Mating system parameters in species of genus Prosopis (Leguminosae)
The section Algarobia of genus Prosopis involves important natural resources in arid and semiarid regions of the world. Their rationale use requires a better knowledge of their biology, genetics and mating system. There are contradictory information about their mating system. Some authors claim they...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2000 |
| País: | Argentina |
| Institución: | Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales |
| Repositorio: | Biblioteca Digital (UBA-FCEN) |
| Idioma: | inglés |
| OAI Identifier: | paperaa:paper_00180661_v132_n1_p19_Bessega |
| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_00180661_v132_n1_p19_Bessega |
| Access Level: | acceso abierto |
| Palabra clave: | alcohol dehydrogenase aminopeptidase esterase glutamate dehydrogenase isocitrate dehydrogenase oxidoreductase phosphogluconate dehydrogenase article gene structure genetic heterogeneity homozygote mating nonhuman plant Alleles Gene Frequency Genotype Heterozygote Inbreeding Isoenzymes Models, Genetic Pollen Reproduction Rosales |
| Sumario: | The section Algarobia of genus Prosopis involves important natural resources in arid and semiarid regions of the world. Their rationale use requires a better knowledge of their biology, genetics and mating system. There are contradictory information about their mating system. Some authors claim they are protogynous and obligate outcrosser. However, some evidence have been shown indicating that they might not be protogynous and that they might be somewhat self-fertile. The current paper analyses genetic structure and mating system parameters in populations of seven species of this section from South and North America based on isozyme data. In all species a significant homozygote excess was found in the offspring population but not in mother plant genotypes. Multilocus and mean single locus outcrossing rates (tm, ts) indicated that about 15 % selfing can occur in the studied populations. The heterogeneity between pollen and ovule allele frequencies was low suggesting population structuration, in agreement with the estimates of correlation of tm within progeny (rt) and correlation of outcrossed paternity (rp). The difference of F(IS) estimates between offspring and mother plants suggest some selection favouring heterozygotes between seedling and adult stages. |
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