Affortit P., Effa-Effa B., Ndoye M. S., Moukouanga Daniel, Luchaire N., Cabrera-Bosquet L., Peralvarez M., Pilloni Raphael, Welcker C., Champion Antony, Gantet Pascal, Diedhiou A. G., Manneh B., Aroca R., Vadez Vincent, Laplaze Laurent, Cubry Philippe, Grondin Alexandre. (2022). Physiological and genetic control of transpiration efficiency in African rice, Oryza glaberrima Steud. Journal of Experimental Botany, [Early access], [15 p.]. ISSN 0022-0957.
Titre du document
Physiological and genetic control of transpiration efficiency in African rice, Oryza glaberrima Steud
Année de publication
2022
Auteurs
Affortit P., Effa-Effa B., Ndoye M. S., Moukouanga Daniel, Luchaire N., Cabrera-Bosquet L., Peralvarez M., Pilloni Raphael, Welcker C., Champion Antony, Gantet Pascal, Diedhiou A. G., Manneh B., Aroca R., Vadez Vincent, Laplaze Laurent, Cubry Philippe, Grondin Alexandre
Source
Journal of Experimental Botany, 2022,
[Early access], [15 p.] ISSN 0022-0957
In African rice, higher transpiration efficiency is associated with transpiration restriction that is itself controlled by root-shoot growth balance. Genes potentially controlling these traits were identified. Improving crop water use efficiency, the amount of carbon assimilated as biomass per unit of water used by a plant, is of major importance as water for agriculture becomes scarcer. In rice, the genetic bases of transpiration efficiency, the derivation of water use efficiency at the whole-plant scale, and its putative component trait transpiration restriction under high evaporative demand remain unknown. These traits were measured in 2019 in a panel of 147 African rice (Oryza glaberrima) genotypes known to be potential sources of tolerance genes to biotic and abiotic stresses. Our results reveal that higher transpiration efficiency is associated with transpiration restriction in African rice. Detailed measurements in a subset of highly contrasted genotypes in terms of biomass accumulation and transpiration confirmed these associations and suggested that root to shoot ratio played an important role in transpiration restriction. Genome wide association studies identified marker-trait associations for transpiration response to evaporative demand, transpiration efficiency, and its residuals, with links to genes involved in water transport and cell wall patterning. Our data suggest that root-shoot partitioning is an important component of transpiration restriction that has a positive effect on transpiration efficiency in African rice. Both traits are heritable and define targets for breeding rice with improved water use strategies.
Plan de classement
Sciences du monde végétal [076]
Description Géographique
AFRIQUE ; AFRIQUE DE L'OUEST
Localisation
Fonds IRD [F B010085227]
Identifiant IRD
fdi:010085227
