Período de permanência de espermatozoides em glândulas hospedeiras de espermatozoides e glândulas infundibulares em codorna de corte

Miranda, J.L.P.S.; Xavier, P.R.; Mahecha, Germán Arturo Bohórquez; Júnior, A.P. Marques

doi:10.1590/s0102-09352013000100004

Cited by 1 publication

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References 22 publications

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“…Therefore, experiments were conducted with 16 females from an experimental farm of the University of Castilla-La Mancha (Spain), which were descendants of admixed females backcrossed with wild Common quail males for about 20 generations, so they had domestic Japanese mitochondrial DNA (Barilani et al 2005) Quails were kept in aviaries during at least eight months before the start of the experiments, in order to get them habituated to captive conditions. They were moved to individual 20x20x20 cm cages fourteen days before the beginning of the experiments to ensure that no viable sperm was stored in females' SST (Birkhead and Fletcher 1994;Miranda et al 2013) and to avoid sperm depletion in males (Preston et al 2001). All experimental crosses were done during the natural breeding season of the Common quail (from the beginning of June to the end of July of 2010).…”

Section: Experimental Designmentioning

confidence: 99%

Postcopulatory sexual selection favors fertilization success of restocking hybrid quails over native Common quails (Coturnix coturnix)

et al. 2015

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Postcopulatory sexual selection plays an important role in the reproductive success of males in many species. Differences in fertilization success could affect rates of admixture and genetic introgression between divergent lineages. We investigated sperm precedence in matings in captivity involving Common quails (Coturnix coturnix) and farm quails of hybrid origin (C. coturnix x domestic Japanese quail, C. japonica), the last used in restocking practices to increase hunting bags. These interspecific matings in natural conditions are claimed to represent an important threat for the conservation of native Common quail populations. Results showed that fertilization success of each male depended on 1) the time it spent with the female, 2) the presence of sperm from a previous male in the female oviduct, 3) the time that the previous partner had been copulating with the female, and, most importantly, 4) the genetic origin of the male (wild or farm). Farm hybrid males showed higher fertilization success than wild Common males, they needed less time with the female to fertilize the same proportion of eggs. The presence of sperm from another male in the female oviduct reduced the percentage of fertilized eggs by a male. However, this reduction was higher for wild males when the precedent mate was a farm male. In summary, the sperm of farm hybrid males may outcompete the sperm of native males and this could be favoring the introgression of domestic Japanese alleles into the Common quail population, thus constituting a severe conservation threat to wild Common quail populations.

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