The intra-cultivar variability on water use efficiency at different water status as a target selection in grapevine: Influence of ambient and genotype
To face the challenges induces by the climate change a better water use in agriculture is needed. One of the ways to get it is the genetic selection and breeding programs of genotypes focused on their water use efficiency (WUE). Grapevine crop is commonly growing under water stress conditions; to improve their WUE is a general goal for viticulture. In this study, we show the variability in WUE among clones of Tempranillo, cvar, grown under both pot and field conditions, all submitted to a large range of water availability, and along three consecutive years. Leaf net photosynthesis rate (A), stomatal conductance (g) were measured, and intrinsic water use efficiency (WUE) was computed as the ratio A/g. Firstly, we observed that the WUE showed important variations among clones. Field-growing plants consistently showed higher WUE than pot growing ones, and an important year effect was observed. The differences among genotypes were significant in pot conditions, but not in field. Nevertheless, the present results show intra-cultivar variability in Tempranillo in WUE, and therefore the possibility to build a selection program based in this criterion.
| Main Authors: | , , , , , , |
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| Other Authors: | |
| Format: | artículo biblioteca |
| Published: |
Elsevier
2019-08-20
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| Subjects: | Vitis vinifera, Tempranillo, WUE, Stomatal conductance, Clonal selection, Water deficit, |
| Online Access: | http://hdl.handle.net/10261/202863 http://dx.doi.org/10.13039/501100011033 http://dx.doi.org/10.13039/501100003329 |
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