Abstract
ABSTRACT The aim of this study was to evaluate the influence of nitrogen (N) fertilization, environment and cultivars on the protein concentration, sodium dodecyl sulfate sedimentation test (SDSS) volume and falling number in wheat. The experimental design was a randomized blocks in split plot scheme with four repetions. Four wheat genotypes were evaluated under six N managements in four enviroment (subplots). The wheat genotypes evaluated were IPR Catuara TM, BRS Gaivota, Quartzo and CD 120. Protein concentration, SDS sedimentation test, falling number and grain yield were evaluated. Combined analysis of variance for the four environment was performed and means were compared by Tukey test at p ≤ 0.05. The environmental effect is greater than the genotype and N effects on protein concentration. The increase in protein concentration reduces grain yield of the cultivars tested. SDSS and falling number in wheat are influenced by the interaction between cultivar and environment and also by the N management. The protein concentration of grain has low influence on SDS sedimentation volume, so the topdressing N management has less accentuated effect on this response variable. The falling number does not vary among cultivars when the environment is suitable to pre-harvest sprouting. The use of topdressing N influences the falling number in wheat.
Highlights
There are several variables denoting the technological quality in wheat, which are influenced by the interaction between genotype and environment and by crop management (Denčić et al, 2011; Freo et al, 2011; Pinnow et al, 2013).Protein concentration in wheat grains is one of the most important variables in the analysis of quality attributes and is influenced by edaphoclimatic conditions such as temperature and availability of water and nutrients (Garrido-Lestache et al, 2004; Hrušková et al, 2006)
The present study aimed to evaluate the influence of N fertilization, environment and cultivars on protein concentration, sodium dodecyl sulfate sedimentation test (SDSS) and falling number in four wheat cultivars
The environment influenced the protein content (PC) of the cultivars IPR Catuara TM and Quartzo at all managements of N fertilization, whereas the PC of the cultivars BRS Gaivota and CD 120 was not influenced by the environment, regardless of the N managements (Table 3)
Summary
There are several variables denoting the technological quality in wheat, which are influenced by the interaction between genotype and environment and by crop management (Denčić et al, 2011; Freo et al, 2011; Pinnow et al, 2013).Protein concentration in wheat grains is one of the most important variables in the analysis of quality attributes and is influenced by edaphoclimatic conditions such as temperature and availability of water and nutrients (Garrido-Lestache et al, 2004; Hrušková et al, 2006). High temperatures during the grain filling period increase protein concentration, but reduce protein functionality (Gooding et al, 2003; Labuschagne et al, 2009). These effects lead to changes in gluten strength and in the sodium dodecyl sulfate sedimentation test (SDSS) (Tahir et al, 2006). The increase in protein concentration and gluten strength may be higher when N fertilization is performed in specific phases, adopting the splitting of N doses along the development of the wheat plant (Fuertes-Mendizábal et al, 2010)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Revista Brasileira de Engenharia Agrícola e Ambiental
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
