Agronomic and physiological traits related to the genetic advance of semi-dwarf durum wheat: The case of Spain

Autor: Rut Sanchez-Bragado, José Luis Araus, N. Aparicio, Maria Dolores Serret, Maria Teresa Nieto-Taladriz, Fadia Chairi
Přispěvatelé: Ministerio de Economía y Competitividad (España), ICREA Academia del Gobierno Catalán (España), Chairi, Fadia, Sanchez-Bragado, Rut, Serret, Maria Dolores, Aparicio, Nieves, Nieto-Taladriz García, María Teresa, Luis Araus, José
Rok vydání: 2019
Předmět:
Zdroj: Dipòsit Digital de la UB
Universidad de Barcelona
ISSN: 1873-2259
2016-7652
Popis: 14 Pág.
Knowledge of the agronomic and physiological traits associated with genetic gains in yield is essential to improve understanding of yield-limiting factors and to inform future breeding strategies. The aim of this paper is to dissect the agronomic and physiological traits related to genetic gain and to propose an ideotype with high yield that is best adapted to Spanish Mediterranean environments. Six semi-dwarf (i.e. modern) durum wheat genotypes were grown in a wide range of growing conditions in Spain during two successive years. Diverse agronomic, physiological and leaf morphological traits were evaluated. Kernels spike-1 was the yield component most affected by the genetic gain. While no interaction between genotype and growing conditions existed for grain yield, the more productive genotypes were characterized by a plant height of around 85 cm, small erect flag leaves, more open stomata, a better balance between N sources and N sinks and a higher capacity to re-fix CO2 respired by the grain. Moreover, in general the non-laminar parts of the plants play a key role in providing assimilates during grain filling. The high heritability of most of the studied parameters allows their consideration as traits for phenotyping durum wheat better adapted to a wide range of Mediterranean conditions.
This study was supported by the Spanish project AGL2016-76527-R from MINECO, Spain. Fadia Chairi is the recipient of an FPI doctoral fellowship from the same institution. Jose Luis Araus acknowledges the support from the ICREA Academia of the Catalan Government, Spain.
Databáze: OpenAIRE
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