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Artificial selection for increased comb size and its effects on other sexual characters and viability in gallus-domesticus (the domestic chicken)

von Schantz, Torbjörn LU ; Tufvesson, Måns; Göransson, Görgen; Grahn, Mats LU ; Wilhelmson, Martin and Wittzell, Håkan LU (1995) In Heredity 75(5). p.518-529
Abstract
The expression of secondary ornaments is often positively correlated with the bearer's condition. So far no study has reported on consequences of directional selection on male sexual ornaments in birds, i.e. it is unknown to what extent male sexual traits are genetically correlated and whether selection for secondary ornaments affects viability. In this study we estimate phenotypic and genotypic parameters of three male sexual traits, namely comb size, spur length and testes mass, by using two different lines of domestic chickens (Gallus domesticus). One of the two lines had been artificially selected for large comb size during nine generations whereas the other line was a randomly mated control line. As a result of the selection, male... (More)
The expression of secondary ornaments is often positively correlated with the bearer's condition. So far no study has reported on consequences of directional selection on male sexual ornaments in birds, i.e. it is unknown to what extent male sexual traits are genetically correlated and whether selection for secondary ornaments affects viability. In this study we estimate phenotypic and genotypic parameters of three male sexual traits, namely comb size, spur length and testes mass, by using two different lines of domestic chickens (Gallus domesticus). One of the two lines had been artificially selected for large comb size during nine generations whereas the other line was a randomly mated control line. As a result of the selection, male comb size was almost doubled. Data from the selection line indicate that comb size was negatively genetically correlated with testes mass and spur length. The cockerels from the selection line had accordingly lighter testes and shorter spurs than cockerels from the control line. A simple mate choice experiment with females and males from both lines indicated that preferred males had a larger joint expression of comb size and spur length than nonpreferred males. Data from three different selection lines, all with enlarged comb size, clearly reveal a negative effect of comb size on male viability. (Less)
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author
organization
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type
Contribution to journal
publication status
published
subject
keywords
artificial selection, phasianus-colchicus, drosophila-melanogaster, mate choice, tits, male great, tail ornament size, female choice selects, red jungle fowl, viability, phenotypic correlations, ornaments, genetic correlations, male, domestic chicken, correlated responses, mating preferences, plumage coloration
in
Heredity
volume
75
issue
5
pages
518 - 529
publisher
Macmillan
external identifiers
  • scopus:0029506332
ISSN
1365-2540
DOI
10.1038/hdy.1995.168
language
English
LU publication?
yes
id
d5464e61-78af-4752-8cef-9029477ef350 (old id 1747846)
date added to LUP
2011-02-21 13:47:36
date last changed
2017-01-15 03:26:54
@article{d5464e61-78af-4752-8cef-9029477ef350,
  abstract     = {The expression of secondary ornaments is often positively correlated with the bearer's condition. So far no study has reported on consequences of directional selection on male sexual ornaments in birds, i.e. it is unknown to what extent male sexual traits are genetically correlated and whether selection for secondary ornaments affects viability. In this study we estimate phenotypic and genotypic parameters of three male sexual traits, namely comb size, spur length and testes mass, by using two different lines of domestic chickens (Gallus domesticus). One of the two lines had been artificially selected for large comb size during nine generations whereas the other line was a randomly mated control line. As a result of the selection, male comb size was almost doubled. Data from the selection line indicate that comb size was negatively genetically correlated with testes mass and spur length. The cockerels from the selection line had accordingly lighter testes and shorter spurs than cockerels from the control line. A simple mate choice experiment with females and males from both lines indicated that preferred males had a larger joint expression of comb size and spur length than nonpreferred males. Data from three different selection lines, all with enlarged comb size, clearly reveal a negative effect of comb size on male viability.},
  author       = {von Schantz, Torbjörn and Tufvesson, Måns and Göransson, Görgen and Grahn, Mats and Wilhelmson, Martin and Wittzell, Håkan},
  issn         = {1365-2540},
  keyword      = {artificial selection,phasianus-colchicus,drosophila-melanogaster,mate choice,tits,male great,tail ornament size,female choice selects,red jungle fowl,viability,phenotypic correlations,ornaments,genetic correlations,male,domestic chicken,correlated responses,mating preferences,plumage coloration},
  language     = {eng},
  number       = {5},
  pages        = {518--529},
  publisher    = {Macmillan},
  series       = {Heredity},
  title        = {Artificial selection for increased comb size and its effects on other sexual characters and viability in gallus-domesticus (the domestic chicken)},
  url          = {http://dx.doi.org/10.1038/hdy.1995.168},
  volume       = {75},
  year         = {1995},
}