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Genetic introgression and female mate choice within the Calendulauda albescens/C. barlowi hybrid zone
The hybrid zone between Calendulauda albescens and C. barlowi, located near the Orange River, contains a wide range of phenotypically intermediate individuals. This study examines the mitochondrial DNA of some of these individuals to determine if possible introgression is occuring from C. albescens...
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| Format: | Thesis |
| Language: | English |
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Department of Biological Sciences
2017
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| _version_ | 1867613156135665665 |
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| access_status_str | Open Access |
| author | Oatley, Graeme |
| author2 | Crowe, Timothy M |
| author_browse | Crowe, Timothy M Oatley, Graeme |
| author_facet | Crowe, Timothy M Oatley, Graeme |
| author_sort | Oatley, Graeme |
| collection | Thesis |
| description | The hybrid zone between Calendulauda albescens and C. barlowi, located near the Orange River, contains a wide range of phenotypically intermediate individuals. This study examines the mitochondrial DNA of some of these individuals to determine if possible introgression is occuring from C. albescens to C. barlowi. Mitochondrial DNA from 13 lark individuals found in the C. albescens/C. barlowi hybrid zone was analysed. A 358 base pair cytochrome-b sequence was obtained. The neighbour-joining phylogenetic tree obtained revealed two distinct clades, a C. albescens and C. barlowi clade. The C. barlowi clade was supported with a bootstrap value of 100. The C. albescens clade contained individuals of intermediate morphology, as represented by their hybrid index scores, indicating that intermediates between the two species contain the mitochondrial DNA of only one species, C. albescens. These results point at introgression from C. albescens to C. barlowi, with female C. albescens choosing to mate with male C. barlowi. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/26030 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:31:38.662Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2017 |
| publishDateRange | 2017 |
| publishDateSort | 2017 |
| publisher | Department of Biological Sciences |
| publisherStr | Department of Biological Sciences |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/26030 Genetic introgression and female mate choice within the Calendulauda albescens/C. barlowi hybrid zone Oatley, Graeme Crowe, Timothy M Botany Systematics and Biodiversity Sciences The hybrid zone between Calendulauda albescens and C. barlowi, located near the Orange River, contains a wide range of phenotypically intermediate individuals. This study examines the mitochondrial DNA of some of these individuals to determine if possible introgression is occuring from C. albescens to C. barlowi. Mitochondrial DNA from 13 lark individuals found in the C. albescens/C. barlowi hybrid zone was analysed. A 358 base pair cytochrome-b sequence was obtained. The neighbour-joining phylogenetic tree obtained revealed two distinct clades, a C. albescens and C. barlowi clade. The C. barlowi clade was supported with a bootstrap value of 100. The C. albescens clade contained individuals of intermediate morphology, as represented by their hybrid index scores, indicating that intermediates between the two species contain the mitochondrial DNA of only one species, C. albescens. These results point at introgression from C. albescens to C. barlowi, with female C. albescens choosing to mate with male C. barlowi. 2017-11-07T10:00:39Z 2017-11-07T10:00:39Z 2004 2017-02-22T12:49:44Z Bachelor Thesis Honours BSc (Hons) http://hdl.handle.net/11427/26030 eng application/pdf Department of Biological Sciences Faculty of Science University of Cape Town |
| spellingShingle | Botany Systematics and Biodiversity Sciences Oatley, Graeme Genetic introgression and female mate choice within the Calendulauda albescens/C. barlowi hybrid zone |
| thesis_degree_str | Bachelor's / Honours |
| title | Genetic introgression and female mate choice within the Calendulauda albescens/C. barlowi hybrid zone |
| title_full | Genetic introgression and female mate choice within the Calendulauda albescens/C. barlowi hybrid zone |
| title_fullStr | Genetic introgression and female mate choice within the Calendulauda albescens/C. barlowi hybrid zone |
| title_full_unstemmed | Genetic introgression and female mate choice within the Calendulauda albescens/C. barlowi hybrid zone |
| title_short | Genetic introgression and female mate choice within the Calendulauda albescens/C. barlowi hybrid zone |
| title_sort | genetic introgression and female mate choice within the calendulauda albescens c barlowi hybrid zone |
| topic | Botany Systematics and Biodiversity Sciences |
| url | http://hdl.handle.net/11427/26030 |
| work_keys_str_mv | AT oatleygraeme geneticintrogressionandfemalematechoicewithinthecalendulaudaalbescenscbarlowihybridzone |