Physiological and genetic control of transpiration efficiency in African rice, Oryza glaberrima Steud

Bibliographische Detailangaben
Veröffentlicht in:	Journal of experimental botany. - 1985. - 73(2022), 15 vom: 03. Sept., Seite 5279-5293
1. Verfasser:	Affortit, Pablo (VerfasserIn)
Weitere Verfasser:	Effa-Effa, Branly, Ndoye, Mame Sokhatil, Moukouanga, Daniel, Luchaire, Nathalie, Cabrera-Bosquet, Llorenç, Perálvarez, Maricarmen, Pilloni, Raphaël, Welcker, Claude, Champion, Antony, Gantet, Pascal, Diedhiou, Abdala Gamby, Manneh, Baboucarr, Aroca, Ricardo, Vadez, Vincent, Laplaze, Laurent, Cubry, Philippe, Grondin, Alexandre
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2022
Zugriff auf das übergeordnete Werk:	Journal of experimental botany
Schlagworte:	Journal Article Research Support, Non-U.S. Gov't Genome-wide association study high-throughput phenotyping rice roots transpiration Water 059QF0KO0R

Beschreibung
Zusammenfassung:	© The Author(s) 2022. Published by Oxford University Press on behalf of the Society for Experimental Biology. All rights reserved. For permissions, please email: journals.permissionsoup.com. 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
Beschreibung:	Date Completed 08.09.2022 Date Revised 20.10.2022 published: Print Citation Status MEDLINE
ISSN:	1460-2431
DOI:	10.1093/jxb/erac156