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Type: Journal article
Title: Genetic control of grain yield and grain physical characteristics in a bread wheat population grown under a range of environmental conditions
Author: Maphosa, L.
Langridge, P.
Taylor, H.
Parent, B.
Emebiri, L.
Kuchel, H.
Reynolds, M.
Chalmers, K.
Okada, A.
Edwards, J.
Mather, D.
Citation: Theoretical and Applied Genetics: international journal of plant breeding research, 2014; 127(7):1607-1624
Publisher: Springer Verlag
Issue Date: 2014
ISSN: 0040-5752
Statement of
Lancelot Maphosa, Peter Langridge, Helen Taylor, Boris Parent, Livinus C. Emebiri, Haydn Kuchel, Matthew P. Reynolds, Ken J. Chalmers, Anzu Okada, James Edwards and Diane E. Mather
Abstract: KEY MESSAGE: Genetic analysis of the yield and physical quality of wheat revealed complex genetic control, including strong effects of photoperiod-sensitivity loci. Environmental conditions such as moisture deficit and high temperatures during the growing period affect the grain yield and grain characteristics of bread wheat (Triticum aestivum L.). The aim of this study was to map quantitative trait loci (QTL) for grain yield and grain quality traits using a Drysdale/Gladius bread wheat mapping population grown under a range of environmental conditions in Australia and Mexico. In general, yield and grain quality were reduced in environments exposed to drought and/or heat stress. Despite large effects of known photoperiod-sensitivity loci (Ppd-B1 and Ppd-D1) on crop development, grain yield and grain quality traits, it was possible to detect QTL elsewhere in the genome. Some of these QTL were detected consistently across environments. A locus on chromosome 6A (TaGW2) that is known to be associated with grain development was associated with grain width, thickness and roundness. The grain hardness (Ha) locus on chromosome 5D was associated with particle size index and flour extraction and a region on chromosome 3B was associated with grain width, thickness, thousand grain weight and yield. The genetic control of grain length appeared to be largely independent of the genetic control of the other grain dimensions. As expected, effects on grain yield were detected at loci that also affected yield components. Some QTL displayed QTL-by-environment interactions, with some having effects only in environments subject to water limitation and/or heat stress.
Keywords: Chromosomes, Plant
DNA, Plant
Chromosome Mapping
Microsatellite Repeats
Quantitative Trait Loci
Particle Size
Hot Temperature
Stress, Physiological
Genetic Linkage
Gene-Environment Interaction
Rights: © Springer-Verlag Berlin Heidelberg 2014
DOI: 10.1007/s00122-014-2322-y
Grant ID:
Appears in Collections:Agriculture, Food and Wine publications
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