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TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik

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https://www.readbyqxmd.com/read/30008108/brflc5-a-weak-regulator-of-flowering-time-in-brassica-rapa
#1
Xi Xi, Keyun Wei, Baozhen Gao, Jiahe Liu, Jianli Liang, Feng Cheng, Xiaowu Wang, Jian Wu
A splicing site mutation in BrFLC5, a non-syntenic paralogue of FLOWERING LOCUS C, was demonstrated to be related to flowering time variation in Brassica rapa. Flowering time regulation in Brassica rapa is more complex than in Arabidopsis, as there are multiple paralogues of flowering time genes in B. rapa. Brassica rapa contains four FLOWERING LOCUS C (FLC) genes, three of which are syntenic orthologues of AtFLC, while BrFLC5 is not. BrFLC1, BrFLC2, and BrFLC3 have been reported to be involved in flowering time regulation...
July 14, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/30006836/pyramiding-of-nine-transgenes-in-maize-generates-high-level-resistance-against-necrotrophic-maize-pathogens
#2
Xiang Zhu, Jinfeng Zhao, Hafiz Muhammad Khalid Abbas, Yunjun Liu, Menglan Cheng, Jue Huang, Wenjuan Cheng, Beibei Wang, Cuiying Bai, Guoying Wang, Wubei Dong
Key message Nine transgenes from different categories, viz. plant defense response genes and anti-apoptosis genes, played combined roles in maize to inhibit the necrotrophic pathogens Rhizoctonia solani and Bipolaris maydis. Maize sheath blight and southern corn leaf blight are major global threats to maize production. The management of these necrotrophic pathogens has encountered limited success due to the characteristics of their lifestyle. Here, we presented a transgenic pyramiding breeding strategy to achieve nine different resistance genes integrated in one transgenic maize line to combat different aspects of necrotrophic pathogens...
July 13, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/30003290/correction-to-development-and-characterization-of-a-spring-hexaploid-wheat-line-with-no-functional-vrn2-genes
#3
Nestor Kippes, Andrew Chen, Xiaoqin Zhang, Adam J Lukaszewski, Jorge Dubcovsky
In the original version of this article, PCR fragments and digestion product sizes for the VRN-B2 and VRN-D2 markers were not accurate. The corrected sizes are detailed below.
July 12, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29998372/a-comprehensive-and-precise-set-of-intervarietal-substitution-lines-to-identify-candidate-genes-and-quantitative-trait-loci-in-oilseed-rape-brassica-napus-l
#4
Shanjing Yang, Bao Zhang, Gang Liu, Baohua Hong, Jinsong Xu, Xun Chen, Bo Wang, Zhikun Wu, Fan Hou, Xiaopeng Yue, Jing Wang, Qinghua Zhang, Graham J King, Kede Liu
A set of intervarietal substitution lines were developed in rapeseed by recurrent backcrossing and marker-assisted selection and employed for mapping both qualitative and quantitative traits. Intervarietal substitution lines (ISLs) may be assembled into advanced secondary mapping populations that have remarkable potential for resolving trait loci and mapping candidate genes. To facilitate the identification of important genes in oilseed rape (canola, Brassica napus), we developed 89 ISLs using an elite cultivar 'Zhongyou 821' (ZY821) as the recipient and a re-synthesized line 'No...
July 11, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29992369/from-zero-to-hero-the-past-present-and-future-of-grain-amaranth-breeding
#5
REVIEW
Dinesh C Joshi, Salej Sood, Rajashekara Hosahatti, Lakshmi Kant, A Pattanayak, Anil Kumar, Dinesh Yadav, Markus G Stetter
Grain amaranth is an underutilized crop with high nutritional quality from the Americas. Emerging genomic and biotechnological tools are becoming available that allow the integration of novel breeding techniques for rapid improvement of amaranth and other underutilized crops. Out of thousands of edible plants, only three cereals-maize, wheat and rice-are the major food sources for a majority of people worldwide. While these crops provide high amounts of calories, they are low in protein and other essential nutrients...
July 10, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29982848/identifying-molecular-markers-suitable-for-frl-selection-in-tomato-breeding
#6
Zübeyir Devran, Erdem Kahveci, Yiguo Hong, David J Studholme, Mahmut Tör
Modern plant breeding heavily relies on the use of molecular markers. In recent years, next generation sequencing (NGS) emerged as a powerful technology to discover DNA sequence polymorphisms and generate molecular markers very rapidly and cost effectively, accelerating the plant breeding programmes. A single dominant locus, Frl, in tomato provides resistance to the fungal pathogen Fusarium oxysporum f. sp. radicis-lycopersici (FORL), causative agent of Fusarium crown and root rot. In this study, we describe the generation of molecular markers associated with the Frl locus...
July 7, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29971473/the-soybean-experiment-1000-gardens-a-case-study-of-citizen-science-for-research-education-and-beyond
#7
Tobias Würschum, Willmar L Leiser, Felix Jähne, Kristina Bachteler, Martin Miersch, Volker Hahn
Citizen science, an approach that includes normal citizens in scientific research, holds great potential also for plant sciences and breeding and can be a powerful research tool to complement traditional approaches. Citizen science is an approach that includes normal citizens in scientific research, but has so far not been exploited by the various disciplines in plant sciences. Moreover, global threats challenge human well-being and science can provide solutions, but needs to leave the ivory tower in the mind of the broader public...
July 3, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29971472/identification-of-powdery-mildew-resistance-qtl-in-strawberry-fragaria-%C3%A3-ananassa
#8
Helen M Cockerton, Robert J Vickerstaff, Amanda Karlström, Fiona Wilson, Maria Sobczyk, Joe Q He, Daniel J Sargent, Andy J Passey, Kirsty J McLeary, Katalin Pakozdi, Nicola Harrison, Maria Lumbreras-Martinez, Laima Antanaviciute, David W Simpson, Richard J Harrison
Key Message Powdery mildew resistance in two strawberry mapping populations is controlled by both stable and transient novel QTL of moderate effect. Some low transferability of QTL across wider germplasm was observed. The obligate biotrophic fungus Podosphaera aphanis is the causative agent of powdery mildew on cultivated strawberry (Fragaria × ananassa). Genotypes from two bi-parental mapping populations 'Emily' × 'Fenella' and 'Redgauntlet' × 'Hapil' were phenotyped for powdery mildew disease severity in a series of field trials...
July 3, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29971471/development-of-an-x-specific-marker-and-identification-of-yy-individuals-in-spinach
#9
William H Wadlington, Ray Ming
Spinach is a popular vegetable native to central and western Asia. It is dioecious with a pair of nascent sex chromosomes. The difficulties of working with the non-recombining sex determination region of XY individuals have hindered the progress toward sequencing sex chromosomes of most dioecious species. Here we present important advances toward characterizing the non-recombining sex chromosomes in spinach. Of nearly 400 spinach accessions screened, we identified a single accession of spinach in which androdioecious XY individuals segregate YY spinach...
July 3, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29967989/pm61-a-recessive-gene-for-resistance-to-powdery-mildew-in-wheat-landrace-xuxusanyuehuang-identified-by-comparative-genomics-analysis
#10
Huigai Sun, Jinghuang Hu, Wei Song, Dan Qiu, Lei Cui, Peipei Wu, Hongjun Zhang, Hongwei Liu, Li Yang, Yunfeng Qu, Yahui Li, Teng Li, Wei Cheng, Yang Zhou, Zhiyong Liu, Jingting Li, Hongjie Li
A single recessive powdery mildew resistance gene Pm61 from wheat landrace Xuxusanyuehuang was mapped within a 0.46-cM genetic interval spanning a 1.3-Mb interval of the genomic region of chromosome arm 4AL. Epidemics of powdery mildew incited by the biotrophic fungus Blumeria graminis f. sp. tritici (Bgt) have caused significant yield reductions in many wheat (Triticum aestivum)-producing regions. Identification of powdery mildew resistance genes is required for sustainable improvement of wheat for disease resistance...
July 2, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29961103/the-early-flowering-trait-of-an-emmer-wheat-accession-triticum-turgidum-l-ssp-dicoccum-is-associated-with-the-cis-element-of-the-vrn-a3-locus
#11
Kazusa Nishimura, Ryuji Moriyama, Keisuke Katsura, Hiroki Saito, Rihito Takisawa, Akira Kitajima, Tetsuya Nakazaki
We identified a novel allele of the Vrn-A3 gene that is associated with an early flowering trait in wheat. This trait is caused by a cis-element GATA box in Vrn-A3. To identify novel flowering genes in wheat, we investigated days from germination to heading (DGH) in tetraploid wheat accessions. We found that the tetraploid variety Triticum turgidum L. ssp. dicoccum (TN26) harbors unknown genes that surpass the earliness effect of the early flowering allele Ppd-A1a harbored by TN28 (T. turgidum L. ssp. turgidum conv...
June 30, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29961102/multi-environment-qtl-analysis-of-plant-and-flower-morphological-traits-in-tetraploid-rose
#12
Peter M Bourke, Virginia W Gitonga, Roeland E Voorrips, Richard G F Visser, Frans A Krens, Chris Maliepaard
Rose morphological traits such as prickles or petal number are influenced by a few key QTL which were detected across different growing environments-necessary for genomics-assisted selection in non-target environments. Rose, one of the world's most-loved and commercially important ornamental plants, is predominantly tetraploid, possessing four rather than two copies of each chromosome. This condition complicates genetic analysis, and so the majority of previous genetic studies in rose have been performed at the diploid level...
June 30, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29959472/identification-and-characterization-of-rht25-a-locus-on-chromosome-arm-6as-affecting-wheat-plant-height-heading-time-and-spike-development
#13
Youngjun Mo, Leonardo S Vanzetti, Iago Hale, Emiliano J Spagnolo, Fabio Guidobaldi, Jassim Al-Oboudi, Natalie Odle, Stephen Pearce, Marcelo Helguera, Jorge Dubcovsky
This study identified Rht25, a new plant height locus on wheat chromosome arm 6AS, and characterized its pleiotropic effects on important agronomic traits. Understanding genes regulating wheat plant height is important to optimize harvest index and maximize grain yield. In modern wheat varieties grown under high-input conditions, the gibberellin-insensitive semi-dwarfing alleles Rht-B1b and Rht-D1b have been used extensively to confer lodging tolerance and improve harvest index. However, negative pleiotropic effects of these alleles (e...
June 29, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29959471/phenotypic-and-genetic-analysis-of-spike-and-kernel-characteristics-in-wheat-reveals-long-term-genetic-trends-of-grain-yield-components
#14
Tobias Würschum, Willmar L Leiser, Simon M Langer, Matthew R Tucker, C Friedrich H Longin
Phenotypic and genetic analysis of six spike and kernel characteristics in wheat revealed geographic patterns as well as long-term trends arising from breeding progress, particularly in regard to spikelet fertility, i.e. the number of kernels per spikelet, a grain yield component that appears to underlie the increase in the number of kernels per spike. Wheat is a staple crop of global relevance that faces continuous demands for improved grain yield. In this study, we evaluated a panel of 407 winter wheat cultivars for six characteristics of spike and kernel development...
June 29, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29959470/unlocking-historical-phenotypic-data-from-an-ex-situ-collection-to-enhance-the-informed-utilization-of-genetic-resources-of-barley-hordeum-sp
#15
Maria Y González, Norman Philipp, Albert W Schulthess, Stephan Weise, Yusheng Zhao, Andreas Börner, Markus Oppermann, Andreas Graner, Jochen C Reif
Key message Historical data generated during seed regeneration are valuable to populate a bio-digital resource center for barley (Hordeum sp.). Precise estimates of trait performance of genetic resources are considered as an intellectually challenging, complex, costly and time-consuming step needed to exploit the phenotypic and genetic diversity maintained in genebanks for breeding and research. Using barley (Hordeum sp.) as a model, we examine strategies to tap into historical data available from regeneration trials...
June 29, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29909527/comparative-genome-wide-mapping-versus-extreme-pool-genotyping-and-development-of-diagnostic-snp-markers-linked-to-qtl-for-adult-plant-resistance-to-stripe-rust-in-common-wheat
#16
Jianhui Wu, Shuo Huang, Qingdong Zeng, Shengjie Liu, Qilin Wang, Jingmei Mu, Shizhou Yu, Dejun Han, Zhensheng Kang
A major stripe rust resistance QTL on chromosome 4BL was localized to a 4.5-Mb interval using comparative QTL mapping methods and validated in 276 wheat genotypes by haplotype analysis. CYMMIT-derived wheat line P10103 was previously identified to have adult plant resistance (APR) to stripe rust in the greenhouse and field. The conventional approach for QTL mapping in common wheat is laborious. Here, we performed QTL detection of APR using a combination of genome-wide scanning and extreme pool-genotyping. SNP-based genetic maps were constructed using the Wheat55 K SNP array to genotype a recombinant inbred line (RIL) population derived from the cross Mingxian 169 × P10103...
June 16, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29909526/a-bean-common-mosaic-virus-bcmv-resistance-gene-is-fine-mapped-to-the-same-region-as-rsv1-h-in-the-soybean-cultivar-suweon-97
#17
Mian Wu, Wen-Ping Wu, Cheng-Chen Liu, Ying-Na Liu, Xiao-Yi Wu, Fang-Fang Ma, An-Qi Zhu, Jia-Yin Yang, Bin Wang, Jian-Qun Chen
In the soybean cultivar Suweon 97, BCMV-resistance gene was fine-mapped to a 58.1-kb region co-localizing with the Soybean mosaic virus (SMV)-resistance gene, Rsv1-h raising a possibility that the same gene is utilized against both viral pathogens. Certain soybean cultivars exhibit resistance against soybean mosaic virus (SMV) or bean common mosaic virus (BCMV). Although several SMV-resistance loci have been reported, the understanding of the mechanism underlying BCMV resistance in soybean is limited. Here, by crossing a resistant cultivar Suweon 97 with a susceptible cultivar Williams 82 and inoculating 220 F2 individuals with a BCMV strain (HZZB011), we observed a 3:1 (resistant/susceptible) segregation ratio, suggesting that Suweon 97 possesses a single dominant resistance gene against BCMV...
June 16, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29947816/structural-chromosome-rearrangements-and-polymorphisms-identified-in-chinese-wheat-cultivars-by-high-resolution-multiplex-oligonucleotide-fish
#18
Xinyi Huang, Minqiu Zhu, Lifang Zhuang, Siyu Zhang, Junjuan Wang, Xuejun Chen, Danrui Wang, Jianyong Chen, Yinguang Bao, Jie Guo, Jinlong Zhang, Yigao Feng, Chenggen Chu, Pei Du, Zengjun Qi, Honggang Wang, Peidu Chen
High-resolution multiplex oligonucleotide FISH revealed the frequent occurrence of structural chromosomal rearrangements and polymorphisms in widely grown wheat cultivars and their founders. Over 2000 wheat cultivars including 19 founders were released and grown in China from 1949 to 2000. To understand the impact of breeding selection on chromosome structural variations, high-resolution karyotypes of Chinese Spring (CS) and 373 Chinese cultivars were developed and compared by FISH (fluorescence in situ hybridization) using an oligonucleotide multiplex probe based on repeat sequences...
June 15, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29876589/optimal-cross-selection-for-long-term-genetic-gain-in-two-part-programs-with-rapid-recurrent-genomic-selection
#19
Gregor Gorjanc, R Chris Gaynor, John M Hickey
Key message Optimal cross selection increases long-term genetic gain of two-part programs with rapid recurrent genomic selection. It achieves this by optimising efficiency of converting genetic diversity into genetic gain through reducing the loss of genetic diversity and reducing the drop of genomic prediction accuracy with rapid cycling. This study evaluates optimal cross selection to balance selection and maintenance of genetic diversity in two-part plant breeding programs with rapid recurrent genomic selection...
June 6, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29869075/molecular-mapping-of-qtl-for-fusarium-head-blight-resistance-introgressed-into-durum-wheat
#20
Mingxia Zhao, Yueqiang Leng, Shiaoman Chao, Steven S Xu, Shaobin Zhong
The major QTL for FHB resistance from hexaploid wheat line PI 277012 was successfully introgressed into durum wheat and minor FHB resistance QTL were detected in local durum wheat cultivars. A combination of these QTL will enhance FHB resistance of durum wheat. Fusarium head blight (FHB), caused by Fusarium graminearum, is a devastating disease of durum wheat. To combat the disease, great efforts have been devoted to introgress FHB resistance from its related tetraploid and hexaploid wheat species into adapted durum cultivars...
June 4, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
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