Comparative Performance of High-Yielding European Wheat Cultivars Under Contrasting Mediterranean Conditions.

Autor:	de Lima VJ; Laboratório de Melhoramento Genético Vegetal, Centro de Ciências e Tecnologias Agropecuárias (CCTA), Universidade Estadual do Norte Fluminense Darcy Ribeiro - UENF, Campos dos Goytacazes, Brazil., Gracia-Romero A; Integrative Crop Ecophysiology Group, Plant Physiology Section, Faculty of Biology, University of Barcelona, Barcelona, Spain.; AGROTECNIO (Center for Research in Agrotechnology), Lleida, Spain., Rezzouk FZ; Integrative Crop Ecophysiology Group, Plant Physiology Section, Faculty of Biology, University of Barcelona, Barcelona, Spain.; AGROTECNIO (Center for Research in Agrotechnology), Lleida, Spain., Diez-Fraile MC; Agro-Technological Institute of Castilla and Leon (ITACyL), Valladolid, Spain., Araus-Gonzalez I; Agro-Technological Institute of Castilla and Leon (ITACyL), Valladolid, Spain., Kamphorst SH; Laboratório de Melhoramento Genético Vegetal, Centro de Ciências e Tecnologias Agropecuárias (CCTA), Universidade Estadual do Norte Fluminense Darcy Ribeiro - UENF, Campos dos Goytacazes, Brazil., do Amaral Júnior AT; Laboratório de Melhoramento Genético Vegetal, Centro de Ciências e Tecnologias Agropecuárias (CCTA), Universidade Estadual do Norte Fluminense Darcy Ribeiro - UENF, Campos dos Goytacazes, Brazil., Kefauver SC; Integrative Crop Ecophysiology Group, Plant Physiology Section, Faculty of Biology, University of Barcelona, Barcelona, Spain.; AGROTECNIO (Center for Research in Agrotechnology), Lleida, Spain., Aparicio N; Agro-Technological Institute of Castilla and Leon (ITACyL), Valladolid, Spain., Araus JL; Integrative Crop Ecophysiology Group, Plant Physiology Section, Faculty of Biology, University of Barcelona, Barcelona, Spain.; AGROTECNIO (Center for Research in Agrotechnology), Lleida, Spain.
Jazyk:	angličtina
Zdroj:	Frontiers in plant science [Front Plant Sci] 2021 Jun 29; Vol. 12, pp. 687622. Date of Electronic Publication: 2021 Jun 29 (Print Publication: 2021).
DOI:	10.3389/fpls.2021.687622
Abstrakt:	Understanding the interaction between genotype performance and the target environment is the key to improving genetic gain, particularly in the context of climate change. Wheat production is seriously compromised in agricultural regions affected by water and heat stress, such as the Mediterranean basin. Moreover, wheat production may be also limited by the nitrogen availability in the soil. We have sought to dissect the agronomic and physiological traits related to the performance of 12 high-yield European bread wheat varieties under Mediterranean rainfed conditions and different levels of N fertilization during two contrasting crop seasons. Grain yield was more than two times higher in the first season than the second season and was associated with much greater rainfall and lower temperatures. However, the nitrogen effect was rather minor. Genotypic effects existed for the two seasons. While several of the varieties from central/northern Europe yielded more than those from southern Europe during the optimal season, the opposite trend occurred in the dry season. The varieties from central/northern Europe were associated with delayed phenology and a longer crop cycle, while the varieties from southern Europe were characterized by a shorter crop cycle but comparatively higher duration of the reproductive period, associated with an earlier beginning of stem elongation and a greater number of ears per area. However, some of the cultivars from northern Europe maintained a relatively high yield capacity in both seasons. Thus, KWS Siskin from the UK exhibited intermediate phenology, resulting in a relatively long reproductive period, together with a high green area throughout the crop cycle. Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. (Copyright © 2021 Lima, Gracia-Romero, Rezzouk, Diez-Fraile, Araus-Gonzalez, Kamphorst, Amaral Júnior, Kefauver, Aparicio and Araus.)
Databáze:	MEDLINE
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