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TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik

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https://www.readbyqxmd.com/read/29150697/a-novel-allele-of-tagw2-a1-is-located-in-a-finely-mapped-qtl-that-increases-grain-weight-but-decreases-grain-number-in-wheat-triticum-aestivum-l
#1
Huijie Zhai, Zhiyu Feng, Xiaofen Du, Yane Song, Xinye Liu, Zhongqi Qi, Long Song, Jiang Li, Linghong Li, Huiru Peng, Zhaorong Hu, Yingyin Yao, Mingming Xin, Shihe Xiao, Qixin Sun, Zhongfu Ni
A novel TaGW2-A1 allele was identified from a stable, robust QTL region, which is pleiotropic for thousand grain weight, grain number per spike, and grain morphometric parameters in wheat. Thousand grain weight (TGW) and grain number per spike (GNS) are two crucial determinants of wheat spike yield, and genetic dissection of their relationships can help to fine-tune these two components and maximize grain yield. By evaluating 191 recombinant inbred lines in 11 field trials, we identified five genomic regions on chromosomes 1B, 3A, 3B, 5B, or 7A that solely influenced either TGW or GNS, and a further region on chromosome 6A that concurrently affected TGW and GNS...
November 17, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29147724/glabrous-cmgl-encodes-a-hd-zip-iv-transcription-factor-playing-roles-in-multicellular-trichome-initiation-in-melon
#2
Huayu Zhu, Xiaofen Sun, Qi Zhang, Pengyao Song, Qianmei Hu, Xiaojing Zhang, Xiang Li, Jianbin Hu, Junsong Pan, Shouru Sun, Yiqun Weng, Luming Yang
Map-based cloning identified CmGL that encodes a HD-ZIP type IV transcription factor that controls multicellular trichome initiation in melon. Trichomes are small hairs covering the aerial parts of plants that originate from the epidermal cells, which can protect plants against the damage by insects and pathogens. The regulatory pathway of unicellular trichomes has been well studied in the model plant Arabidopsis. Little is known about the genetic control and regulation of trichome development in melon (Cucumis melo L...
November 17, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29147737/genetic-dissection-of-early-season-cold-tolerance-in-sorghum-genome-wide-association-studies-for-seedling-emergence-and-survival-under-field-and-controlled-environment-conditions
#3
Sebastian Parra-Londono, Karin Fiedler, Mareike Kavka, Birgit Samans, Silke Wieckhorst, Arndt Zacharias, Ralf Uptmoor
A QTL on sorghum chromosome SBI-06 putatively improves field emergence under low-temperature conditions. Low temperatures decisively limit seedling emergence and vigor during early growth of sorghum and, thus, strongly impair geographical expansion. To broaden sorghum cultivation to temperate regions, the establishment of cold-tolerant genotypes is a prioritized breeding goal. The present study aims at the quantification of seedling emergence and survival under chilling temperatures and the detection of marker-trait associations controlling temperature-related seedling establishment...
November 16, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29143067/characterization-and-fine-mapping-of-qkc7-03-a-major-locus-for-kernel-cracking-in-maize
#4
Mingtao Yang, Lin Chen, Xun Wu, Xing Gao, Chunhui Li, Yanchun Song, Dengfeng Zhang, Yunsu Shi, Yu Li, Yong-Xiang Li, Tianyu Wang
A major locus conferring kernel cracking in maize was characterized and fine mapped to an interval of 416.27 kb. Meanwhile, combining the results of transcriptomic analysis, the candidate gene was inferred. Seed development requires a proper structural and physiological balance between the maternal tissues and the internal structures of the seeds. In maize, kernel cracking is a disorder in this balance that seriously limits quality and yield and is characterized by a cracked pericarp at the kernel top and endosperm everting...
November 15, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29138904/rice-diversity-panel-provides-accurate-genomic-predictions-for-complex-traits-in-the-progenies-of-biparental-crosses-involving-members-of-the-panel
#5
M Ben Hassen, T V Cao, J Bartholomé, G Orasen, C Colombi, J Rakotomalala, L Razafinimpiasa, C Bertone, C Biselli, A Volante, F Desiderio, L Jacquin, G Valè, N Ahmadi
Rice breeding programs based on pedigree schemes can use a genomic model trained with data from their working collection to predict performances of progenies produced through rapid generation advancement. So far, most potential applications of genomic prediction in plant improvement have been explored using cross validation approaches. This is the first empirical study to evaluate the accuracy of genomic prediction of the performances of progenies in a typical rice breeding program. Using a cross validation approach, we first analyzed the effects of marker selection and statistical methods on the accuracy of prediction of three different heritability traits in a reference population (RP) of 284 inbred accessions...
November 14, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29138903/next-generation-sequencing-to-identify-candidate-genes-and-develop-diagnostic-markers-for-a-novel-phytophthora-resistance-gene-rpshc18-in-soybean
#6
Chao Zhong, Suli Sun, Yinping Li, Canxing Duan, Zhendong Zhu
A novel Phytophthora sojae resistance gene RpsHC18 was identified and finely mapped on soybean chromosome 3. Two NBS-LRR candidate genes were identified and two diagnostic markers of RpsHC18 were developed. Phytophthora root rot caused by Phytophthora sojae is a destructive disease of soybean. The most effective disease-control strategy is to deploy resistant cultivars carrying Phytophthora-resistant Rps genes. The soybean cultivar Huachun 18 has a broad and distinct resistance spectrum to 12 P. sojae isolates...
November 14, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29134240/fine-mapping-of-a-male-sterility-gene-ms-3-in-a-novel-cucumber-cucumis-sativus-l-mutant
#7
Yike Han, Fengyue Zhao, Shang Gao, Xianyun Wang, Aimin Wei, Zhengwu Chen, Nan Liu, Xueqiang Tong, Xinmeng Fu, Changlong Wen, Zhenxian Zhang, Ningning Wang, Shengli Du
The cucumber male sterility gene ms - 3 was fine mapped in a 76 kb region harboring an MMD1 -like gene Csa3M006660 that may be responsible for the male sterile in cucumber. A cucumber (Cucumis sativus L.) male sterile mutant (ms-3) in an advanced-generation inbred line was identified, and genetic analysis revealed that the male sterility trait was controlled by a recessive nuclear gene, ms-3, which was stably inherited. Histological studies suggested that the main cause of the male sterility was defective microsporogenesis, resulting in no tetrad or microspores being formed...
November 13, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29124282/development-of-a-complete-set-of-wheat-barley-group-7-robertsonian-translocation-chromosomes-conferring-an-increased-content-of-%C3%AE-glucan
#8
Tatiana V Danilova, Bernd Friebe, Bikram S Gill, Jesse Poland, Eric Jackson
A complete set of six compensating Robertsonian translocation chromosomes involving barley chromosome 7H and three chromosomes of hexaploid wheat was produced. Grain β-glucan content increased in lines containing 7HL. Many valuable genes for agronomic performance, disease resistance and increased yield have been transferred from relative species to wheat (Triticum aestivum L.) through whole-arm Robertsonian translocations (RobT). Although of a great value, the sets of available translocations from barley (Hordeum vulgare L...
November 10, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29116330/identification-and-mapping-of-ts-tender-spines-a-gene-involved-in-soft-spine-development-in-cucumis-sativus
#9
Chunli Guo, Xuqin Yang, Yunli Wang, Jingtao Nie, Yi Yang, Jingxian Sun, Hui Du, Wenying Zhu, Jian Pan, Yue Chen, Duo Lv, Huanle He, Hongli Lian, Junsong Pan, Run Cai
Using map-based cloning of ts gene, we identified a new sort of gene involved in the initiation of multicellular tender spine in cucumber. The cucumber (Cucumis sativus L.) fruit contains spines on the surface, which is an extremely valuable quality trait affecting the selection of customers. In this study, we elaborated cucumber line NC072 with wild type (WT) hard fruit spines and its spontaneous mutant NC073, possessing tender and soft spines on fruits. The mutant trait was named as tender spines (ts), which is controlled by a single recessive nuclear gene...
November 7, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29103142/unlocking-the-diversity-of-genebanks-whole-genome-marker-analysis-of-swiss-bread-wheat-and-spelt
#10
Thomas Müller, Beate Schierscher-Viret, Dario Fossati, Cécile Brabant, Arnold Schori, Beat Keller, Simon G Krattinger
High-throughput genotyping of Swiss bread wheat and spelt accessions revealed differences in their gene pools and identified bread wheat landraces that were not used in breeding. Genebanks play a pivotal role in preserving the genetic diversity present among old landraces and wild progenitors of modern crops and they represent sources of agriculturally important genes that were lost during domestication and in modern breeding. However, undesirable genes that negatively affect crop performance are often co-introduced when landraces and wild crop progenitors are crossed with elite cultivars, which often limit the use of genebank material in modern breeding programs...
November 4, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29101420/characterisation-of-thinopyrum-bessarabicum-chromosomes-through-genome-wide-introgressions-into-wheat
#11
Surbhi Grewal, Caiyun Yang, Stella Hubbart Edwards, Duncan Scholefield, Stephen Ashling, Amanda J Burridge, Ian P King, Julie King
Genome-wide introgressions of Thinopyrum bessarabicum into wheat resulted in 12 recombinant lines. Cytological and molecular techniques allowed mapping of 1150 SNP markers across all seven chromosomes of the J genome. Thinopyrum bessarabicum (2n = 2x = 14, JJ) is an important source for new genetic variation for wheat improvement due to its salinity tolerance and disease resistance. Its practical utilisation in wheat improvement can be facilitated through development of genome-wide introgressions leading to a variety of different wheat-Th ...
November 3, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29098311/a-single-nucleotide-polymorphism-in-the-fra-gene-results-in-fractured-starch-granules-in-barley
#12
Mika Saito, Tsuyoshi Tanaka, Kazuhiro Sato, Patricia Vrinten, Toshiki Nakamura
We report here that the mutation causing fractured starch granules in the barley line "Franubet" results from a point mutation in the barley gene corresponding to the rice FLO6 gene. The "fra" mutation in barley, which was originally isolated and characterized over 30 years ago, results in fractured starch granules and an opaque phenotype. This mutation has been used in breeding programs, since it appears to be useful in the production of pearled barley for human consumption. However, selection for this phenotype is difficult, since wild-type and heterozygous kernels cannot be distinguished phenotypically, and until now, the gene involved in this mutation has not been determined...
November 2, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29098310/comparison-of-gwas-models-to-identify-non-additive-genetic-control-of-flowering-time-in-sunflower-hybrids
#13
Fanny Bonnafous, Ghislain Fievet, Nicolas Blanchet, Marie-Claude Boniface, Sébastien Carrère, Jérôme Gouzy, Ludovic Legrand, Gwenola Marage, Emmanuelle Bret-Mestries, Stéphane Munos, Nicolas Pouilly, Patrick Vincourt, Nicolas Langlade, Brigitte Mangin
This study compares five models of GWAS, to show the added value of non-additive modeling of allelic effects to identify genomic regions controlling flowering time of sunflower hybrids. Genome-wide association studies are a powerful and widely used tool to decipher the genetic control of complex traits. One of the main challenges for hybrid crops, such as maize or sunflower, is to model the hybrid vigor in the linear mixed models, considering the relatedness between individuals. Here, we compared two additive and three non-additive association models for their ability to identify genomic regions associated with flowering time in sunflower hybrids...
November 2, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29094182/molecular-cytogenetic-and-genomic-analyses-reveal-new-insights-into-the-origin-of-the-wheat-b-genome
#14
Wei Zhang, Mingyi Zhang, Xianwen Zhu, Yaping Cao, Qing Sun, Guojia Ma, Shiaoman Chao, Changhui Yan, Steven S Xu, Xiwen Cai
This work pinpointed the goatgrass chromosomal segment in the wheat B genome using modern cytogenetic and genomic technologies, and provided novel insights into the origin of the wheat B genome. Wheat is a typical allopolyploid with three homoeologous subgenomes (A, B, and D). The donors of the subgenomes A and D had been identified, but not for the subgenome B. The goatgrass Aegilops speltoides (genome SS) has been controversially considered a possible candidate for the donor of the wheat B genome. However, the relationship of the Ae...
November 1, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29080901/genome-wide-regression-models-considering-general-and-specific-combining-ability-predict-hybrid-performance-in-oilseed-rape-with-similar-accuracy-regardless-of-trait-architecture
#15
Christian R Werner, Lunwen Qian, Kai P Voss-Fels, Amine Abbadi, Gunhild Leckband, Matthias Frisch, Rod J Snowdon
Genomic prediction using the Brassica 60 k genotyping array is efficient in oilseed rape hybrids. Prediction accuracy is more dependent on trait complexity than on the prediction model. In oilseed rape breeding programs, performance prediction of parental combinations is of fundamental importance. Due to the phenomenon of heterosis, per se performance is not a reliable indicator for F1-hybrid performance, and selection of well-paired parents requires the testing of large quantities of hybrid combinations in extensive field trials...
October 28, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29071393/association-mapping-of-drought-tolerance-related-traits-in-barley-to-complement-a-traditional-biparental-qtl-mapping-study
#16
Magdalena Wójcik-Jagła, Anna Fiust, Janusz Kościelniak, Marcin Rapacz
Association mapping of drought-related traits in barley was used to increase the density of existing QTL maps without recreating mapping populations. We used 109 spring barley genotypes exhibiting high or low drought tolerance to elucidate the associations between diversity array technology sequencing (DArTseq) and single nucleotide polymorphism (SNP) markers and various physiological parameters related to plant responses to drought conditions. The study was performed in controlled conditions (growth chambers), drought tolerance was phenotyped in the four-leaf seedlings...
October 25, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29071392/a-transcriptome-snp-derived-linkage-map-of-apios-americana-potato-bean-provides-insights-about-genome-re-organization-and-synteny-conservation-in-the-phaseoloid-legumes
#17
Jugpreet Singh, Scott R Kalberer, Vikas Belamkar, Teshale Assefa, Matthew N Nelson, Andrew D Farmer, William J Blackmon, Steven B Cannon
We report a linkage map for Apios americana and describe synteny with selected warm-season legumes. A translocation event in common bean and soybean is confirmed against Apios and Vigna species. Apios (Apios americana; "apios"), a tuberous perennial legume in the Phaseoleae tribe, was widely used as a food by Native Americans. Work in the last 40 years has led to several improved breeding lines. Aspects of the pollination biology (complex floral structure and tripping mechanism) have made controlled crosses difficult, and the previous reports indicated that the plant is likely primarily an outcrosser...
October 25, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29063161/improving-the-baking-quality-of-bread-wheat-by-genomic-selection-in-early-generations
#18
Sebastian Michel, Christian Kummer, Martin Gallee, Jakob Hellinger, Christian Ametz, Batuhan Akgöl, Doru Epure, Franziska Löschenberger, Hermann Buerstmayr
Genomic selection shows great promise for pre-selecting lines with superior bread baking quality in early generations, 3 years ahead of labour-intensive, time-consuming, and costly quality analysis. The genetic improvement of baking quality is one of the grand challenges in wheat breeding as the assessment of the associated traits often involves time-consuming, labour-intensive, and costly testing forcing breeders to postpone sophisticated quality tests to the very last phases of variety development. The prospect of genomic selection for complex traits like grain yield has been shown in numerous studies, and might thus be also an interesting method to select for baking quality traits...
October 23, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29058050/chromosomes-a07-and-a05-associated-with-stable-and-major-qtls-for-pod-weight-and-size-in-cultivated-peanut-arachis-hypogaea-l
#19
Huaiyong Luo, Jianbin Guo, Xiaoping Ren, Weigang Chen, Li Huang, Xiaojing Zhou, Yuning Chen, Nian Liu, Fei Xiong, Yong Lei, Boshou Liao, Huifang Jiang
Co-localized intervals and candidate genes were identified for major and stable QTLs controlling pod weight and size on chromosomes A07 and A05 in an RIL population across four environments. Cultivated peanut (Arachis hypogaea L.) is an important legume crops grown in > 100 countries. Hundred-pod weight (HPW) is an important yield trait in peanut, but its underlying genetic mechanism was not well studied. In this study, a mapping population (Xuhua 13 × Zhonghua 6) with 187 recombinant inbred lines (RILs) was developed to map quantitative trait loci (QTLs) for HPW together with pod length (PL) and pod width (PW) by both unconditional and conditional QTL analyses...
October 20, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29058049/bayesian-estimation-and-use-of-high-throughput-remote-sensing-indices-for-quantitative-genetic-analyses-of-leaf-growth
#20
Robert L Baker, Wen Fung Leong, Nan An, Marcus T Brock, Matthew J Rubin, Stephen Welch, Cynthia Weinig
We develop Bayesian function-valued trait models that mathematically isolate genetic mechanisms underlying leaf growth trajectories by factoring out genotype-specific differences in photosynthesis. Remote sensing data can be used instead of leaf-level physiological measurements. Characterizing the genetic basis of traits that vary during ontogeny and affect plant performance is a major goal in evolutionary biology and agronomy. Describing genetic programs that specifically regulate morphological traits can be complicated by genotypic differences in physiological traits...
October 20, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
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