The effects of reproductive specialization on energy costs and fitness genetic variances in cyclical and obligate parthenogenetic aphids

Mauricio J. Carter, Jean Christophe Simon, Roberto F. Nespolo

Resultado de la investigación: Article

14 Citas (Scopus)

Resumen

Organisms with coexisting sexual and asexual populations are ideal models for studying the consequences of either reproductive mode on the quantitative genetic architecture of life-history traits. In the aphid Rhopalosiphum padi, lineages differing in their sex investment coexist but all share a common parthenogenetic phase. Here, we studied multiple genotypes of R. padi specialized either for sexual and asexual reproduction and compared their genetic variation in fitness during the parthenogenetic phase. Specifically, we estimated maintenance costs as standard metabolic rate (SMR), together with fitness (measured as the intrinsic rate of increase and the net reproductive rate). We found that genetic variation (in terms of broad-sense heritability) in fitness was higher in asexual genotypes compared with sexual genotypes. Also, we found that asexual genotypes exhibited several positive genetic correlations indicating that body mass, whole-animal SMR, and apterous individuals production are contributing to fitness.Hence, it appears that in asexual genotypes, energy is fully allocated to maximize the production of parthenogenetic individuals, the simplest possible form of aphid repertoire of life-histories strategies.

Idioma originalEnglish
Páginas (desde-hasta)1414-1425
Número de páginas12
PublicaciónEcology and Evolution
Volumen2
N.º7
DOI
EstadoPublished - 1 dic 2012

Huella dactilar

energy costs
genetic variance
aphid
Aphidoidea
genotype
fitness
Rhopalosiphum padi
cost
energy
genetic variation
life history
asexual reproduction
sexual reproduction
quantitative genetics
heritability
life history trait
body mass
genetic correlation
effect
rate

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Nature and Landscape Conservation

Citar esto

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The effects of reproductive specialization on energy costs and fitness genetic variances in cyclical and obligate parthenogenetic aphids. / Carter, Mauricio J.; Simon, Jean Christophe; Nespolo, Roberto F.

En: Ecology and Evolution, Vol. 2, N.º 7, 01.12.2012, p. 1414-1425.

Resultado de la investigación: Article

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