dc.contributor | Universidade Estadual Paulista (Unesp) | |
dc.contributor | Universidade de São Paulo (USP) | |
dc.contributor | Central European Institute of Technology—Veterinary Research Institute | |
dc.date.accessioned | 2021-06-25T11:10:53Z | |
dc.date.accessioned | 2022-12-19T22:40:02Z | |
dc.date.available | 2021-06-25T11:10:53Z | |
dc.date.available | 2022-12-19T22:40:02Z | |
dc.date.created | 2021-06-25T11:10:53Z | |
dc.date.issued | 2021-02-01 | |
dc.identifier | Genes, v. 12, n. 2, p. 1-16, 2021. | |
dc.identifier | 2073-4425 | |
dc.identifier | http://hdl.handle.net/11449/208359 | |
dc.identifier | 10.3390/genes12020165 | |
dc.identifier | 2-s2.0-85100192769 | |
dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/5388956 | |
dc.description.abstract | Chromosomal polymorphism plays a major role in speciation processes in mammals with high rates of karyotypic evolution, as observed in the family Cervidae. One remarkable example is the genus Mazama that comprises wide inter-and intra-specific chromosomal variability. To evaluate the impact of chromosomal polymorphisms as reproductive barriers within the genus Mazama, inter-specific hybrids between Mazama gouazoubira and Mazama nemorivaga (MGO × MNE) and intra-specific hybrids between cytotypes of Mazama americana (MAM) differing by a tandem (TF) or centric fusion (Robertsonian translocations—RT) were evaluated. MGO × MNE hybrid fertility was evaluated by the seminal quality and testicular histology. MAM hybrids estimation of the meiotic segregation products was performed by sperm-FISH analysis. MGO × MNE hybrids analyses showed different degrees of fertility reduction, from severe subfertility to complete sterility. Regarding MAM, RT, and TF carriers showed a mean value for alternate segregation rate of 97.74%, and 67.23%, and adjacent segregation rate of 1.80%, and 29.07%, respectively. Our results suggested an efficient post-zygotic barrier represented by severe fertility reduction for MGO × MNE and MAM with heterozygous TF. Nevertheless, RT did not show a severe effect on the reproductive fitness in MAM. Our data support the validity of MGO and MNE as different species and reveals cryptic species within MAM. | |
dc.language | eng | |
dc.relation | Genes | |
dc.source | Scopus | |
dc.subject | Cytogenetics | |
dc.subject | Hybrids | |
dc.subject | Neotropical deer | |
dc.subject | Post-zygotic barrier | |
dc.subject | Sperm-FISH | |
dc.title | Chromosomal polymorphism and speciation: The case of the genus mazama (cetartiodactyla; cervidae) | |
dc.type | Artículos de revistas | |