of nutrition of Ascaris?

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd