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wheat breeding and genetics

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https://www.readbyqxmd.com/read/28635630/development-of-a-high-density-snp-based-linkage-map-and-detection-of-qtl-for-%C3%AE-glucans-protein-content-grain-yield-per-spike-and-heading-time-in-durum-wheat
#1
Ilaria Marcotuli, Agata Gadaleta, Giacomo Mangini, Antonio Massimo Signorile, Silvana Addolorata Zacheo, Antonio Blanco, Rosanna Simeone, Pasqualina Colasuonno
High-density genetic linkage maps of crop species are particularly useful in detecting qualitative and quantitative trait loci for important agronomic traits and in improving the power of classical approaches to identify candidate genes. The aim of this study was to develop a high-density genetic linkage map in a durum wheat recombinant inbred lines population (RIL) derived from two elite wheat cultivars and to identify, characterize and correlate Quantitative Trait Loci (QTL) for β-glucan, protein content, grain yield per spike and heading time...
June 21, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28635270/understanding-the-effects-of-genotype-growing-year-and-breeding-on-tunisian-durum-wheat-allergenicity-part-2-the-celiac-disease-case
#2
Fatma Boukid, Barbara Prandi, Stefano Sforza, Rhouma Sayar, Yong Weon Seo, Mondher Mejri, Ines Yacoubi
The aim of this study was to compare immunogenic and toxic gluten peptides related to celiac disease (CD). 100 accessions of genotypes selected during the 20th century in Tunisia were in vitro digested, then analyzed by UPLC/ESI-MS technique using an isotopically labeled internal standard. The first MANOVA confirmed a high variability in the content of immunogenic and toxic peptides reflecting high genetic diversity in the germplasm released during the last century in Tunisia, consistently with PCA and clustering analysis results...
June 21, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28626463/cereal-crop-proteomics-systemic-analysis-of-crop-drought-stress-responses-towards-marker-assisted-selection-breeding
#3
REVIEW
Arindam Ghatak, Palak Chaturvedi, Wolfram Weckwerth
Sustainable crop production is the major challenge in the current global climate change scenario. Drought stress is one of the most critical abiotic factors which negatively impact crop productivity. In recent years, knowledge about molecular regulation has been generated to understand drought stress responses. For example, information obtained by transcriptome analysis has enhanced our knowledge and facilitated the identification of candidate genes which can be utilized for plant breeding. On the other hand, it becomes more and more evident that the translational and post-translational machinery plays a major role in stress adaptation, especially for immediate molecular processes during stress adaptation...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28624908/development-and-validation-of-kasp-markers-for-the-greenbug-resistance-gene-gb7-and-the-hessian-fly-resistance-gene-h32-in-wheat
#4
Chor-Tee Tan, Hangjin Yu, Yan Yang, Xiangyang Xu, Mingshun Chen, Jackie C Rudd, Qingwu Xue, Amir M H Ibrahim, Lisa Garza, Shichen Wang, Mark E Sorrells, Shuyu Liu
Greenbug and Hessian fly are important pests that decrease wheat production worldwide. We developed and validated breeder-friendly KASP markers for marker-assisted breeding to increase selection efficiency. Greenbug (Schizaphis graminum Rondani) and Hessian fly [Mayetiola destructor (Say)] are two major destructive insect pests of wheat (Triticum aestivum L.) throughout wheat production regions in the USA and worldwide. Greenbug and Hessian fly infestation can significantly reduce grain yield and quality. Breeding for resistance to these two pests using marker-assisted selection (MAS) is the most economical strategy to minimize losses...
June 17, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/28619368/preliminary-evidence-for-associations-between-molecular-markers-and-quantitative-traits-in-a-set-of-bread-wheat-triticum-aestivum-l-cultivars-and-breeding-lines
#5
Babak Abdollahi Mandoulakani, Shilan Nasri, Sahar Dashchi, Sorour Arzhang, Iraj Bernousi, Hossein Abbasi Holasou
The identification of polymorphic markers associated with various quantitative traits allows us to test their performance for the exploitation of the extensive quantitative variation maintained in gene banks. In the current study, a set of 97 wheat germplasm accessions including 48 cultivars and 49 breeding lines were evaluated for 18 agronomic traits. The accessions were also genotyped with 23 ISSR, nine IRAP and 20 REMAP markers, generating a total of 658 clear and scorable bands, 86% of which were polymorphic...
June 12, 2017: Comptes Rendus Biologies
https://www.readbyqxmd.com/read/28604800/characterising-variation-in-wheat-traits-under-hostile-soil-conditions-in-india
#6
Jaswant S Khokhar, Sindhu Sareen, Bhudeva S Tyagi, Gyanendra Singh, Apurba K Chowdhury, Tapamay Dhar, Vinod Singh, Ian P King, Scott D Young, Martin R Broadley
Intensive crop breeding has increased wheat yields and production in India. Wheat improvement in India typically involves selecting yield and component traits under non-hostile soil conditions at regional scales. The aim of this study is to quantify G*E interactions on yield and component traits to further explore site-specific trait selection for hostile soils. Field experiments were conducted at six sites (pH range 4.5-9.5) in 2013-14 and 2014-15, in three agro-climatic regions of India. At each site, yield and component traits were measured on 36 genotypes, representing elite varieties from a wide genetic background developed for different regions...
2017: PloS One
https://www.readbyqxmd.com/read/28588384/snp-based-association-analysis-for-seedling-traits-in-durum-wheat-triticum-turgidum-l-durum-desf
#7
Salih A I Sabiel, Sisi Huang, Xin Hu, Xifeng Ren, Chunjie Fu, Junhua Peng, Dongfa Sun
In the present study, 150 accessions of worldwide originated durum wheat germplasm (Triticum turgidum spp. durum) were observed for major seedling traits and their growth. The accessions were evaluated for major seedling traits under controlled conditions of hydroponics at the 13(th), 20(th), 27(th) and 34(th) day-after germination. Biomass traits were measured at the 34(th) day-after germination. Correlation analysis was conducted among the seedling traits and three field traits at maturity, plant height, grain weight and 1000-grain weight observed in four consecutive years...
March 2017: Breeding Science
https://www.readbyqxmd.com/read/28578401/rnaseq-analysis-reveals-pathways-and-candidate-genes-associated-with-salinity-tolerance-in-a-spaceflight-induced-wheat-mutant
#8
Hongchun Xiong, Huijun Guo, Yongdun Xie, Linshu Zhao, Jiayu Gu, Shirong Zhao, Junhui Li, Luxiang Liu
Salinity stress has become an increasing threat to food security worldwide and elucidation of the mechanism for salinity tolerance is of great significance. Induced mutation, especially spaceflight mutagenesis, is one important method for crop breeding. In this study, we show that a spaceflight-induced wheat mutant, named salinity tolerance 1 (st1), is a salinity-tolerant line. We report the characteristics of transcriptomic sequence variation induced by spaceflight, and show that mutations in genes associated with sodium ion transport may directly contribute to salinity tolerance in st1...
June 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28559904/genetic-architecture-of-anther-extrusion-in-spring-and-winter-wheat
#9
Quddoos H Muqaddasi, Jonathan Brassac, Andreas Börner, Klaus Pillen, Marion S Röder
Hybrid wheat breeding is gaining prominence worldwide because it ensures higher and more static yield than conventionally bred varieties. The cleistogamous floral architecture of wheat (Triticum aestivum L.) impedes anthers inside the floret, making it largely an inbreeder. For hybrid seed production, high anther extrusion is needed to promote cross pollination and to ensure a high level of pollen availability for the seed plant. This study, therefore, aimed at the genetic dissection of anther extrusion (AE) in panels of spring (SP), and winter wheat (WP) accessions by genome wide association studies (GWAS)...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28550605/high-throughput-snp-genotyping-of-modern-and-wild-emmer-wheat-for-yield-and-root-morphology-using-a-combined-association-and-linkage-analysis
#10
Stuart J Lucas, Ayten Salantur, Selami Yazar, Hikmet Budak
Durum wheat (Triticum turgidum var. durum Desf.) is a major world crop that is grown primarily in areas of the world that experience periodic drought, and therefore, breeding climate-resilient durum wheat is a priority. High-throughput single nucleotide polymorphism (SNP) genotyping techniques have greatly increased the power of linkage and association mapping analyses for bread wheat, but as yet there is no durum wheat-specific platform available. In this study, we evaluate the new 384HT Wheat Breeders Array for its usefulness in tetraploid wheat breeding by genotyping a breeding population of F6 hybrids, derived from multiple crosses between T...
May 26, 2017: Functional & Integrative Genomics
https://www.readbyqxmd.com/read/28540573/optimization-of-multi-environment-trials-for-genomic-selection-based-on-crop-models
#11
R Rincent, E Kuhn, H Monod, F-X Oury, M Rousset, V Allard, J Le Gouis
We propose a statistical criterion to optimize multi-environment trials to predict genotype × environment interactions more efficiently, by combining crop growth models and genomic selection models. Genotype × environment interactions (GEI) are common in plant multi-environment trials (METs). In this context, models developed for genomic selection (GS) that refers to the use of genome-wide information for predicting breeding values of selection candidates need to be adapted. One promising way to increase prediction accuracy in various environments is to combine ecophysiological and genetic modelling thanks to crop growth models (CGM) incorporating genetic parameters...
May 24, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/28533438/high-resolution-mapping-of-crossover-events-in-the-hexaploid-wheat-genome-suggests-a-universal-recombination-mechanism
#12
Benoit Darrier, Hélène Rimbert, François Balfourier, Lise Pingault, Ambre-Aurore Josselin, Bertrand Servin, Julien Navarro, Frédéric Choulet, Etienne Paux, Pierre Sourdille
During meiosis, crossovers (COs) create new allele associations by reciprocal exchange of DNA. In bread wheat (Triticum aestivum L.), COs are almost limited to subtelomeric regions of chromosomes resulting in a substantial loss of breeding efficiency in the proximal regions though these latter carry ~60-70% of the genes. Identifying sequence and/or chromosome features impacting recombination occurrence is thus relevant to improve and drive recombination. Using the recent release of a reference sequence of chromosome 3B and of the draft assemblies of the 20 other wheat chromosomes, we performed a fine-scale mapping of COs and we revealed that 82% of COs located in the distal ends of chromosome 3B representing 19% of the chromosome length...
May 22, 2017: Genetics
https://www.readbyqxmd.com/read/28526913/mapping-qtls-controlling-kernel-dimensions-in-a-wheat-inter-varietal-ril-mapping-population
#13
Ruiru Cheng, Zhongxin Kong, Liwei Zhang, Quan Xie, Haiyan Jia, Dong Yu, Yulong Huang, Zhengqiang Ma
Seven kernel dimension QTLs were identified in wheat, and kernel thickness was found to be the most important dimension for grain weight improvement. Kernel morphology and weight of wheat (Triticum aestivum L.) affect both yield and quality; however, the genetic basis of these traits and their interactions has not been fully understood. In this study, to investigate the genetic factors affecting kernel morphology and the association of kernel morphology traits with kernel weight, kernel length (KL), width (KW) and thickness (KT) were evaluated, together with hundred-grain weight (HGW), in a recombinant inbred line population derived from Nanda2419 × Wangshuibai, with data from five trials (two different locations over 3 years)...
July 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/28500796/high-density-genotyping-of-the-a-e-watkins-collection-of-hexaploid-landraces-identifies-a-large-molecular-diversity-compared-to-elite-bread-wheat
#14
Mark O Winfield, Alexandra M Allen, Paul A Wilkinson, Amanda J Burridge, Gary L A Barker, Jane Coghill, Christy Waterfall, Luzie U Wingen, Simon Griffiths, Keith J Edwards
The importance of wheat as a food crop makes it a major target for agricultural improvements. As one of the most widely grown cereal grains, together with maize and rice, wheat is the leading provider of calories in the global diet, constituting 29% of global cereal production in 2015. In the last few decades, however, yields have plateaued, suggesting that the green revolution, at least for wheat, might have run its course and that new sources of genetic variation are urgently required. The overall aim of our work is to identify novel variation that may then be used to enable the breeding process...
May 13, 2017: Plant Biotechnology Journal
https://www.readbyqxmd.com/read/28497807/a-trim-insertion-in-the-promoter-of-ms2-causes-male-sterility-in-wheat
#15
Chuan Xia, Lichao Zhang, Cheng Zou, Yongqiang Gu, Jialei Duan, Guangyao Zhao, Jiajie Wu, Yue Liu, Xiaohua Fang, Lifeng Gao, Yuannian Jiao, Jiaqiang Sun, Yinghong Pan, Xu Liu, Jizeng Jia, Xiuying Kong
The male-sterile ms2 mutant has been known for 40 years and has become extremely important in the commercial production of wheat. However, the gene responsible for this phenotype has remained unknown. Here we report the map-based cloning of the Ms2 gene. The Ms2 locus is remarkable in several ways that have implications in basic biology. Beyond having no functional annotation, barely detectable transcription in fertile wild-type wheat plants, and accumulated destructive mutations in Ms2 orthologs, the Ms2 allele in the ms2 mutant has acquired a terminal-repeat retrotransposon in miniature (TRIM) element in its promoter...
May 12, 2017: Nature Communications
https://www.readbyqxmd.com/read/28491078/the-importance-of-being-on-time-regulatory-networks-controlling-photoperiodic-flowering-in-cereals
#16
REVIEW
Vittoria Brambilla, Jorge Gomez-Ariza, Martina Cerise, Fabio Fornara
Flowering is the result of the coordination between genetic information and environmental cues. Gene regulatory networks have evolved in plants in order to measure diurnal and seasonal variation of day length (or photoperiod), thus aligning the reproductive phase with the most favorable season of the year. The capacity of plants to discriminate distinct photoperiods classifies them into long and short day species, depending on the conditions that induce flowering. Plants of tropical origin and adapted to short day lengths include rice, maize, and sorghum, whereas wheat and barley were originally domesticated in the Fertile Crescent and are considered long day species...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28476859/william-friedman-geneticist-turned-cryptographer
#17
Irwin L Goldman
William Friedman (1891-1969), trained as a plant geneticist at Cornell University, was employed at Riverbank Laboratories by the eccentric millionaire George Fabyan to work on wheat breeding. Friedman, however, soon became intrigued by and started working on a pet project of Fabyan's involving the conjecture that Francis Bacon, a polymath known for the study of ciphers, was the real author of Shakespeare's plays. Thus, beginning in ∼1916, Friedman turned his attention to the so called "Baconian cipher," and developed decryption techniques that bore similarity to approaches for solving problems in population genetics...
May 2017: Genetics
https://www.readbyqxmd.com/read/28464069/phenotypic-and-haplotype-diversity-among-tetraploid-and-hexaploid-wheat-accessions-with-potentially-novel-insect-resistance-genes-for-wheat-stem-sawfly
#18
J P Cook, N K Blake, H Y Heo, J M Martin, D K Weaver, L E Talbert
Genetic diversity in breeding programs can be impaired by fixation of alleles derived from a limited number of founder lines. This is demonstrated with the use of a solid-stem trait derived from the Portuguese landrace 'S-615' over 70 yrs ago that is widely used to resist the wheat stem sawfly ( Norton, WSS) in North America. The objective of this study was to evaluate haplotype diversity underlying the quantitative trait locus (QTL) that controls the majority of the S-615 derived solid-stem genetic variation using single-nucleotide polymorphism (SNP) assays in a diverse set of 228 solid-stem tetraploid and hexaploid wheat accessions originating from areas of the world infested with various species of WSS...
March 2017: Plant Genome
https://www.readbyqxmd.com/read/28451771/epistatic-determinism-of-durum-wheat-resistance-to-the-wheat-spindle-streak-mosaic-virus
#19
Yan Holtz, Michel Bonnefoy, Véronique Viader, Morgane Ardisson, Nicolas O Rode, Gérard Poux, Pierre Roumet, Véronique Marie-Jeanne, Vincent Ranwez, Sylvain Santoni, David Gouache, Jacques L David
The resistance of durum wheat to the Wheat spindle streak mosaic virus (WSSMV) is controlled by two main QTLs on chromosomes 7A and 7B, with a huge epistatic effect. Wheat spindle streak mosaic virus (WSSMV) is a major disease of durum wheat in Europe and North America. Breeding WSSMV-resistant cultivars is currently the only way to control the virus since no treatment is available. This paper reports studies of the inheritance of WSSMV resistance using two related durum wheat populations obtained by crossing two elite cultivars with a WSSMV-resistant emmer cultivar...
July 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/28446328/combined-gc-and-uhplc-hr-ms-based-metabolomics-to-analyze-durable-anti-fungal-resistance-processes-in-cereals
#20
Rahel Bucher, Daniel Veyel, Lothar Willmitzer, Simon Krattinger, Beat Keller, Laurent Biglera
Introduction of durable resistance genes in crops is an important strategy to prevent yield loss caused by pathogens. The durable multi-pathogen resistance gene Lr34 originating from wheat is widely used in breeding, and is functionally transferable to barley and rice. The molecular resistance mechanism of Lr34, encoding for an adenosine triphosphate-binding cassette transporter, is not known yet. To understand the molecular function and the defense response of durable disease resistance in cereals, the metabolic response of Lr34 was investigated in, except for the Lr34 gene, genetically identical lines of barley, rice and wheat...
April 26, 2017: Chimia
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