Some components of adaptive value of Drosophila pseudoobscura natural and indigenous populations in Mexico
The study of the components of adaptive value (fitness) in natural and / or experimental populations is relevant because they are raw material for adaptive evolution of organisms is polymorphic genetic variation and these components affect the mechanisms that maintain these polymorphisms which have...
| Autores: | , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2015 |
| País: | México |
| Institución: | UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO |
| Repositorio: | Revista Internacional de Contaminación Ambiental |
| Idioma: | español |
| OAI Identifier: | oai:ojs.pkp.sfu.ca:article/45966 |
| Acceso en línea: | https://www.revistascca.unam.mx/rica/index.php/rica/article/view/45966 |
| Access Level: | acceso abierto |
| Palabra clave: | Drosophila pseudoobscura components of adaptive value natural populations componentes de valor adaptativo poblaciones naturales |
| Sumario: | The study of the components of adaptive value (fitness) in natural and / or experimental populations is relevant because they are raw material for adaptive evolution of organisms is polymorphic genetic variation and these components affect the mechanisms that maintain these polymorphisms which have evolutionary significance. Drosophila pseudoobscura samples were obtained in 27 locations throughout the Republic anddivided for analysis into four north-south transects and taken to the laboratory where we studied the following components: fertility, measured as total number of offspring in seven days of lying divided by the number of females captured in a particular site; number of offspring per female, per day; egg to adult viability; sex ratio, calculated as follows: number of females between the number of males and multiplied by 100; mating ratio, is the number of matings in 30 minutes exposure and expressed in percentage; number of inversions encountered by population. The respective average values for them were: fecundity 5; offspring per day per female 8.5; egg-adult viability 24.4 %; sex ratio 71.9 males for every 100 females; 59.9 % and 6.5 inversions. These results are the number of captured females which ranged from four to 250 producing from 220 to 22 798 descendants; egg to adult viability had a variation of 14.3 to 38.4 percent; the sex ratio with a variation of 31.4 to 96.4; mating frequency varied from 38 to 76 percent and the number of inversions present four to nine. All differences found are considered adaptations of each population which allow their permanence in the different habitats. |
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