Ver ítem
- xmlui.general.dspace_homeCentros Regionales y EEAsCentro Regional CórdobaEEA ManfrediArtículos científicosxmlui.ArtifactBrowser.ItemViewer.trail
- Inicio
- Centros Regionales y EEAs
- Centro Regional Córdoba
- EEA Manfredi
- Artículos científicos
- Ver ítem
Selection of Contrasting Parents for Drought Tolerance in Sunfower (Helianthus Annuus L.)
Resumen
The aim of this research was select the best combination of contrasting parents to develop a mapping population for drought tolerance, based on phenotypic and genotypic data. Phenotyping was conducted in a greenhouse during 16 days at vegetative stage under well-watered (WW) and water-deficit (WD) conditions. Traits evaluated were: gain of leaf area (GLA), total water use (TWU), net assimilation rate (NAR), water use efficiency (WUE) and transpiration
[ver mas...]
The aim of this research was select the best combination of contrasting parents to develop a mapping population for drought tolerance, based on phenotypic and genotypic data. Phenotyping was conducted in a greenhouse during 16 days at vegetative stage under well-watered (WW) and water-deficit (WD) conditions. Traits evaluated were: gain of leaf area (GLA), total water use (TWU), net assimilation rate (NAR), water use efficiency (WUE) and transpiration rate (TR) response to vapor pressure deficit (VPD) (slope and breakpoint). Genotyping was performed with 127 SSR markers and a cluster analyses was conducted. An important interaction was observed for NAR, WUE and breakpoint in the VPD response. Under WD conditions, all genotypes showed lower GLA and TWU, whereas NAR and WUE increased its values. All genotypes showed reduction of the slope and breakpoint in high VPD
response on WD. PCA analysis explains the 80% of the total variability. PC1 discriminated HA89 and R419 due to a lower slope and higher breakpoint, while PC2 separated by water treatment based on the WUE and TWU values. Nighty nine SSR marker were amplified detecting 262 alleles. Cluster analyzes showed two main groups, one including HAR4 and B59 and the other one including five remaining genotypes. According to these results, only R419xHA64 and HA89xHAR4 had a greater genetic distance (1.08), besides a high polymorphism level between ILs (about 60%). Therefore, we conclude that these would be the best combination of contrasting parents to develop mapping populations for drought tolerance in sunflower.
[Cerrar]
Autor
Grandon, Nancy Gabriela;
Martin, Eugenia Alejandra;
Cicconi, Emmanuel;
Diaz, Carolina Del Pilar;
Mamani, Eva Maria Celia;
Moreno, Maria Valeria;
Descripción
Preprint
Fuente
Research Square: v1. 2021
Fecha
2021-12-20
Editorial
Research Square
ISSN
2693-5015 (online)
Formato
pdf
Tipo de documento
artículo
Palabras Claves
Derechos de acceso
Abierto
Excepto donde se diga explicitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)