scholarly journals Natural selection drives leaf divergence in experimental populations of Senecio lautus under natural conditions

2019 ◽  
Vol 9 (12) ◽  
pp. 6959-6967 ◽  
Author(s):  
Thomas J. Richards ◽  
Daniel Ortiz‐Barrientos ◽  
Katrina McGuigan
Keyword(s):  
Natural Selection ◽  
Natural Conditions ◽  
Experimental Populations

scholarly journals A Method for the Direct Study of Natural Selection

1939 ◽  
Vol 16 (3) ◽  
pp. 278-285
Author(s):  
CECIL GORDON
Keyword(s):  
Drosophila Melanogaster ◽  
Natural Selection ◽  
Wild Type ◽  
Natural Conditions ◽  
Direct Study ◽  
Recessive Type ◽  
Selection Of

1. Decisive experiments on selection of mutants of Drosophila melanogaster can be carried out under natural conditions in Britain where this species is not indigenous. 2. This communication records an experiment in which a balanced population containing 25% ebony mutants was released in South Devon. 3. The frequency of the genotype among the descendants was estimated after a period equivalent to six discrete generations, by testing trapped flies, most of which were wild type in appearance, for heterozygosis. 4. The frequency estimated was very close to what would be deduced on the assumption that elimination of the recessive type before maturity was complete.

ANTAGONISM BETWEEN SEXUAL AND NATURAL SELECTION IN EXPERIMENTAL POPULATIONS OF SACCHAROMYCES CEREVISIAE

Evolution ◽  
2005 ◽  
Vol 59 (10) ◽  
pp. 2109 ◽  
Author(s):  
Clifford Zeyl ◽  
Ciara Curtin ◽  
Kristin Karnap ◽  
Elspeth Beauchamp
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Natural Selection ◽  
Experimental Populations

scholarly journals ANTAGONISM BETWEEN SEXUAL AND NATURAL SELECTION IN EXPERIMENTAL POPULATIONS OF SACCHAROMYCES CERVISIAE

Evolution ◽  
2005 ◽  
Vol 59 (10) ◽  
pp. 2109-2115 ◽  
Author(s):  
Clifford Zeyl ◽  
Ciara Curtin ◽  
Kristin Karnap ◽  
Elspeth Beauchamp
Keyword(s):  
Natural Selection ◽  
Experimental Populations ◽  
Saccharomyces Cervisiae

scholarly journals NATURAL SELECTION IN EXPERIMENTAL POPULATIONS OF TRIBOLIUM

Genetics ◽  
1960 ◽  
Vol 45 (10) ◽  
pp. 1317-1333
Author(s):  
Daniel J McDonald ◽  
Nancy Jane Peer
Keyword(s):  
Natural Selection ◽  
Experimental Populations

scholarly journals An Experimental Demonstration of Fisher's Principle: Evolution of Sexual Proportion by Natural Selection

Genetics ◽  
1998 ◽  
Vol 148 (2) ◽  
pp. 719-731
Author(s):  
Antonio Bernardo Carvalho ◽  
Michelle Cristina Sampaio ◽  
Flavia Roque Varandas ◽  
Louis Bernard Klaczko
Keyword(s):  
Natural Selection ◽  
Genetic Variability ◽  
Sex Ratio ◽  
Reproductive Effort ◽  
Meiotic Drive ◽  
Experimental Demonstration ◽  
Biological Phenomenon ◽  
Naturally Occurring ◽  
Experimental Populations ◽  
Fisher’S Principle

Abstract Most sexually reproducing species have sexual proportions around 1:1. This major biological phenomenon remained unexplained until 1930, when Fisher proposed that it results from a mechanism of natural selection. Here we report the first experimental test of his model that obeys all its assumptions. We used a naturally occurring X-Y meiotic drive system—the sex-ratio trait of Drosophila mediopunctata—to generate female-biased experimental populations. As predicted by Fisher, these populations evolved toward equal sex proportions due to natural selection, by accumulation of autosomal alleles that direct the parental reproductive effort toward the rare sex. Classical Fisherian evolution is a rather slow mechanism: despite a very large amount of genetic variability, the experimental populations evolved from 16% of males to 32% of males in 49 generations and would take 330 generations (29 years) to reach 49%. This slowness has important implications for species potentially endangered by skewed sexual proportions, such as reptiles with temperature sex determination.

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