The house mouse chromosomal hybrid zone in Valtellina (SO): a summary of past and present research
<strong>Abstract</strong> Karyotypic variation due to the centric (Robertsonian: Rb) fusion of chromosomes is a widespread phenomenon among small mammal species. In 1993, we described a house mouse chromosomal hybrid zone in Upper Valtellina (SO). Here, we found mice wit...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Associazione Teriologica Italiana
2000-09-01
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| Series: | Hystrix, the Italian Journal of Mammalogy |
| Subjects: | |
| Online Access: | http://www.italian-journal-of-mammalogy.it/article/view/4144 |
| _version_ | 1818187120377856000 |
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| author | Heidi Hauffe Jaroslav Piálek Jeremy Searle |
| author_facet | Heidi Hauffe Jaroslav Piálek Jeremy Searle |
| author_sort | Heidi Hauffe |
| collection | DOAJ |
| description | <strong>Abstract</strong> Karyotypic variation due to the centric (Robertsonian: Rb) fusion of chromosomes is a widespread phenomenon among small mammal species. In 1993, we described a house mouse chromosomal hybrid zone in Upper Valtellina (SO). Here, we found mice with 32 different karyotypes, including the standard, or all-acrocentric race (2n=40), four Rb races (2n=22-26) and 27 hybrid types (2n=23-39). This hybrid zone presents a unique opportunity to study the role of Rb fusions and races in speciation. We have been studying this dynamic hybrid system using a wide variety of techniques: karyology, histology, breeding, mark-recapture and DNA sequencing. All four Rb races appear to be closely related, but 40AA has probably been introduced recently into the valley. However, the fertility of laboratory-reared hybrids between several of these races (24UV, 26POS, 40AA) are lower than expected compared to homozygotes and previous studies. Effective subpopulation size and migration rates within and between villages are also relatively low. We discuss the use of these parameters to study the process of speciation in ongoing computer simulations. |
| first_indexed | 2024-12-11T23:05:59Z |
| format | Article |
| id | doaj.art-6c2159ef25384e70a967b4c3b2f4fe7f |
| institution | Directory Open Access Journal |
| issn | 0394-1914 1825-5272 |
| language | English |
| last_indexed | 2024-12-11T23:05:59Z |
| publishDate | 2000-09-01 |
| publisher | Associazione Teriologica Italiana |
| record_format | Article |
| series | Hystrix, the Italian Journal of Mammalogy |
| spelling | doaj.art-6c2159ef25384e70a967b4c3b2f4fe7f2022-12-22T00:46:56ZengAssociazione Teriologica ItalianaHystrix, the Italian Journal of Mammalogy0394-19141825-52722000-09-0111210.4404/hystrix-11.2-4144The house mouse chromosomal hybrid zone in Valtellina (SO): a summary of past and present researchHeidi HauffeJaroslav PiálekJeremy Searle<strong>Abstract</strong> Karyotypic variation due to the centric (Robertsonian: Rb) fusion of chromosomes is a widespread phenomenon among small mammal species. In 1993, we described a house mouse chromosomal hybrid zone in Upper Valtellina (SO). Here, we found mice with 32 different karyotypes, including the standard, or all-acrocentric race (2n=40), four Rb races (2n=22-26) and 27 hybrid types (2n=23-39). This hybrid zone presents a unique opportunity to study the role of Rb fusions and races in speciation. We have been studying this dynamic hybrid system using a wide variety of techniques: karyology, histology, breeding, mark-recapture and DNA sequencing. All four Rb races appear to be closely related, but 40AA has probably been introduced recently into the valley. However, the fertility of laboratory-reared hybrids between several of these races (24UV, 26POS, 40AA) are lower than expected compared to homozygotes and previous studies. Effective subpopulation size and migration rates within and between villages are also relatively low. We discuss the use of these parameters to study the process of speciation in ongoing computer simulations.http://www.italian-journal-of-mammalogy.it/article/view/4144Robertsonian racespeciationfertilitymark-recapture |
| spellingShingle | Heidi Hauffe Jaroslav Piálek Jeremy Searle The house mouse chromosomal hybrid zone in Valtellina (SO): a summary of past and present research Hystrix, the Italian Journal of Mammalogy Robertsonian race speciation fertility mark-recapture |
| title | The house mouse chromosomal hybrid zone in Valtellina (SO): a summary of past and present research |
| title_full | The house mouse chromosomal hybrid zone in Valtellina (SO): a summary of past and present research |
| title_fullStr | The house mouse chromosomal hybrid zone in Valtellina (SO): a summary of past and present research |
| title_full_unstemmed | The house mouse chromosomal hybrid zone in Valtellina (SO): a summary of past and present research |
| title_short | The house mouse chromosomal hybrid zone in Valtellina (SO): a summary of past and present research |
| title_sort | house mouse chromosomal hybrid zone in valtellina so a summary of past and present research |
| topic | Robertsonian race speciation fertility mark-recapture |
| url | http://www.italian-journal-of-mammalogy.it/article/view/4144 |
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