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

Fallopian tube, Fallopian tube: There are two fallopian tubes connec...

Fallopian tube: There are two fallopian tubes connected to the uterus one on each side of it. The ovum released from the ovarian follicle enters the fallopian tube. Th

Explain simple sugar, Simple sugars are monosaccharides consisting of a si...

Simple sugars are monosaccharides consisting of a single polyhydroxy aldehyde or ketone unit. Their general formula is (CH 2 0) n (n=3 to 7).

Differences between nervous system of man and rabbit, DIFFERENCE S BETWEEN...

DIFFERENCE S BETWEEN MAN & RABBIT - S.NO .   1. M A N   Brain round RABBIT   Elongated 2. Olfa

Name the organism included in symbiotic nitrogen fixation, Name the organis...

Name the organism included in symbiotic nitrogen fixation. What are the components needed for this pure? Determine their role. Differentiate among inbreeding and heterosis. The

Essential and non – essential amino acids, Essential and Non – Essential Am...

Essential and Non – Essential Amino Acids The requirement of essential amino acids differs from organism to organism. Some bacteria require only one amino acid in sufficient q

Feeding on food masses, Normal 0 false false false EN-I...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Laws of cleavage, L A W S OF CLEAVAGE - 1. Sac's Law - According t...

L A W S OF CLEAVAGE - 1. Sac's Law - According this law, during cleavage each blastomere to form similar blastomere. New cleavae always take place at the right angle of th

The child''s response to hospitalization, The Child's Response to Hospitali...

The Child's Response to Hospitalization   The  factors influencing the response of  the child to hospitalization are the child's age, his personality, the preparation he receiv

Shapes - types of nursing units, Shapes: Nightingale Ward  In the 1...

Shapes: Nightingale Ward  In the 1940s,  this traditional nursing unit was based on  the long rectangle pavilion type ward and self-contained unit. This concept is establis

Vitro fertilization - human development, Vitro Fertilization - Human Develo...

Vitro Fertilization - Human Development In case a woman cannot conceive due to her uterine tubes are blocked she can become pregnant by means of in vitro fertilization. In thi

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