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Strategic crossing of biomass and harvest index—source and sink—achieves genetic gains in wheat

Published on Nov 1, 2017in Euphytica 1.53
· DOI :10.1007/s10681-017-2040-z
Matthew P. Reynolds61
Estimated H-index: 61
(CIMMYT: International Maize and Wheat Improvement Center),
A.J.D. Pask3
Estimated H-index: 3
(CIMMYT: International Maize and Wheat Improvement Center)
+ 73 AuthorsA. K. Joshi31
Estimated H-index: 31
(CIMMYT: International Maize and Wheat Improvement Center)
Cite
Abstract
To accelerate genetic gains in breeding, physiological trait (PT) characterization of candidate parents can help make more strategic crosses, increasing the probability of accumulating favorable alleles compared to crossing relatively uncharacterized lines. In this study, crosses were designed to complement “source” with “sink” traits, where at least one parent was selected for favorable expression of biomass and/or radiation use efficiency—source—and the other for sink-related traits like harvest-index, kernel weight and grains per spike. Female parents were selected from among genetic resources—including landraces and products of wide-crossing (i.e. synthetic wheat)—that had been evaluated in Mexico at high yield potential or under heat stress, while elite lines were used as males. Progeny of crosses were advanced to the F4 generation within Mexico, and F4-derived F5 and F6 generations were yield tested to populate four international nurseries, targeted to high yield environments (2nd and 3rd WYCYT) for yield potential, and heat stressed environments (2nd and 4th SATYN) for climate resilience, respectively. Each nursery was grown as multi-location yield trials. Genetic gains were achieved in both temperate and hot environments, with most new PT-derived lines expressing superior yield and biomass compared to local checks at almost all international sites. Furthermore, the tendency across all four nurseries indicated either the superiority of the best new PT lines compared with the CIMMYT elite checks, or the superiority of all new PT lines as a group compared with all checks, and in some cases, both. Results support—in a realistic breeding context—the hypothesis that yield and radiation use efficiency can be increased by improving source:sink balance, and validate the feasibility of incorporating exotic germplasm into mainstream breeding efforts to accelerate genetic gains for yield potential and climate resilience.
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  • Citations (8)
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References26
Newest
Published on Jul 28, 2017in Science 41.04
Matthew P. Reynolds61
Estimated H-index: 61
(CIMMYT: International Maize and Wheat Improvement Center),
H. J. Braun24
Estimated H-index: 24
(CIMMYT: International Maize and Wheat Improvement Center)
+ 16 AuthorsH. Lucas1
Estimated H-index: 1
In recent decades, the scientific, development, and farm communities have contributed to substantial gains in crop productivity, including in many less developed countries (LDCs) ( 1 ), yet current yield trends and agri-food systems are inadequate to match projected demand ( 2 ). Addressing transnational crop challenges will require refinement of research infrastructure and better leverage of global expertise and technologies. Drawing on lessons learned from international collaboration in wheat,...
Published on Feb 1, 2017in G3: Genes, Genomes, Genetics 2.63
Sivakumar Sukumaran10
Estimated H-index: 10
(CIMMYT: International Maize and Wheat Improvement Center),
José Crossa60
Estimated H-index: 60
(CIMMYT: International Maize and Wheat Improvement Center)
+ 2 AuthorsMatthew P. Reynolds61
Estimated H-index: 61
(CIMMYT: International Maize and Wheat Improvement Center)
Developing genomic selection (GS) models is an important step in applying GS to accelerate the rate of genetic gain in grain yield in plant breeding. In this study, seven genomic prediction models under two cross-validation (CV) scenarios were tested on 287 advanced elite spring wheat lines phenotyped for grain yield (GY), thousand-grain weight (GW), grain number (GN), and thermal time for flowering (TTF) in 18 international environments (year-location combinations) in major wheat-producing coun...
Published on Jan 1, 2017in Crop Science 1.64
Leonardo A. Crespo-Herrera7
Estimated H-index: 7
(CIMMYT: International Maize and Wheat Improvement Center),
José Crossa60
Estimated H-index: 60
(CIMMYT: International Maize and Wheat Improvement Center)
+ 6 AuthorsRavi P. Singh61
Estimated H-index: 61
(CIMMYT: International Maize and Wheat Improvement Center)
Published on Sep 1, 2016in G3: Genes, Genomes, Genetics 2.63
Jessica Rutkoski18
Estimated H-index: 18
(CIMMYT: International Maize and Wheat Improvement Center),
Jesse Poland34
Estimated H-index: 34
(KSU: Kansas State University)
+ 5 AuthorsRavi P. Singh61
Estimated H-index: 61
(CIMMYT: International Maize and Wheat Improvement Center)
Genomic selection can be applied prior to phenotyping, enabling shorter breeding cycles and greater rates of genetic gain relative to phenotypic selection. Traits measured using high-throughput phenotyping based on proximal or remote sensing could be useful for improving pedigree and genomic prediction model accuracies for traits not yet possible to phenotype directly. We tested if using aerial measurements of canopy temperature, and green and red normalized difference vegetation index as second...
Published on Aug 3, 2016in Frontiers in Plant Science 4.11
Maria Tattaris4
Estimated H-index: 4
(CIMMYT: International Maize and Wheat Improvement Center),
Matthew P. Reynolds61
Estimated H-index: 61
(CIMMYT: International Maize and Wheat Improvement Center),
Scott C. Chapman48
Estimated H-index: 48
(CSIRO: Commonwealth Scientific and Industrial Research Organisation)
Remote sensing (RS) of plant canopies permits non-intrusive, high-throughput monitoring of plant physiological characteristics. This study compared three RS approaches using a low flying UAV (unmanned aerial vehicle), with that of proximal sensing, and satellite-based imagery. Two physiological traits were considered, canopy temperature (CT) and a vegetation index (NDVI), to determine the most viable approaches for large scale crop genetic improvement. The UAV-based platform achieves plot-level ...
Published on Jul 19, 2016in Plant Physiology 6.30
Emilie J. Millet3
Estimated H-index: 3
(INRA: Institut national de la recherche agronomique),
Claude Welcker12
Estimated H-index: 12
+ 15 AuthorsNicolas Ranc13
Estimated H-index: 13
(Syngenta)
Assessing the genetic variability of plant performance under heat and drought scenarios can contribute to reduce the negative effects of climate change. We propose here an approach that consisted of (1) clustering time courses of environmental variables simulated by a crop model in current (35 years × 55 sites) and future conditions, into six scenarios of temperature and water deficit as experienced by maize plants; (2) performing 29 field experiments in contrasting conditions across Europe with...
Published on Jul 15, 2015in PLOS ONE 2.78
Deepmala Sehgal14
Estimated H-index: 14
(CIMMYT: International Maize and Wheat Improvement Center),
Prashant Vikram18
Estimated H-index: 18
(CIMMYT: International Maize and Wheat Improvement Center)
+ 8 AuthorsPeter Wenzl28
Estimated H-index: 28
Identifying and mobilizing useful genetic variation from germplasm banks to breeding programs is an important strategy for sustaining crop genetic improvement. The molecular diversity of 1,423 spring bread wheat accessions representing major global production environments was investigated using high quality genotyping-by-sequencing (GBS) loci, and gene-based markers for various adaptive and quality traits. Mean diversity index (DI) estimates revealed synthetic hexaploids to be genetically more d...
Published on Apr 1, 2015in Current Opinion in Biotechnology 8.08
Peter Langridge66
Estimated H-index: 66
(Australian Centre for Plant Functional Genomics),
Matthew P. Reynolds61
Estimated H-index: 61
(CIMMYT: International Maize and Wheat Improvement Center)
Water deficit or drought stress is a major limitation to crop production globally. Plant breeders have used a wide range of technologies to successfully breed varieties that perform well under the growth conditions for their target environments but they are always seeking new opportunities to enhance rates of genetic gain. Under drought, yield is determined by the integration of variable levels of water deficit across the developmental life of the crop. Genomics technologies were seen as a path ...
Published on Mar 16, 2015in PLOS ONE 2.78
Simon Griffiths27
Estimated H-index: 27
(Norwich Research Park),
Luzie U. Wingen18
Estimated H-index: 18
(Norwich Research Park)
+ 9 AuthorsJames Simmonds18
Estimated H-index: 18
(Norwich Research Park)
Grain weight (GW) and number per unit area of land (GN) are the primary components of grain yield in wheat. In segregating populations both yield components often show a negative correlation among themselves. Here we use a recombinant doubled haploid population of 105 individuals developed from the CIMMYT varieties Weebill and Bacanora to understand the relative contribution of these components to grain yield and their interaction with each other. Weebill was chosen for its high GW and Bacanora ...
Published on Mar 1, 2015in Trends in Plant Science 14.01
Michel Edmond Ghanem5
Estimated H-index: 5
(ICARDA: International Center for Agricultural Research in the Dry Areas),
Hélène Marrou5
Estimated H-index: 5
(SupAgro),
Thomas R. Sinclair60
Estimated H-index: 60
(NCSU: North Carolina State University)
Future progress in crop breeding requires a new emphasis in plant physiological phenotyping for specific, welldefined traits. Success in physiological phenotyping to identify parents for use in breeding efforts for improved cultivars has been achieved by employing a multi-tier screening approach with different levels of sophistication and trait resolution. Subsequently, cultivar development required an integrated mix of classical breeding approaches and one or more tiers of phenotyping to identi...
Cited By8
Newest
Zamalotshwa Thungo (UKZN: University of KwaZulu-Natal), Hussein Shimelis12
Estimated H-index: 12
(UKZN: University of KwaZulu-Natal)
+ -3 AuthorsJacob Mashilo4
Estimated H-index: 4
(UKZN: University of KwaZulu-Natal)
ABSTRACTThe selection of relatively high and stable yielding genotypes is key in wheat breeding programs to improve yield performance under heat and drought-stressed environments. This study determ...
Sonto Silindile Mkhabela (UKZN: University of KwaZulu-Natal), Hussein Shimelis12
Estimated H-index: 12
(UKZN: University of KwaZulu-Natal)
+ 1 AuthorsJacob Mashilo4
Estimated H-index: 4
(UKZN: University of KwaZulu-Natal)
ABSTRACTGenetic improvement of wheat for drought tolerance can be achieved by developing suitable ideotypes with enhanced yield-response associated with agronomic traits and biochemical markers. Th...
Published on Jul 5, 2019in bioRxiv
Denis Fabre10
Estimated H-index: 10
,
Michaël Dingkuhn42
Estimated H-index: 42
+ 4 AuthorsDelphine Luquet18
Estimated H-index: 18
This study aimed to understand the response of photosynthesis and growth to e-CO2 conditions (800 vs. 400 μmol mol-1) of rice genotypes differing in source-sink relationships. A proxy trait called local C source-sink ratio was defined as the ratio of flag leaf area over the number of spikelets on the corresponding panicle, and five genotypes differing in this ratio were grown in a controlled greenhouse. Differential CO2 resources were applied either during the two weeks following heading (EXP1) ...
Published on May 3, 2019in Plant Biology 2.39
S. Tausz‐Posch (University of Birmingham), M. Tausz (Central Queensland University), M. Bourgault (MSU: Montana State University)
Published on May 1, 2019in Plant Science 3.79
Reyazul Rouf Mir2
Estimated H-index: 2
(Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir),
Mathew Reynolds1
Estimated H-index: 1
(CIMMYT: International Maize and Wheat Improvement Center)
+ 2 AuthorsMohd Ashraf Bhat1
Estimated H-index: 1
(Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir)
Abstract Tremendous progress has been made with continually expanding genomics technologies to unravel and understand crop genomes. However, the impact of genomics data on crop improvement is still far from satisfactory, in large part due to a lack of effective phenotypic data; our capacity to collect useful high quality phenotypic data lags behind the current capacity to generate high-throughput genomics data. Thus, the research bottleneck in plant sciences is shifting from genotyping to phenot...
Published on May 1, 2019in Plant Science 3.79
M. Fernanda Dreccer13
Estimated H-index: 13
(CSIRO: Commonwealth Scientific and Industrial Research Organisation),
Gemma Molero14
Estimated H-index: 14
(CIMMYT: International Maize and Wheat Improvement Center)
+ 2 AuthorsZoe A. Wilson27
Estimated H-index: 27
(University of Nottingham)
Reproductive organs are the main reason we grow and harvest most plant species as crops, yet they receive less attention from phenotyping due to their complexity and inaccessibility for analysis. This review highlights recent progress towards the quantitative high-throughput phenotyping of reproductive development, focusing on three impactful areas that are pivotal for plant breeding and crop production. First, we look at phenotyping phenology, summarizing the indirect and direct approaches that...
Published on Jan 1, 2019in Crop Science 1.64
Senthold Asseng42
Estimated H-index: 42
(UF: University of Florida),
Pierre Martre33
Estimated H-index: 33
(SupAgro)
+ 8 AuthorsJérôme Salse34
Estimated H-index: 34
(INRA: Institut national de la recherche agronomique)
Published in bioRxiv
Gemma Molero14
Estimated H-index: 14
(CIMMYT: International Maize and Wheat Improvement Center),
Ryan Joynson3
Estimated H-index: 3
+ -3 AuthorsMatthew P. Reynolds (CIMMYT: International Maize and Wheat Improvement Center)
One of the major challenges for plant scientists is increasing wheat (Triticum aestivum) yield potential (YP). A significant bottleneck for increasing YP is achieving increased biomass through optimization of Radiation Use Efficiency (RUE) along the crop cycle. Exotic material such as landraces and synthetic wheat has been incorporated into breeding programs in an attempt to alleviate this, however their contribution to YP is still unclear. To understand the genetic basis of biomass accumulation...