Re: Remine & Haldane on sci.bio.evolution

David Wilson wrote:
In article <e7rkoj$2qgt$1@xxxxxxxxxxxxxxxxxxx> on June 27th in
sci.bio.evolution "Perplexed in Peoria" <jimmenegay@xxxxxxxxxxxx> wrote:


Felsenstein recently mentioned a 1968 paper by Sved. Quoting from
the introduction of that paper:

Haldane (1957) was apparently the first to approach concisely
the problem of estimating evolutionary rates and to put forward
the view that the intensity of selection observed for most species
implied that there must be an upper limit to the possible rate
of their evolution. In discussing this point, he introduced the
notion of "the cost of natural selection". Assuming selection
to occur through the death in each generation of a constant
proportion of individuals carrying a particular gene, he calculated
that the total number of "selective deaths" occurring in the
replacement of that gene is of the order of 30 times the population
size, independent of the strength of selection involved. From
this he concluded that there could not be much more than one
substitution per genome per 300 generations on the average, based
on the view that most species could not tolerate a depression in
fitness of more than 10% per generation due to this cause. A
similar figure was accepted by Kimura ...


I reread the following:

http://www.talkorigins.org/indexcc/CB/CB121.html


so I just want to make sure I understand.

Am I correct in believing that the reference to "sexual recombination"
just means that you can break the population into small groups (say
little tribes spread all over one or more continents) and apply
Haldane's limit to each group.

Thus two separate groups could each evolve (and fix) a different
beneficial enhancement and then at a later time individuals from each
group could combine the characteristics.

Thus if there were 100 groups Haldane's limit could be multiplied by
100, from 1,667 to 166,700.

Do I have this right?


Cordially;

Friar Broccoli
Robert Keith Elias, Quebec, Canada Email: EliasRK (of) gmail * com
Best programmer's & all purpose text editor: http://www.semware.com

--------- I consider ALL arguments in support of my views ---------

.

Relevant Pages

  • Re: Remine & Haldane on sci.bio.evolution
    ... the problem of estimating evolutionary rates and to put forward ... introduced the notion of "the cost of natural selection". ... surving childhood instead of a 50% chance, and the result is a "cost"? ...
    (talk.origins)
  • Re: Evolutionary compassion
    ... The mess that gene centric Neo Darwinism has gotten itself into over the ... mathematical model of Darwinian theory. ... cell which in turn can only be derived from one fertile organism. ... No natural selection or sexual selection. ...
    (sci.bio.evolution)
  • Re: Ernst Mayr: Where Are We (1976)
    ... >> to determine when organism fitness altruism could evolve in nature, ... >> gene fitness been developed allowing a minimally VALID simplified ... selection exist is required to produce a valid theory of same. ... Understanding how gene fitness epistasis can be coded and inherited ...
    (sci.bio.evolution)
  • Re: Darwin, NeoDarwinian Taboos, and the Explanation of Evolution
    ... small random independent in fitness changes (gene mutations) ... in populations of genes under the action of natural selection. ... mono-centric Darwinism within which Total Darwinian Fitness ...
    (sci.bio.evolution)
  • Re: what is race?
    ... caucasoid / negroid / mongoloid terms. ... Some gene variants are known to ... process of selection and the passage of time. ...
    (uk.politics.misc)