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Governing grain protein concentration and composition in wheat and barley

use of genetic and environmental factors

Malik, Ali Hafeez (2012). Governing grain protein concentration and composition in wheat and barley. Diss. (sammanfattning/summary) Alnarp : Sveriges lantbruksuniv., Acta Universitatis agriculturae Sueciae, 1652-6880 ; 2012:55
ISBN 978-91-576-7702-0
[Doctoral thesis]

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Abstract

For commercial production of wheat and barley, grain yield (GY), grain protein concentration (GPC) and protein composition are considered important. Genetic (G) and environmental (E) factors are important constraints affecting GPC and protein composition in wheat and barley. This thesis examined the options to govern GPC and protein composition in wheat and barley grain by using G and E factors. The results showed that combination of G and E factors played an important role, more important than single factors solely, to determine GPC, protein composition, accumulation and protein breakdown in wheat and barley grains. Differences in maturation times of wheat and barley plants, due to variation in G and E factors, were found to be a significant factor in determining GPC and protein composition. By governing the maturation times, using different genotypes, N application rates and timings, pre- and post-anthesis temperature, the options to govern GPC and protein composition increased. Early maturing cultivars, N application at anthesis and high pre-anthesis temperature resulted in high amounts of sodium dodecyl sulphate (SDS)-extractable proteins (TOTE). Late maturing cultivars, N application at spike formation and high post-anthesis temperature resulted in high percentage of SDS- unextractable polymers into total polymers (%UPP). Pre-anthesis temperature influenced mainly TOTE, while post-anthesis temperature influenced mainly %UPP. Maturation time was found more important for determining GPC and protein composition at high temperature while at low temperature late nitrogen supply was of higher relevance. Differences in the build-up of TOTE and polymeric proteins were found to initiate from 12 days after anthesis and thereafter the build-up rate pertained throughout the grain maturation period. In barley, breakdown of proteins at malting were found dependent on plant maturation time and GPC i.e. higher breakdown rate at higher GPC. A negative correlation was found between GY and TOTE and between TOTE and %UPP. The results from this thesis help to understand how GPC, protein composition, accumulation and breakdown are governed in wheat and barley by various G and E factors. Moreover, the results may help in creating a simulation based quality model in which both G and E factors can be used to model GPC and protein composition in wheat and barley.

Authors/Creators:Malik, Ali Hafeez
Title:Governing grain protein concentration and composition in wheat and barley
Subtitle:use of genetic and environmental factors
Series/Journal:Acta Universitatis agriculturae Sueciae (1652-6880)
Year of publishing :26 July 2012
Volume:2012:55
Number of Pages:47
Papers/manuscripts:
NumberReferences
I.Ali Hafeez Malik, Allan Andersson, Ramune Kuktaite, Muhammad Yaqub Mujahid, Bismillah Khan and Eva Johansson (2012). Genotypic variation in dry weight and nitrogen concentration of wheat plant parts; relations to grain yield and grain protein concentration. (Manuscript).
II.Ali Hafeez Malik, Lena Holm and Eva Johansson (2012). Soil and starter fertiliser affect yield and protein composition of malting barley. (Submitted).
III.Ali Hafeez Malik, Maria Luisa Preito-Linde, Ramune Kuktaite, Allan Andersson and Eva Johansson (2011). Individual and interactive effects of genetic background and environmental conditions on amount and size distribution of polymeric proteins in wheat grain. Czech Journal of Genetics and Plant Breeding 47: S186-S189.
IV.Ali Hafeez Malik, Ramune Kuktaite and Allan Andersson. Individual and combined effect of pre- and post-anthesis temperature on grain yield and protein composition of two malting barley cultivars. (Manuscript)
V.Ali Hafeez Malik, Maria Luisa Preito-Linde, Ramune Kuktaite, Allan Andersson and Eva Johansson (2011). Individual and interactive effects of cultivar maturation time, nitrogen regime and temperature level on accumulation of wheat grain proteins. Journal of the Science of Food and Agriculture 91: 2192-2200.
VI.Ali Hafeez Malik, Lena Holm and Eva Johansson (2012). Governing plant development in barley: Relation to protein composition and break-down rates of the protein polymers during malting (Manuscript).
VII.Ali Hafeez Malik, Ramune Kuktaite and Eva Johansson (2012). Accumulation of proteins in the wheat grain: The combined effect of genetic and environmental factors and relation to bread-making quality. (Submitted).
Place of Publication:Alnarp
Publisher:Dept. of Agrosystems, Swedish University of Agricultural Sciences
ISBN for printed version:978-91-576-7702-0
ISSN:1652-6880
Language:English
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:F Plant production > F04 Fertilizing
F Plant production > F61 Plant physiology - Nutrition
F Plant production > F62 Plant physiology - Growth and development
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Agricultural Science
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Food Science
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 404 Agricultural Biotechnology > Genetics and Breeding
Agrovoc terms:triticum aestivum, wheats, hordeum vulgare, barley, grain, protein content, maturation, flowering, genetic variation, environmental factors
Keywords:End-use quality, grain filling period, Hordeum vulgare, maturation time, time to flowering, Triticum aestivum
URN:NBN:urn:nbn:se:slu:epsilon-e-571
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-571
ID Code:8956
Department:(LTJ, LTV) > Agrosystems (until 121231)
Deposited By: Ali Hafeez Malik
Deposited On:27 Jul 2012 08:10
Metadata Last Modified:02 Dec 2014 10:51

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