Marker-assisted backcrossing using microsatellites and validation of SCAR Phs marker for resistance to white mold in common bean
Título del documento: Marker-assisted backcrossing using microsatellites and validation of SCAR Phs marker for resistance to white mold in common bean
Revista: Electronic journal of biotechnology
Base de datos: PERIÓDICA
Número de sistema: 000336143
ISSN: 0717-3458
Autores: 1
1
1
Instituciones: 1Universidade Federal de Lavras, Departamento de Biologia, Lavras, Minas Gerais. Brasil
Año:
Periodo: Nov
Volumen: 13
Número: 6
País: Chile
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Experimental, aplicado
Resumen en inglés Molecular markers may accelerate selection through the identification of plants with higher proportion of recurrent parent genome, as well as identifying those plants bearing target alleles like quantitative traits loci (QTLs) for white mold resistance. The objectives of this work were: 1) to employ microsatellite markers (SSR) in order to accelerate the recovery of recurrent parent genome 2) to validate sequence characterized amplified region (SCAR) Phs associated with a QTL that confers resistance to white mold, as previously identified in bean populations. Lines G122 and M20 were crossed, which generated 267 F1 plants from backcross (BC) BC1 and 113 plants from backcross BC2.SSR polymorphic markers were adopted. The relationship between BC plants and the recurrent parent was estimated based on the recurrent genome proportion (PR) in each BC plant, and the Sorensen-Dice genetic similarity (sgir). To determine how much the phenotypic variation is explained by SCAR Phs, 56 F1:2BC1 progenies were evaluated on the field following a random block design with two replications through the straw test method. SSR markers are efficient in identifying individuals with a greater proportion of the recurrent genome. SCAR Phs was not efficient for the indirect selection of common beans for white mold resistance
Disciplinas: Biología,
Agrociencias
Palabras clave: Angiospermas,
Fitopatología,
Biotecnología,
Selección genética,
Resistencia a plagas,
Marcadores moleculares,
Sclerotinia sclerotiorum,
Phaseolus vulgaris
Keyword: Biology,
Agricultural sciences,
Angiosperms,
Phytopathology,
Biotechnology,
Genetic selection,
Pests resistance,
Molecular markers,
Sclerotinia sclerotiorum,
Phaseolus vulgaris
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