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wheat breeding and genetics

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https://www.readbyqxmd.com/read/28821592/global-analysis-of-gene-expression-in-response-to-whole-chromosome-aneuploidy-in-hexaploid-wheat
#1
Ai Zhang, Ning Li, Lei Gong, Xiaowan Gou, Bin Wang, Xin Deng, Changping Li, Qianli Dong, Huakun Zhang, Bao Liu
Aneuploidy, a condition of unbalanced chromosome content, represents a large-effect mutation that bears significant relevancy to human health and microbe adaptation. As such, extensive studies of aneuploidy have been conducted in unicellular model organisms and cancer cells. Aneuploidy also frequently is associated with plant polyploidization, but its impact on gene expression and relevance to polyploid genome evolution/functional innovation remain largely unknown. Here, we used a panel of diverse types of whole-chromosome aneuploidy of hexaploid wheat, all under the common genetic background of cv...
August 18, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28817082/omega-3-long-chain-fatty-acids-in-the-heart-kidney-liver-and-plasma-metabolite-profiles-of-australian-prime-lambs-supplemented-with-pelleted-canola-and-flaxseed-oils
#2
Don V Nguyen, Van H Le, Quang V Nguyen, Bunmi S Malau-Aduli, Peter D Nichols, Aduli E O Malau-Aduli
The objective of the study was to ascertain whether human health beneficial omega-3 long-chain (≥C20) polyunsaturated fatty acid (n-3 LC-PUFA) content in heart, kidney and liver can be enhanced by supplementing prime lambs with graded levels of canola and flaxseed oil. Health status of the lambs, as a consequence of the supplementation, was also investigated by examining their plasma metabolites. Sixty purebred and first-cross lambs were allocated to one of five treatments of lucerne hay basal diet supplemented with isocaloric and isonitrogenous wheat-based pellets without oil inclusion (Control) or graded levels of canola oil at 2...
August 17, 2017: Nutrients
https://www.readbyqxmd.com/read/28798752/qtl-analysis-and-nested-association-mapping-for-adult-plant-resistance-to-powdery-mildew-in-two-bread-wheat-populations
#3
Yan Ren, Weixiu Hou, Caixia Lan, Bhoja R Basnet, Ravi P Singh, Wei Zhu, Xiyong Cheng, Dangqun Cui, Feng Chen
CIMMYT wheat (Triticum aestivum L.) lines Francolin#1 and Quaiu#3 displayed effective and stable adult plant resistance (APR) to Chinese Blumeria graminis f. sp. tritici isolates in the field. To elucidate their genetic basis of resistance, two recombinant inbred line (RIL) populations of their crosses with Avocet, the susceptible parent, were phenotyped in Zhengzhou and Shangqiu in the 2014-2015 and 2015-2016 cropping seasons. These populations were also genotyped with SSR (simple sequence repeat markers) and DArT (diversity arrays technology) markers...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28796162/the-variation-analysis-of-dna-methylation-in-wheat-carrying-gametocidal-chromosome-3c-from-aegilops-triuncialis
#4
Dan Wang, Jieyu Zhao, Yan Bai, You Ao, Changhong Guo
Gametocidal (Gc) chromosomes can ensure their preferential transmission by killing the gametes without themselves through causing chromosome breakage and therefore have been exploited as an effective tool for genetic breeding. However, to date very little is known about the molecular mechanism of Gc action. In this study, we used methylation-sensitive amplified polymorphism (MSAP) technique to assess the extent and pattern of cytosine methylation alterations at the whole genome level between two lines of wheat Gc addition line and their common wheat parent...
August 10, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28783218/evolutionary-agroecology-individual-fitness-and-population-yield-in-wheat-triticum-aestivum
#5
Jacob Weiner, Yan-Lei Du, Cong Zhang, Xiao-Liang Qin, Feng-Min Li
Although the importance of group selection in nature is highly controversial, several researchers have argued that plant breeding for agriculture should be based on group selection, because the goal in agriculture is to optimize population production, not individual fitness. A core hypothesis behind this claim is that crop genotypes with the highest individual fitness in a mixture of genotypes will not produce the highest population yield, because fitness is often increased by "selfish" behaviors, which reduce population performance...
August 7, 2017: Ecology
https://www.readbyqxmd.com/read/28769970/genetic-diversity-within-a-global-panel-of-durum-wheat-triticum-durum-landraces-and-modern-germplasm-reveals-the-history-of-alleles-exchange
#6
Hafssa Kabbaj, Amadou T Sall, Ayed Al-Abdallat, Mulatu Geleta, Ahmed Amri, Abdelkarim Filali-Maltouf, Bouchra Belkadi, Rodomiro Ortiz, Filippo M Bassi
Durum wheat is the 10th most important crop in the world, and its use traces back to the origin of agriculture. Unfortunately, in the last century only part of the genetic diversity available for this species has been captured in modern varieties through breeding. Here, the population structure and genetic diversity shared among elites and landraces collected from 32 countries was investigated. A total of 370 entries were genotyped with Axiom 35K array to identify 8,173 segregating single nucleotide polymorphisms (SNPs)...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28769945/genome-wide-association-study-to-identify-the-genetic-base-of-smallholder-farmer-preferences-of-durum-wheat-traits
#7
Yosef G Kidane, Chiara Mancini, Dejene K Mengistu, Elisabetta Frascaroli, Carlo Fadda, Mario Enrico Pè, Matteo Dell'Acqua
Smallholder agriculture involves millions of farmers worldwide. A methodical utilization of their traditional knowledge in modern breeding efforts may help the production of locally adapted varieties better addressing their needs. In this study, a combination of participatory approaches, genomics, and quantitative genetics is used to trace the genetic basis of smallholder farmer preferences of durum wheat traits. Two smallholder communities evaluated 400 Ethiopian wheat varieties, mostly landraces, for traits of local interest in two locations in the Ethiopian highlands...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28761779/identification-of-ecogeographical-gaps-in-the-spanish-aegilops-collections-with-potential-tolerance-to-drought-and-salinity
#8
Rosa María Garcia, Mauricio Parra-Quijano, Jose María Iriondo
Drought, one of the most important abiotic stress factors limiting biomass, significantly reduces crop productivity. Salinization also affects the productivity of both irrigated and rain-fed wheat crops. Species of genus Aegilops can be considered crop wild relatives (CWR) of wheat and have been widely used as gene sources in wheat breeding, especially in providing resistance to pests and diseases. Five species (Ae. biuncialis, Ae. geniculata, Ae. neglecta, Ae. triuncialis and Ae. ventricosa) are included in the Spanish National Inventory of CWRs...
2017: PeerJ
https://www.readbyqxmd.com/read/28760136/development-of-a-high-density-linkage-map-and-mapping-of-the-three-pistil-gene-pis1-in-wheat-using-gbs-markers
#9
Zaijun Yang, Zhenyong Chen, Zhengsong Peng, Yan Yu, Mingli Liao, Shuhong Wei
BACKGROUND: The wheat mutant line three-pistil (TP) exhibits three pistils per floret. As TP normally has two or three seeds in each of the florets on the same spike, there is the possibility of increasing the number of grains per spike. Therefore, TP is a highly valuable mutant for breeding and for the study of floral development in wheat. To map the three-pistil gene (Pis1), genotyping-by-sequencing single-nucleotide polymorphism (GBS-SNP) data from an F2 mapping population (CM28 × CM28TP) was used to construct a genetic map that is of significant value...
July 31, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28724066/strategies-for-selecting-crosses-using-genomic-prediction-in-two-wheat-breeding-programs
#10
Bettina Lado, Sarah Battenfield, Carlos Guzmán, Martín Quincke, Ravi P Singh, Susanne Dreisigacker, R Javier Peña, Allan Fritz, Paula Silva, Jesse Poland, Lucía Gutiérrez
The single most important decision in plant breeding programs is the selection of appropriate crosses. The ideal cross would provide superior predicted progeny performance and enough diversity to maintain genetic gain. The aim of this study was to compare the best crosses predicted using combinations of mid-parent value and variance prediction accounting for linkage disequilibrium (V) or assuming linkage equilibrium (V). After predicting the mean and the variance of each cross, we selected crosses based on mid-parent value, the top 10% of the progeny, and weighted mean and variance within progenies for grain yield, grain protein content, mixing time, and loaf volume in two applied wheat ( L...
July 2017: Plant Genome
https://www.readbyqxmd.com/read/28724061/multi-locus-mixed-model-analysis-of-stem-rust-resistance-in-winter-wheat
#11
Paul D Mihalyov, Virginia A Nichols, Peter Bulli, Matthew N Rouse, Michael O Pumphrey
Genome-wide association mapping is a powerful tool for dissecting the relationship between phenotypes and genetic variants in diverse populations. With the improved cost efficiency of high-throughput genotyping platforms, association mapping is a desirable method of mining populations for favorable alleles that hold value for crop improvement. Stem rust, caused by the fungus f. sp. is a devastating disease that threatens wheat ( L.) production worldwide. Here, we explored the genetic basis of stem rust resistance in a global collection of 1411 hexaploid winter wheat accessions genotyped with 5390 single nucleotide polymorphism markers...
July 2017: Plant Genome
https://www.readbyqxmd.com/read/28711956/mapping-stripe-rust-resistance-gene-yrzh22-in-chinese-wheat-cultivar-zhoumai-22-by-bulked-segregant-rna-seq-bsr-seq-and-comparative-genomics-analyses
#12
Yong Wang, Jingzhong Xie, Huaizhi Zhang, Bingmin Guo, Shunzong Ning, Yongxing Chen, Ping Lu, Qiuhong Wu, Miaomiao Li, Deyun Zhang, Guanghao Guo, Yan Zhang, Dengcai Liu, Shaokui Zou, Jianwei Tang, Hong Zhao, Xicheng Wang, Jun Li, Wuyun Yang, Tingjie Cao, Guihong Yin, Zhiyong Liu
A stripe rust resistance gene YrZH22 was mapped by combined BSR-Seq and comparative genomics analyses to a 5.92 centimorgan (cM) genetic interval spanning a 4 Mb physical genomic region on wheat chromosome 4BL1. Stripe rust, caused by Puccinia striiformis f. sp. tritici (PST), is one of the most destructive diseases of wheat and severely threatens wheat production worldwide. The widely grown Chinese wheat cultivar Zhoumai 22 is highly resistant to the current prevailing PST race CYR34 (V26). Genetic analysis of F5:6 and F6:7 recombinant inbred line (RIL) populations indicated that adult-plant stripe rust resistance in Zhoumai 22 is controlled by a single gene, temporarily designated YrZH22...
July 15, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/28704468/thmyc4e-candidate-blue-aleurone-1-gene-controlling-the-associated-trait-in-triticum-aestivum
#13
Na Li, Shiming Li, Kunpu Zhang, Wenjie Chen, Bo Zhang, Daowen Wang, Dengcai Liu, Baolong Liu, Huaigang Zhang
Blue aleurone is a useful and interesting trait in common wheat that was derived from related species. Here, transcriptomes of blue and white aleurone were compared for isolating Blue aleurone 1 (Ba1) transferred from Thinopyrum ponticum. In the genes involved in anthocyanin biosynthesis, only a basic helix-loop-helix (bHLH) transcription factor, ThMYC4E, had a higher transcript level in blue aleurone phenotype, and was homologous to the genes on chromosome 4 of Triticum aestivum. ThMYC4E carried the characteristic domains (bHLH-MYC_N, HLH and ACT-like) of a bHLH transcription factor, and clustered with genes regulating anthocyanin biosynthesis upon phylogenetic analysis...
2017: PloS One
https://www.readbyqxmd.com/read/28686676/exotic-qtl-improve-grain-quality-in-the-tri-parental-wheat-population-sw84
#14
Ioanna-Pavlina Nedelkou, Andreas Maurer, Anne Schubert, Jens Léon, Klaus Pillen
DEVELOPING THE TRI-PARENTAL EXOTIC WHEAT POPULATION SW84: Genetic diversity of cultivated wheat was markedly reduced, first, during domestication and, second, since the onset of modern elite breeding. There is an increasing demand for utilizing genetic resources to increase genetic diversity and, simultaneously, to improve agronomic performance of cultivated wheat. To locate favorable effects of exotic wheat alleles, we developed the tri-parental wheat population SW84. The population was derived from crossing the hexaploid spring wheat cultivars Triso and Devon with one synthetic exotic donor accession, Syn084L, followed by two rounds of backcrossing and three rounds of selfing...
2017: PloS One
https://www.readbyqxmd.com/read/28655739/genome-wide-associations-for-water-soluble-carbohydrate-concentration-and-relative-maturity-in-wheat-using-snp-and-dart-marker-arrays
#15
Ben Ovenden, Andrew Milgate, Len J Wade, Greg J Rebetzke, James B Holland
Improving water-use efficiency by incorporating drought avoidance traits into new wheat varieties is an important objective for wheat breeding in water-limited environments. This study uses genome wide association studies (GWAS) to identify candidate loci for water-soluble carbohydrate accumulation-an important drought-avoidance characteristic in wheat. Phenotypes from a multi-environment trial with experiments differing in water availability and separate single nucleotide polymorphism (SNP) and diversity arrays technology (DArT) marker sets were used to perform the analyses...
August 7, 2017: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/28644028/understanding-the-effects-of-genotype-growing-year-and-breeding-on-tunisian-durum-wheat-allergenicity-1-the-baker-s-asthma-case
#16
Fatma Boukid, Barbara Prandi, Stefano Sforza, Rhouma Sayar, Yong Weon Seo, Mondher Mejri, Ines Yacoubi
Baker's asthma is a serious airway disease triggered by wheat protein CM3 α-amylase/trypsin inhibitor. The purpose of the present study was to investigate the impact of genotype and crop year on allergen CM3 α-amylase/trypsin inhibitor associated with baker's asthma. A historical series of Tunisian durum wheat (100 accessions), derived from three crop years, was used to compare the amount of CM3 from landraces to advanced cultivars. CM3 protein quantification was assessed after an enzymatic cleavage of the soluble protein extracts on a UPLC/ESI-MS system, using a marker peptide for its quantification...
July 19, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28638972/isolation-of-two-new-retrotransposon-sequences-and-development-of-molecular-and-cytological-markers-for-dasypyrum-villosum-l
#17
Jie Zhang, Yun Jiang, Pu Xuan, Yuanlin Guo, Guangbing Deng, Maoqun Yu, Hai Long
Dasypyrum villosum is a valuable genetic resource for wheat improvement. With the aim to efficiently monitor the D. villosum chromatin introduced into common wheat, two novel retrotransposon sequences were isolated by RAPD, and were successfully converted to D. villosum-specific SCAR markers. In addition, we constructed a chromosomal karyotype of D. villosum. Our results revealed that different accessions of D. villosum showed slightly different signal patterns, indicating that distribution of repeats did not diverge significantly among D...
June 21, 2017: Genetica
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
#18
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-2-the-celiac-disease-case
#19
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 and 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 past century in Tunisia, consistently with PCA and clustering analysis results...
July 19, 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
#20
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
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