Water Stress Alters Physiological, Spectral and Agronomic Indexes of Wheat Genotypes

Cássio Jardim TAvares; Walter Q Quadros RibeiroJunior; Maria Lucrecia Gerosa Ramos; Lucas Felisberto Pereira; Onno Muller; Raphael Augusto das Chagas Noqueli Casari; Carlos Antonio Ferreira De Sousa; Anderson Rodrigo Da Silva

doi:10.20944/preprints202309.1197.v1

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preprints.org > biology and life sciences > agricultural science and agronomy > doi: 10.20944/preprints202309.1197.v1

Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Water Stress Alters Physiological, Spectral and Agronomic Indexes of Wheat Genotypes

Cássio Jardim TAvares

Walter Q Quadros RibeiroJunior

^* ,

Maria Lucrecia Gerosa Ramos

^* ,

Lucas Felisberto Pereira

Onno Muller

^* ,

Raphael Augusto das Chagas Noqueli Casari

Carlos Antonio Ferreira De Sousa

Anderson Rodrigo Da Silva

Version 1 : Received: 15 September 2023 / Approved: 18 September 2023 / Online: 19 September 2023 (05:47:28 CEST)

A peer-reviewed article of this Preprint also exists.

Tavares, C.J.; Ribeiro Junior, W.Q.; Ramos, M.L.G.; Pereira, L.F.; Muller, O.; Casari, R.A.C.N.; de Sousa, C.A.F.; da Silva, A.R. Water Stress Alters Physiological, Spectral, and Agronomic Indexes of Wheat Genotypes. Plants 2023, 12, 3571. Tavares, C.J.; Ribeiro Junior, W.Q.; Ramos, M.L.G.; Pereira, L.F.; Muller, O.; Casari, R.A.C.N.; de Sousa, C.A.F.; da Silva, A.R. Water Stress Alters Physiological, Spectral, and Agronomic Indexes of Wheat Genotypes. Plants 2023, 12, 3571.

Abstract

Selecting drought-tolerant and more water-efficient wheat genotypes is a research priority, spe-cifically in regions with irregular rainfall or areas where climate change is expected to result in reduced water availability. The objective of this work was to use high-throughput measurements with morphophysiological traits to characterize wheat genotypes in relation to water stress. Field experiments were conducted from May to September 2018 and 2019, using a sprinkler bar irriga-tion system to control water availability to eighteen wheat genotypes: BRS 254; BRS 264; CPAC 01019; CPAC 01047; CPAC 07258; CPAC 08318; CPAC 9110; BRS 394 (irrigated biotypes) and Aliança; BR 18_Terena; BRS 404; MGS Brilhante; PF 020037; PF 020062; PF 120337; PF 100368; PF 080492; TBIO Sintonia (rainfed biotypes). The water regimes varied from 22 to 100% of the crop evapotranspiration replacement. Water stress negatively affected gas exchange, vegetation indices and grain yield. High throughput variables TCARI, NDVI, OSAVI, SAVI, PRI, NDRE and GNDVI had higher correlation with yield and morphophysiological measurements. The drought re-sistance index indicated that genotypes Aliança BRS 254, BRS 404, CPAC 01019, PF 020062, and PF 080492 were more drought tolerant.

Keywords

Automation; Triticum aestivum; gas exchange; drought tolerance; high-throughput; Cerrado

Subject

Biology and Life Sciences, Agricultural Science and Agronomy

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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