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Differences in yield physiology between modern, well adapted durum wheat cultivars grown under contrasting conditions

Published on Sep 1, 2012in Field Crops Research 3.87
· DOI :10.1016/j.fcr.2012.07.015
Ariel Ferrante8
Estimated H-index: 8
(University of Lleida),
Roxana Savin18
Estimated H-index: 18
(University of Lleida),
Gustavo A. Slafer58
Estimated H-index: 58
(University of Lleida)
Cite
Abstract
Abstract Yield differences among wheat cultivars and its responsiveness to resource availability are usually related to grain number per m 2 , and further increases in grain number are required, but now beyond differences in time to anthesis and plant height (that are mostly optimised in traditional growing regions). The objective of this paper was to determine and quantify differences in yield physiology between different modern well adapted durum wheats grown in contrasting conditions (in addition we also tested if a higher amount of resources due to removal of competition could affect yield through the same determinants to nitrogen (N) availability). Four experiments were carried out during two growing seasons (2008–09 and 2009–2010); all in all under eight different growing conditions (Gc1–Gc8). In the first season four different modern cultivars were used and in the second season we selected the two highest-yielding cultivars, which differed in their responses to N in terms of spike fertility. Yield was closely related to biomass and N uptake due to both growing conditions and genotypic effects in all experiments. The existence of variation among modern cultivars in these yield determinants is relevant as further increases in yield must be achieved beyond further increases in partitioning. Yield differences among cultivars were based on their differences in grains per m 2 or average grain weight depending on which cultivars were compared. Overall grain number was related to spike dry weight at anthesis, and no evidences were found for a direct involvement of N in grain number determination, beyond the general effect of N availability on spike dry matter. However, this overall effect was mainly driven by growing conditions whilst differences between genotypes seemed associated with either spike dry weight at anthesis or fruiting efficiency, which varied significantly between cultivars. Interestingly, grain weight was consistently higher in the cultivars with lower fruiting efficiency than in cultivars maximising the number of grains set per unit of spike dry weight at anthesis suggesting a constitutive component for the commonly reported negative relationship between grain weight and grain number. In conclusion, the main differences in yield between modern, well adapted wheats were related to their biomass and N uptake and to the sink-strength during post-anthesis, being this strength increased either by having more grains or grains of potentially greater size, depending on the specific cultivar and as a consequence of a trade-off between fruiting efficiency and grain size.
  • References (56)
  • Citations (37)
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References56
Newest
Published on Apr 1, 2012in Field Crops Research 3.87
Anna Pedró4
Estimated H-index: 4
(University of Lleida),
Roxana Savin18
Estimated H-index: 18
(University of Lleida)
+ 1 AuthorsGustavo A. Slafer58
Estimated H-index: 58
(University of Lleida)
Abstract In order to identify genotypes of durum wheat expressing improved yield and determining whether selection for individual plant efficiency in producing grains would improve plant and crop yield, we firstly compared the performance of segregating mutants and control cultivars and then selected divergent lines for number of grains per unit stem length, representing extreme source-sink balances further characterising the offspring lines. Research included three field experiments with indivi...
Published on Feb 1, 2012in Field Crops Research 3.87
Victor O. Sadras50
Estimated H-index: 50
(South Australian Research and Development Institute),
Gustavo A. Slafer58
Estimated H-index: 58
(University of Lleida)
Abstract Yield components are relatively easy to measure and their interpretation is intuitive. However, strong environmental influences, genetic and physiological controls, and evolutionary constraints collectively lead to lack of independence among yield components that restrict their value in breeding and agronomic applications. Here, we first sketch a framework of plant responses to environmental factors to highlight the modulation of yield components by resources and their interplay with no...
Published on Jan 1, 2012in European Journal of Agronomy 3.38
Victor O. Sadras50
Estimated H-index: 50
(University of Adelaide),
Chris Lawson3
Estimated H-index: 3
(South Australian Research and Development Institute)
+ 1 AuthorsG. K. McDonald29
Estimated H-index: 29
(University of Adelaide)
Abstract In a worldwide context of agricultural intensification, cropping systems in Mediterranean-type environments have been reducing the frequency of long-fallow in a shift to continuous cropping. The focus of this paper is the short summer fallow between successive winter grain crops in environments of South Australia with winter-dominant rainfall. Our aims were to (i) estimate wheat yield response to summer rainfall, (ii) explain yield responses in terms of capture and efficiency in the use...
Published on Oct 1, 2011in Journal of Experimental Botany 5.36
Fernanda G. González14
Estimated H-index: 14
(CONICET: National Scientific and Technical Research Council),
Daniel J. Miralles31
Estimated H-index: 31
(UBA: University of Buenos Aires),
Gustavo A. Slafer58
Estimated H-index: 58
(University of Lleida)
Further improvements to wheat yield potential will be essential to meet future food demand. As yield is related to the number of fertile florets and grains, an understanding of the basis of their generation is instrumental to raising yield. Based on (i) a strong positive association between the number of fertile florets or grains and spike dry weight at anthesis; and (ii) the finding that floret death occurs when spikes grow at maximum rate, it was always assumed that floret survival depends on ...
Published on Jul 1, 2011in Euphytica 1.53
Anna Pedró4
Estimated H-index: 4
(University of Lleida),
Roxana Savin18
Estimated H-index: 18
(University of Lleida)
+ 1 AuthorsGustavo A. Slafer58
Estimated H-index: 58
(University of Lleida)
Further increasing yield potential remains one of the main objectives of wheat breeding, even in stressful environments. In general, past genetic gains were associated with increases in harvest index, and future gains should be related to greater biomass. Identifying genetic sources for such improvement may be relevant. Researchers of TRITIMED identified DH lines of durum wheat apparently possessing not only high yield potential but also good yield stability. We aimed to determine physiological ...
Published on Jan 1, 2011in Crop Science 1.64
Fernanda G. González14
Estimated H-index: 14
(CONICET: National Scientific and Technical Research Council),
Ignacio I. Terrile5
Estimated H-index: 5
(INTA: International Trademark Association),
M. O. Falcon1
Estimated H-index: 1
(UBA: University of Buenos Aires)
The identification of physiological traits that determine grain number (and yield) in modern cultivars, and the possible tradeoffs among them, may help to detect promising traits for breeding to increase yield potential. High-yielding Argentinean wheat (Triticum aestivum L.) cultivars were grown under irrigated and high-input conditions during two seasons to study (i) yield and grain number m ―2 (GN) as a result of stover biomass at harvest (SH) and harvest index (HI); and (ii) spike dry weight ...
Published on Jan 1, 2011in Journal of Experimental Botany 5.36
M. John Foulkes16
Estimated H-index: 16
(University of Nottingham),
Gustavo A. Slafer58
Estimated H-index: 58
(University of Lleida)
+ 6 AuthorsMatthew P. Reynolds61
Estimated H-index: 61
(CIMMYT: International Maize and Wheat Improvement Center)
A substantial increase in grain yield potential is required, along with better use of water and fertilizer, to ensure food security and environmental protection in future decades. For improvements in photosynthetic capacity to result in additional wheat yield, extra assimilates must be partitioned to developing spikes and grains and/or potential grain weight increased to accommodate the extra assimilates. At the same time, improvement in dry matter partitioning to spikes should ensure that it do...
Published on Jan 1, 2011in Crop & Pasture Science 1.33
R. A. Fischer1
Estimated H-index: 1
This review focuses on recent advances in some key areas of wheat physiology, namely phasic development, determination of potential yield and water-limited potential yield, tolerance to some other abiotic stresses (aluminium, salt, heat shock), and simulation modelling. Applications of the new knowledge to breeding and crop agronomy are emphasized. The linking of relatively simple traits like time to flowering, and aluminium and salt tolerance, in each case to a small number of genes, is being g...
Published on Oct 1, 2010in Journal of Experimental Botany 5.36
Ariel Ferrante8
Estimated H-index: 8
(University of Lleida),
Roxana Savin23
Estimated H-index: 23
(University of Lleida),
Gustavo A. Slafer58
Estimated H-index: 58
(University of Lleida)
In Mediterranean durum wheat production, nitrogen (N) fertilization may be important to stabilize and increase yields. Wheat yield responses to N fertilization are usually related to grains per m2, which in turn is the consequence of processes related to floret development (floret initiation followed by floret death/survival) during stem elongation. The literature is rather scarce in terms of the relevance of floret developmental dynamics, determining the final number of grains in general terms ...
Published on Mar 1, 2010in Cereal Research Communications 0.71
Y. Rharrabti5
Estimated H-index: 5
,
Daniel J. Miralles31
Estimated H-index: 31
+ 1 AuthorsL. F. García del Moral21
Estimated H-index: 21
The present work analysed whether grain weight is affected by changes in source:sink ratio in twenty-four durum wheat cultivars from Italy and Spain released through the 20 th century grown under Mediterranean conditions. For this purpose, a field experiment was conducted during the 2002 growing-season in southeastern Spain. Sink strength was modified by removing half of the spikelets, of one side of the spike, one week after anthesis. Spikelet trimming had different effects on both average grai...
Cited By37
Newest
Published on Sep 1, 2019in Field Crops Research 3.87
Roxana Savin18
Estimated H-index: 18
(University of Lleida),
Victor O. Sadras50
Estimated H-index: 50
(University of Adelaide),
Gustavo A. Slafer58
Estimated H-index: 58
(University of Lleida)
Abstract Water and temperature stress during critical periods of grain yield formation are distinctive of wheat crops in Mediterranean environments. However, nitrogen (N) availability may also constrain grain yields in these environments. Benchmarks of yield response to N uptake in Mediterranean conditions are lacking, and extrapolation from non-Mediterranean environments is not warranted. We hypothesised that under Mediterranean environments (1) maximum N uptake would be lower, thus the range o...
Published on May 1, 2019in Field Crops Research 3.87
Carolina Rivera-Amado1
Estimated H-index: 1
,
Carolina Rivera-Amado (CIMMYT: International Maize and Wheat Improvement Center)+ 3 AuthorsM. John Foulkes16
Estimated H-index: 16
Abstract Improving biomass is an important goal for future genetic gains in yield potential in wheat, but it will also be crucial to identify physiological traits to maximize harvest index (HI, proportion of aboveground biomass in grain). Increased grain partitioning will require increased dry-matter (DM) partitioning to the spikes at anthesis as well as enhanced fruiting efficiency (FE, grains per g spike dry matter at anthesis or chaff dry matter at harvest), whilst optimizing the partitioning...
Published on Apr 1, 2019in European Journal of Agronomy 3.38
Francesco Giunta19
Estimated H-index: 19
(University of Sassari),
Giovanni Pruneddu7
Estimated H-index: 7
(University of Sassari)
+ 1 AuthorsRosella Motzo19
Estimated H-index: 19
(University of Sassari)
Abstract Both durum and bread wheat are well adapted to Mediterranean environments where durum wheat is traditionally assigned to more stressful conditions. Twenty-seven cultivars of each species were grown under 4 environments in Sardinia (Italy) to characterize the differences in grain yield and protein between and within them. The large number of cultivars revealed large within-species variability in yield and no or just minor between-species differences, which indicated bread wheat as better...
Published on Apr 1, 2019in Molecular Genetics and Genomics 2.88
Gizaw M. Wolde2
Estimated H-index: 2
(Leibniz Association),
Martin Mascher25
Estimated H-index: 25
(Leibniz Association),
Thorsten Schnurbusch25
Estimated H-index: 25
(MLU: Martin Luther University of Halle-Wittenberg)
Crop yield is determined by the acquisition and allocation of photoassimilates in sink organs. Therefore, genetic modification of sink size is essential for understanding the complex signaling network regulating sink strength and source activities. Sink size in wheat depends on the number of spikelets per spike, floret/grain number per spikelet as well as the grain weight or dry matter accumulation. Hence, increasing spikelet number and improving sink size are targets for wheat breeding. The mai...
Published on Apr 1, 2019in Scientia Horticulturae 1.96
Abstract The aim of this study is to investigate the response of physiological functions, and to establish the model between net photosynthetic rate and some other physiological indexes during the eighteen water stress days and the three subsequent re-water days in different growth periods of tomato. Our data showed that the most of the photosynthetic indicators had the decline trend under water stress, and the value under mild water stress was higher than that of moderate water stress at the sa...
Published on Feb 1, 2019in Field Crops Research 3.87
Addy L. Garcia (University of Lleida), Roxana Savin18
Estimated H-index: 18
(University of Lleida),
Gustavo A. Slafer58
Estimated H-index: 58
(University of Lleida)
Abstract Grain number (GN) is critical for yield determination, and understanding its physiology may be instrumental to further improving yield. Studying similarities and differences in yield physiology among cereals may highlight physiological traits that might become critical for understanding some constitutive differences between them. Recently it has been proposed that fruiting efficiency (FE, grains set per unit of inflorescence dry weight at anthesis IDWa) would be a relevant trait to furt...
Published on Dec 1, 2018in Molecular Breeding 1.86
Weiping Shi3
Estimated H-index: 3
(Shanxi Agricultural University),
Linqi Yue (Shanxi Agricultural University)+ 7 AuthorsZHOUMei-xue37
Estimated H-index: 37
(Shanxi Agricultural University)
Kernel number per spike (KNPS) is one of the key factors affecting wheat yield, which can be significantly reduced by lower fertility or sterility of the apical and basal spikelets. In this study, the spikelet number per spike (SNPS), thousand kernel weight (TKW), KNPS, total grain numbers of the top three apical spikelets (GNAS), and total grain numbers of the bottom three basal spikelets (GNBS) of 212 wheat lines were recorded from five different environmental conditions. These 212 accessions ...
Published on Nov 1, 2018in Field Crops Research 3.87
Allan Peake6
Estimated H-index: 6
(CSIRO: Commonwealth Scientific and Industrial Research Organisation),
B.T. Das (CSIRO: Commonwealth Scientific and Industrial Research Organisation)+ 2 AuthorsN. Poole
Abstract Short duration spring wheat cultivars are currently preferred for irrigated wheat production in subtropical Australia due to their high levels of lodging resistance. A study was conducted to determine whether recently developed lodging-resistant long duration cultivars could achieve increased grain yield compared to short duration cultivars in irrigated sub-tropical environments. A key aspect of the study methodology required the use of different sowing dates for each maturity group to ...
Published on Sep 1, 2018in European Journal of Agronomy 3.38
Helga Ochagavía3
Estimated H-index: 3
(University of Lleida),
Paula Prieto3
Estimated H-index: 3
(University of Lleida)
+ 2 AuthorsGustavo A. Slafer58
Estimated H-index: 58
(University of Lleida)
Abstract Earliness per se ( Eps ) genes are critical for fine-tuning flowering time and likely to modify other developmental traits as well. Effects of Eps alleles on components comprising flowering time of hexaploid wheat have not been studied. In this work, we evaluated under field conditions the effects of Eps alleles on flowering time and on a number of developmental traits using four groups of near isogenic lines (NILs) with contrasting Eps alleles (late vs early alleles). The NIL groups we...
Published on Jul 1, 2018in Euphytica 1.53
M. P. Alonso1
Estimated H-index: 1
,
N. E. Mirabella2
Estimated H-index: 2
+ 2 AuthorsAna C. Pontaroli13
Estimated H-index: 13
Spike fertility index (SF) has been proposed as a promising trait to be used as a selection criterion in wheat breeding programs aimed at increasing grain yield, but no actual evidence of its successful application has been reported. In this study, 146 recombinant inbred lines derived from a cross between ‘Baguette 10’ and ‘Klein Chaja’, Argentinean spring bread wheat cultivars with contrasting SF, were evaluated during three crop seasons (2013, 2014 and 2015) at Balcarce, Argentina. Grain yield...