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Abstract:

Males with a larger thorax and narrower face were found to be favoured by directional sexual selection in a previous field cage experiment where Ceratitis capitata males from the Seib 6-96 genetic sexing strain competed with wild males from Alto Valle (Patagonia) for the possession of wild females. Targets of sexual selection, however, might differ between wild and laboratory females as a response to adaptation to mass-rearing conditions. To evaluate possible divergences on the targets of sexual selection as a by-product of adaptation to mass-rearing conditions, field cage tests were performed with both wild and laboratory females. To avoid possible bias due to correlation among the measured traits (eye length [EL], face width [FW], head width [HW], and thorax length [TL]), a multivariate analysis was applied. Consistent with the previous experiment, the results indicated that TL and FW are probable targets of directional sexual selection independently of female strain. However, laboratory females were less selective than wild ones. Additionally, correlational sexual selection was detected acting on the multivariate phenotype. The effects of correlational selection overlap with those of directional selection on each single trait. The analysis of mating pair characteristics showed patterns that do not match the expectations for a random mating system. The current analysis indicates that during mating pair formation two processes overlap. On the one hand, sexual selection favours males with larger size (TL) and narrower faces (FW). This effect occurs in both wild and laboratory females. In addition, assortative mating based on both phenotype and origin was also observed.

Registro:

Documento: Artículo
Título:Sexual selection on multivariate phenotype in wild and mass-reared Ceratitis capitata (Diptera: Tephritidae)
Autor:Rodriguero, M.S.; Vera, M.T.; Rial, E.; Cayol, J.-P.; Vilardi, J.C.
Filiación:Depto. Ecologia, Genet. y Evolucion, Fac. de Ciencias Exactas y Nat., Universidad de Buenos Aires, (1428) Buenos Aires, Argentina
Inst. de Genet., Ewald Favret, CNIA, INTA Castelar, CC25, (1712) Castelar, Argentina
International Atomic Energy Agency, Wagramerstrasse 5, A-1400 Vienna, Austria
Palabras clave:Assortative mating; Ceratitis capitata; Correlational selection; Female choice; Genetic sexing strains; Morphometric traits; morphometry; phenotype; sexual selection; Animals; Body Constitution; Ceratitis capitata; Female; Male; Multivariate Analysis; Selection (Genetics); Thorax; Capitata; Ceratitis; Ceratitis capitata; Diptera; Tephritidae
Año:2002
Volumen:89
Número:6
Página de inicio:480
Página de fin:487
DOI: http://dx.doi.org/10.1038/sj.hdy.6800170
Título revista:Heredity
Título revista abreviado:Heredity
ISSN:0018067X
CODEN:HDTYA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0018067X_v89_n6_p480_Rodriguero

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Citas:

---------- APA ----------
Rodriguero, M.S., Vera, M.T., Rial, E., Cayol, J.-P. & Vilardi, J.C. (2002) . Sexual selection on multivariate phenotype in wild and mass-reared Ceratitis capitata (Diptera: Tephritidae). Heredity, 89(6), 480-487.
http://dx.doi.org/10.1038/sj.hdy.6800170
---------- CHICAGO ----------
Rodriguero, M.S., Vera, M.T., Rial, E., Cayol, J.-P., Vilardi, J.C. "Sexual selection on multivariate phenotype in wild and mass-reared Ceratitis capitata (Diptera: Tephritidae)" . Heredity 89, no. 6 (2002) : 480-487.
http://dx.doi.org/10.1038/sj.hdy.6800170
---------- MLA ----------
Rodriguero, M.S., Vera, M.T., Rial, E., Cayol, J.-P., Vilardi, J.C. "Sexual selection on multivariate phenotype in wild and mass-reared Ceratitis capitata (Diptera: Tephritidae)" . Heredity, vol. 89, no. 6, 2002, pp. 480-487.
http://dx.doi.org/10.1038/sj.hdy.6800170
---------- VANCOUVER ----------
Rodriguero, M.S., Vera, M.T., Rial, E., Cayol, J.-P., Vilardi, J.C. Sexual selection on multivariate phenotype in wild and mass-reared Ceratitis capitata (Diptera: Tephritidae). Heredity. 2002;89(6):480-487.
http://dx.doi.org/10.1038/sj.hdy.6800170