Fecha/hora: 16/06/2024 11:27:21

Biblioteca(s): | INIA Tacuarembó.
Fecha corriente: | 26/11/2019
Fecha de la última actualización: | 05/03/2020
Autoria: | DO CANTO, J.; STUDER, B.; FREI, U.; LÜBBERSTEDT, T.
Afiliación: | JAVIER DO CANTO FAGUNDEZ, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. 1Department of Agronomy, Iowa State University, Ames, IA, USA; BRUNO STUDER, Molecular Plant Breeding, Institute of Agricultural Sciences, ETH Zurich, Zurich, Switzerland.; URSULA FREI, Department of Agronomy, Iowa State.; THOMAS LÜBBERSTEDT, Department of Agronomy, Iowa State University, Ames, IA, USA.
Título: | Pattern of inheritance of a self-fertility gene in an autotetraploid perennial ryegrass (Lolium perenne) population.
Año de publicación: | 2020
Fuente/Imprenta: | Plant Breeding, 1 February 2020, Volume 139, Issue 1, Pages 207-213. Doi: 10.1111/pbr.12765
DOI: | 10.1111/pbr.12765
Idioma: | Inglés
Notas: | Article history: Received: 29 November 2018 // Revised: 31 March 2019 // Accepted: 13 September 2019.
Contenido: | Abstract: A mutation causing self-fertility (SF) in perennial ryegrass was studied at the tetraploid level. The aim of this work was to determine a) whether SF remains functional in a tetraploid population and b) whether the SF mutation expresses dominance in heterozygous pollen grains. A tetraploidized plant carrying SF alleles was self?pollinated to create a segregating F2 population. In the F2 individuals, pollen compatibility ranged between 38% and 84% showing that SF remained functional. The SF locus genotype was the main determinant of pollen compatibility explaining 78% of the variation. The observed segregation was significantly different from the expected under both SF being dominant or recessive models (P(x2)?0.001) and tended to be intermediate between them, indicating partial dominance or additive gene action. The frequency of the different genotypes suggested that pollen grains homozygous for the mutation have a competitive advantage over heterozygous pollen and that pollen compatibility is affected by the interaction with additional loci. The implications of our results for breeding polyploid grasses are discussed.
Palabras-Clave: | PERENNIAL RYEGRASS; SEGREGATION; SELF-FERTILITY; TETRAPLOID.
Categoría del tema: | A50 Investigación agraria
Registro original: | INIA Tacuarembó (TBO)
Ejemplares: | TBO - (103095-1) - PXI - AP - DD -  -  -  - DIS