Immunological factors inPeromyscus speciation
| Autor: | Sara C. Reuning, Mary-F. Finlay, Wallace D. Dawson |
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| Rok vydání: | 1982 |
| Předmět: |
Male
Peromyscus Genotype Placenta Transplantation Heterologous Intraspecific competition Andrology Fetus Species Specificity Pregnancy Animals Transplantation Homologous Conceptus Crosses Genetic Hybrid Sex Chromosomes biology Skin Transplantation General Medicine Interspecific competition Reproductive isolation biology.organism_classification Histocompatibility Immunology Hybridization Genetic Female Animal Science and Zoology |
| Zdroj: | Journal of Experimental Zoology. 224:1-12 |
| ISSN: | 1097-010X 0022-104X |
| DOI: | 10.1002/jez.1402240102 |
| Popis: | Reciprocal interspecific F1 hybrids of deermice (Peromyscus maniculatus) and oldfield mice (P. polionotus) differ significantly and substantially in fetal and placental, as well as adult, size and weight. Hybrid fetal mortality is associated with large conceptus size. Skin grafts were exchanged between and within the two species to ascertain whether any relationship exists between mean graft retention time and body size of fetuses and adults. P. maniculatus skin grafted to P. polionotus rejected significantly earlier than the reciprocal xenograft. All interspecific graft combinations rejected significantly earlier than intraspecific grafts. Pre-immunization of female P. maniculatus with con- and trans-specific paternal spleen cell antigens reduced fetal, placental, neonatal, and ten-day size compared with controls. Size, weight, fertility, and graft rejection data were compared with several theoretical models. The data were consistent with the hypothesis that immunological disparity between the species could produce marked size variations in reciprocal hybrids. Multiple minor histocompatibility factors can account for large placental size and fetal mortality in Peromyscus hybrids. Physiological reproductive isolation may result from immunological differences between closely allied species. |
| Databáze: | OpenAIRE |
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