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TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik

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https://www.readbyqxmd.com/read/30242493/fine-mapping-of-a-dominant-gene-conferring-resistance-to-spot-blotch-caused-by-a-new-pathotype-of-bipolaris-sorokiniana-in-barley
#1
Rui Wang, Yueqiang Leng, Mingxia Zhao, Shaobin Zhong
We fine-mapped and physically anchored a dominant gene (Rbs7) conferring resistance to spot blotch caused by a new pathotype of Bipolaris sorokiniana in a genomic interval of 304 kb on barley chromosome 6H. Spot blotch, caused by Bipolaris sorokiniana, is an economically important disease on barley in the Upper Midwest region of the USA and Prairie Provinces of Canada. A new pathotype (pathotype 7, represented by isolate ND4008) of B. sorokiniana has been identified, which is highly virulent on barley cultivars with resistance to other pathotypes of the fungus...
September 21, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/30242492/novel-loci-fsd6-1-and-csgl3-regulate-ultra-high-fruit-spine-density-in-cucumber
#2
Kailiang Bo, Han Miao, Min Wang, Xiaoxiao Xie, Zichao Song, Qing Xie, Lixue Shi, Weiping Wang, Shuang Wei, Shengping Zhang, Xingfang Gu
Quantitative Trait Loci (QTL) analysis of multiple populations in multiple environments revealed that the fsd6.2 locus, which includes the candidate gene Csgl3, controls high fruit spine density in natural cucumbers. GWAS identified a novel locus fsd6.1, which regulates ultra-high fruit spine density in combination with Csgl3, and evolved during cucumber domestication. Fruit spine density, a domestication trait, largely influences the commercial value of cucumbers. However, the molecular basis of fruit spine density in cucumber remains unclear...
September 21, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/30238255/genetic-mapping-of-stb19-a-new-resistance-gene-to-zymoseptoria-tritici-in-wheat
#3
Nannan Yang, Megan C McDonald, Peter S Solomon, Andrew W Milgate
A new and dominant R gene Stb19 is identified from a soft wheat cultivar 'Lorikeet' and was mapped on the distal region of chromosome 1DS. Two tightly linked KASP markers were also discovered and validated for molecular-assisted breeding programs. A new R gene, designated as Stb19, provides resistance to Zymoseptoria tritici in wheat. This new dominant gene resides on the short arm of chromosome 1D, exhibiting complete resistance to three Z. tritici isolates, WAI332, WAI251, and WAI161, at the seedling stage...
September 20, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/30238254/fine-mapping-and-candidate-gene-identification-of-the-genic-male-sterile-gene-ms3-in-cabbage-51s
#4
Fengqing Han, Kaiwen Yuan, Congcong Kong, Xiaoli Zhang, Limei Yang, Mu Zhuang, Yangyong Zhang, Zhansheng Li, Yong Wang, Zhiyuan Fang, Honghao Lv
The ms3 gene responsible for a male-sterile phenotype in cabbage was mapped to a 187.4-kb genomic fragment. The gene BoTPD1, a homolog of Arabidopsis TPD1, was identified as a strong candidate gene. Cabbage 51S is a spontaneous male-sterile mutant. Phenotypic investigation revealed defects in anther cell differentiation, with failure to form the tapetum layer and complete abortion of microsporocytes before the tetrad stage. Genetic analysis indicated that this male sterility was controlled by a single recessive gene, ms3...
September 20, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/30232499/resource-allocation-optimization-with-multi-trait-genomic-prediction-for-bread-wheat-triticum-aestivum-l-baking-quality
#5
Bettina Lado, Daniel Vázquez, Martin Quincke, Paula Silva, Ignacio Aguilar, Lucia Gutiérrez
Multi-trait genomic prediction models are useful to allocate available resources in breeding programs by targeted phenotyping of correlated traits when predicting expensive and labor-intensive quality parameters. Multi-trait genomic prediction models can be used to predict labor-intensive or expensive correlated traits where phenotyping depth of correlated traits could be larger than phenotyping depth of targeted traits, reducing resources and improving prediction accuracy. This is particularly important in the context of allocating phenotyping resource in plant breeding programs...
September 19, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/30225644/low-molecular-weight-glutenin-subunit-gene-composition-at-glu-d3-loci-of-aegilops-tauschii-and-common-wheat-and-a-further-view-of-wheat-evolution
#6
Lisha Shen, Guangbin Luo, Yanhong Song, Shuyi Song, Yiwen Li, Wenlong Yang, Xin Li, Jiazhu Sun, Dongcheng Liu, Aimin Zhang
A comprehensive comparison of LMW-GS genes between Ae. tauschii and its progeny common wheat. Low molecular weight glutenin subunits (LMW-GSs) are determinant of wheat flour processing quality. However, the LMW-GS gene composition in Aegilops tauschii, the wheat D genome progenitor, has not been comprehensively elucidated and the impact of allohexaploidization on the Glu-D3 locus remains elusive. In this work, using the LMW-GS gene molecular marker system and the full-length gene-cloning method, LMW-GS genes at the Glu-D3 loci of 218 Ae...
September 17, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/30225643/the-western-mediterranean-region-provided-the-founder-population-of-domesticated-narrow-leafed-lupin
#7
Mahsa Mousavi-Derazmahalleh, Bruno Nevado, Philipp E Bayer, Dmitry A Filatov, James K Hane, David Edwards, William Erskine, Matthew N Nelson
This study revealed that the western Mediterranean provided the founder population for domesticated narrow-leafed lupin and that genetic diversity decreased significantly during narrow-leafed lupin domestication. The evolutionary history of plants during domestication profoundly shaped the genome structure and genetic diversity of today's crops. Advances in next-generation sequencing technologies allow unprecedented opportunities to understand genome evolution in minor crops, which constitute the majority of plant domestications...
September 17, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/30225642/identification-of-novel-recessive-gene-xa44-t-conferring-resistance-to-bacterial-blight-races-in-rice-by-qtl-linkage-analysis-using-an-snp-chip
#8
Suk-Man Kim
Using QTL analysis and fine mapping, the novel recessive gene xa44(t) conferring resistance to BB was identified and the expression level of the gene was confirmed through qRT-PCR analysis. Bacterial blight (BB) disease caused by Xanthomonas oryzae pv. oryzae (Xoo) is a major factor causing rice yield loss in most rice-cultivating countries, especially in Asia. The deployment of cultivars with resistance to BB is the most effective method to control the disease. However, the evolution of new Xoo or pathotypes altered by single-gene-dependent mutations often results in breakdown of resistance...
September 17, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/30225641/fine-mapping-ruv2-a-new-rust-resistance-gene-in-cowpea-vigna-unguiculata-to-a-193-kb-region-enriched-with-nbs-type-genes
#9
Xinyi Wu, Guojing Li, Baogen Wang, Yaowen Hu, Xiaohua Wu, Ying Wang, Zhongfu Lu, Pei Xu
A new rust resistance gene Ruv2 was fine-mapped in cowpea to a 193-kb region on chromosome 2, which harboured 23 predicted gene models enriched with NBS-type genes. ZN016 is a landrace vegetable cowpea highly resistant to rust. Two previous studies using mixed-spores inoculation suggested different modes of inheritance of rust resistance in ZN016. In this study, we initially developed a detached leaf assay with a purified single-rust isolate (Auv-LS). Using this approach, we assessed the inheritance of rust resistance in a recombinant inbred line (RIL) population and an F2 population, both derived from the cross of "ZN016" and the susceptible cultivar "Zhijiang282...
September 17, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/30219987/promoter-variations-in-a-homeobox-gene-bna10-lmi1-determine-lobed-leaves-in-rapeseed-brassica-napus-l
#10
Limin Hu, Hao Zhang, Qingyong Yang, Qingwei Meng, Shaoqing Han, Chinedu Charles Nwafor, Muhammad Hafeez Ullah Khan, Chuchuan Fan, Yongming Zhou
BnA10.LMI1 positively regulates the development of leaf lobes in Brassica napus, and cis-regulatory divergences cause the different allele effects. Leaf shape is an important agronomic trait, and large variations in this trait exist within the Brassica germplasm. The lobed leaf is a unique morphological characteristic for Brassica improvement. Nevertheless, the molecular basis of leaf lobing in Brassica is poorly understood. Here, we show that an incompletely dominant locus, BnLLA10, is responsible for the lobed-leaf shape in rapeseed...
September 15, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/30218294/genome-wide-association-study-of-heading-and-flowering-dates-and-construction-of-its-prediction-equation-in-chinese-common-wheat
#11
REVIEW
Xiangfen Zhang, Jianhui Chen, Yan Yan, Xuefang Yan, Chaonan Shi, Lei Zhao, Feng Chen
Heading date is one of the most important traits in wheat breeding as it affects adaptation and yield potential. A genome-wide association study (GWAS) using the 90 K iSelect SNP genotyping assay indicated that a total of 306 loci were significantly associated with heading and flowering dates in 13 environments in Chinese common wheat from the Yellow and Huai wheat region. Of these, 105 loci were significantly correlated with both heading and flowering dates and were found in clusters on chromosomes 2, 5, 6, and 7...
September 14, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/30194521/cavil1-a-plant-homeodomain-gene-that-promotes-flowering-in-pepper
#12
Vijee Mohan, Yelena Borovsky, Itzhak Kamara, Hanita Zemach, Ilan Paran
CaVIL1 is a homolog of VIL1, a regulator of vernalization response in Arabidopsis and acts as a flowering promoter in pepper which does not respond to vernalization and photoperiod. As part of our goal to study the genetic and molecular basis of transition to flowering in pepper, we isolated the late-flowering mutant E-2698. Aside from late flowering, multiple pleiotropic alterations of the shoot structure, such as enlarged and distorted leaves, weak apical dominance, and reduced angle of the lateral branches were observed, indicating a broad role for the mutated gene in pepper development...
September 7, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/30191251/identification-of-a-locus-in-maize-controlling-response-to-a-host-selective-toxin-derived-from-cochliobolus-heterostrophus-causal-agent-of-southern-leaf-blight
#13
Xie Xiaodong, Bode Olukolu, Qin Yang, Peter Balint-Kurti
A host-selective, proteinaceous maize toxin was identified from the culture filtrate of the maize pathogen Cochliobolus heterostrophus. A dominant gene for toxin susceptibility was identified on maize chromosome 4. A toxic activity was identified from the culture filtrate (CF) of the fungus Cochliobolus heterostrophus, causal agent of the maize disease southern leaf blight (SLB) with differential toxicity on maize lines. Two independent mapping populations; a 113-line recombinant inbred line population and a 258-line association population, were used to map loci associated with sensitivity to the CF at the seedling stage...
September 6, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/30178277/genetic-mapping-of-a-barley-leaf-rust-resistance-gene-rph26-introgressed-from-hordeum-bulbosum
#14
Xiaohui Yu, Hoi Yee Kong, Vijitha Meiyalaghan, Seona Casonato, Soonie Chng, E Eirian Jones, Ruth C Butler, Richard Pickering, Paul A Johnston
The quantitative barley leaf rust resistance gene, Rph26, was fine mapped within a H. bulbosum introgression on barley chromosome 1HL. This provides the tools for pyramiding with other resistance genes. A novel quantitative resistance gene, Rph26, effective against barley leaf rust (Puccinia hordei) was introgressed from Hordeum bulbosum into the barley (Hordeum vulgare) cultivar 'Emir'. The effect of Rph26 was to reduce the observed symptoms of leaf rust infection (uredinium number and infection type). In addition, this resistance also increased the fungal latency period and reduced the fungal biomass within infected leaves...
September 3, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/30167759/efficient-qtl-detection-of-flowering-date-in-a-soybean-ril-population-using-the-novel-restricted-two-stage-multi-locus-gwas-procedure
#15
Liyuan Pan, Jianbo He, Tuanjie Zhao, Guangnan Xing, Yufeng Wang, Deyue Yu, Shouyi Chen, Junyi Gai
Eighty-six R1 QTLs accounting for 89.92% phenotypic variance in a soybean RIL population were identified using RTM-GWAS with SNPLDB marker which performed superior over CIM and MLM-GWAS with BIN/SNPLDB marker. A population (NJRIKY) composed of 427 recombinant inbred lines (RILs) derived from Kefeng-1 × NN1138-2 (MGII × MGV, MG maturity group) was applied for detecting flowering date (R1) quantitative trait locus (QTL) system in soybean. From a low-depth re-sequencing (~ 0.75 ×), 576,874 SNPs were detected and organized into 4737 BINs (recombination breakpoint determinations) and 3683 SNP linkage disequilibrium blocks (SNPLDBs), respectively...
August 30, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/30167758/pm62-an-adult-plant-powdery-mildew-resistance-gene-introgressed-from-dasypyrum-villosum-chromosome-arm-2vl-into-wheat
#16
Ruiqi Zhang, Yali Fan, Lingna Kong, Zuojun Wang, Jizhong Wu, Liping Xing, Aizhong Cao, Yigao Feng
Pm62, a novel adult-plant resistance (APR) gene against powdery mildew, was transferred from D. villosum into common wheat in the form of Robertsonian translocation T2BS.2VL#5. Powdery mildew, which is caused by the fungus Blumeria graminis f. sp. tritici, is a major disease of wheat resulting in substantial yield and quality losses in many wheat production regions of the world. Introgression of resistance from wild species into common wheat has application for controlling this disease. A Triticum durum-Dasypyrum villosum chromosome 2V#5 disomic addition line, N59B-1 (2n = 30), improved resistance to powdery mildew at the adult-plant stage, which was attributable to chromosome 2V#5...
August 30, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/30159644/improved-genetic-resolution-for-linkage-mapping-of-resistance-to-potato-wart-in-monoparental-dihaploids-with-potential-diagnostic-value-in-tetraploid-potato-varieties
#17
Annette Bartkiewicz, Friederike Chilla, Diro Terefe-Ayana, Jens Lübeck, Josef Strahwald, Eckhard Tacke, Hans-Reinhard Hofferbert, Kerstin Flath, Marcus Linde, Thomas Debener
We achieved improved mapping resolution of the major wart resistance locus Xla-TNL containing also Sen1 in a dihaploid population using SNP data and developed additional markers with diagnostic value in tetraploid varieties. We analyzed a segregating monoparental dihaploid potato population comprising 215 genotypes derived from a tetraploid variety that is highly resistant to Synchytrium endobioticum pathotypes 18 and 6. The clear bimodal segregation for both pathotypes indicated that a major dominant resistance factor in a simplex allele configuration was present in the tetraploid donor genotype...
August 29, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/30151748/resistance-to-rhynchosporium-commune-in-a-collection-of-european-spring-barley-germplasm
#18
Mark E Looseley, Lucie L Griffe, Bianca Büttner, Kathryn M Wright, Jill Middlefell-Williams, Hazel Bull, Paul D Shaw, Malcolm Macaulay, Allan Booth, Günther Schweizer, Joanne R Russell, Robbie Waugh, William T B Thomas, Anna Avrova
Association analyses of resistance to Rhynchosporium commune in a collection of European spring barley germplasm detected 17 significant resistance quantitative trait loci. The most significant association was confirmed as Rrs1. Rhynchosporium commune is a fungal pathogen of barley which causes a highly destructive and economically important disease known as rhynchosporium. Genome-wide association mapping was used to investigate the genetic control of host resistance to R. commune in a collection of predominantly European spring barley accessions...
August 27, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/30143828/a-major-qtl-on-chromosome-c05-significantly-reduces-acid-detergent-lignin-adl-content-and-increases-seed-oil-and-protein-content-in-oilseed-rape-brassica-napus-l
#19
Nina Behnke, Edy Suprianto, Christian Möllers
A reduction in acid detergent lignin content in oilseed rape resulted in an increase in seed oil and protein content. Worldwide increasing demand for vegetable oil and protein requires continuous breeding efforts to enhance the yield of oil and protein crop species. The oil-extracted meal of oilseed rape is currently mainly used for feeding livestock, but efforts are undertaken to use the oilseed rape protein in food production. One limiting factor is the high lignin content of black-seeded oilseed rape that negatively affects digestibility and sensory quality of food products compared to soybean...
August 24, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/30141064/reassessment-of-the-evolution-of-wheat-chromosomes-4a-5a-and-7b
#20
Jan Dvorak, Le Wang, Tingting Zhu, Chad M Jorgensen, Ming-Cheng Luo, Karin R Deal, Yong Q Gu, Bikram S Gill, Assaf Distelfeld, Katrien M Devos, Peng Qi, Patrick E McGuire
Comparison of genome sequences of wild emmer wheat and Aegilops tauschii suggests a novel scenario of the evolution of rearranged wheat chromosomes 4A, 5A, and 7B. Past research suggested that wheat chromosome 4A was subjected to a reciprocal translocation T(4AL;5AL)1 that occurred in the diploid progenitor of the wheat A subgenome and to three major rearrangements that occurred in polyploid wheat: pericentric inversion Inv(4AS;4AL)1, paracentric inversion Inv(4AL;4AL)1, and reciprocal translocation T(4AL;7BS)1...
August 23, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
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