Fecha/hora: 09/06/2024 04:10:56

Biblioteca(s): | INIA Las Brujas; INIA Tacuarembó.
Fecha corriente: | 24/03/2017
Fecha de la última actualización: | 26/01/2024
Autoria: | CONDON, F.; JAURENA, M.; REYNO, R.; OTAÑO, C.; LATTANZI, F.
Afiliación: | FEDERICO CONDON PRIANO, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; MARTIN ALEJANDRO JAURENA BARRIOS, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; RAFAEL ALEJANDRO REYNO PODESTA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; CARLOS ALBERTO OTAÑO LUNA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; FERNANDO A. LATTANZI, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay.
Título: | Spatial analysis of genetic diversity in a comprehensive collection of the native grass Bromus auleticus Trinius (ex Nees) in Uruguay.
Año de publicación: | 2017
Fuente/Imprenta: | Grass and Forage Science, 2017, Volume 72, Issue 4, pages 723-733. DOI:  https://doi.org/10.1111/gfs.12275
ISSN: | 0142-5242
DOI: | 10.1111/gfs.12275
Idioma: | Inglés
Notas: | Article history: Version of record online: 5 January 2017 // Manuscript Revised: 23 October 2016 // Manuscript Received: 29 December 2015

Contenido:

ABSTRACT.

Bromus auleticus Trinius (ex Nees) is a perennial allogamous C3 grass native to the Campos grasslands. It has potential to play a key role in restoration of both abandoned agricultural and overgrazed lands. We aim to reveal the existence of local adaptation and to assess whether phenotypes could be differentiated in relation to their ecogeographic region of origin. Previous reports estimated significant levels of variability among and within populations, but as yet there is no evidence of local adaptation and phenotypic relations with ecogeographic regions for this species. Indeed, there is a lack of knowledge about the spatial distribution of diversity, which limits the possibilities of using B. auleticus in ecological restoration and plant breeding. A comprehensive collection of 82 accessions of B. auleticus from eight ecogeographic regions within Uruguay was used to characterize diversity by measuring phenologic, morphologic, productive and reproductive traits. We found high diversity among B. auleticus accessions, and the spatial distribution of this diversity follows a pattern accounted by ecogeographic regions to a large extent. Our results also indicate large genotype × environment interaction, confirming local adaptation. Phenotypic values permitted, with a 3.7% error rate, discrimination of accessions according to their ecogeographic region of origin, suggesting the existence of differentiated ecotypes. We consider that the diversity observed should be conserved and used for breeding cultivars of this species and for the restoration of degraded grasslands by considering ecogeographic regions when selecting seed sources. 

© 2017 John Wiley & Sons Ltd.

Palabras-Clave: | FORAGE GENETIC RESOURCES; GEOGRAPHIC DIVERSITY ANALYSIS; LOCAL ADAPTATION.
Thesagro: | BROMUS AULETICUS; PASTURAS.

Categoría del tema:

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A50 Investigación agraria

Registro original: | INIA Las Brujas (LB)

Ejemplares:

LB - (101440-1) - PXI - AP - DD - PP/GFS/ 2017 -  -  - DIS
TBO - (101923-1) - PXI - AP - DD -  -  -  - DIS