| Revista: | Electronic journal of biotechnology |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000336237 |
| ISSN: | 0717-3458 |
| Autores: | Leite, Monik Evelin1 Santos, Joao Bosco dos1 Carneiro, Flavia Fernandes1 Couto, Karla Rodrigues1 |
| Instituciones: | 1Universidade Federal de Lavras, Departamento de Biologia, Lavras, Minas Gerais. Brasil |
| Año: | 2011 |
| Periodo: | Ene |
| Volumen: | 14 |
| Número: | 1 |
| País: | Chile |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental, aplicado |
| Resumen en inglés | Natural selection acts to select better adapted individuals or alleles in segregating population and help plant breeding. The objective of this work was to verify the effect of natural selection on microsatellite alleles as indicators of better adaptation and identification of quantitative trait loci (QTLs) for grain yield. This study evaluated 107 progenies from the F8 and 107 from the F24 generation derived from crossing Carioca MG and ESAL 686 lines, carried out by the bulk method, and evaluated in three different seasons: winter 2001; rainy 2001 and dry 2002. It was utilized 22 polymorphic markers and the natural selection acted in all of them. The frequency of the alleles of the parent Carioca MG, the most adapted, was increased in all of the 22 loci in F8 and 19 loci in F24. Selection affected each locus with different intensities in different generations. All of the selected alleles can be important for breeding program. QTLs were identified in generation F8 and F24 at varied magnitudes. The best marker PVttc002 explained 11.76% of variation in grain yield. However, an elevated interaction between QTLs and the environments was observed, showing the great difficulty in assisted selection |
| Disciplinas: | Biología, Agrociencias |
| Palabras clave: | Genética, Leguminosas, Alelos, Microsatélites, Selección natural, Rendimiento de grano, Frijol, Phaseolus vulgaris, Adaptación |
| Keyword: | Biology, Agricultural sciences, Genetics, Legumes, Alleles, Microsatellites, Natural selection, Grain yield, Bean, Phaseolus vulgaris, Fitness |
| Texto completo: | Texto completo (Ver PDF) |
