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TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik

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https://www.readbyqxmd.com/read/29340753/can-spelt-wheat-be-used-as-heterotic-group-for-hybrid-wheat-breeding
#1
Wessam Akel, Patrick Thorwarth, Vilson Mirdita, Elmar A Weissman, Guozheng Liu, Tobias Würschum, C Friedrich H Longin
Spelt wheat is a distinct genetic group to elite bread wheat, but heterosis for yield and protein quality is too low for spelt to be recommended as heterotic group for hybrid breeding in wheat. The feasibility to switch from line to hybrid breeding is currently a hot topic in the wheat community. One limitation seems to be the lack of divergent heterotic groups within wheat adapted to a certain region. Spelt wheat is a hexaploid wheat that can easily be crossed with bread wheat and that forms a divergent genetic group when compared to elite bread wheat...
January 16, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29340752/the-effect-of-indehiscent-point-mutations-on-silique-shatter-resistance-in-oilseed-rape-brassica-napus
#2
Janina Braatz, Hans-Joachim Harloff, Nazgol Emrani, Chirlon Elisha, Lars Heepe, Stanislav N Gorb, Christian Jung
This study elucidates the influence of indehiscent mutations on rapeseed silique shatter resistance. A phenotype with enlarged replum-valve joint area and altered cell dimensions in the dehiscence zone is described. Silique shattering is a major factor reducing the yield stability of oilseed rape (Brassica napus). Attempts to improve shatter resistance often include the use of mutations in target genes identified from Arabidopsis (Arabidopsis thaliana). A variety of phenotyping methods assessing the level of shatter resistance were previously described...
January 16, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29340751/correction-to-improving-the-baking-quality-of-bread-wheat-by-genomic-selection-in-early-generations
#3
Sebastian Michel, Christian Kummer, Martin Gallee, Jakob Hellinger, Christian Ametz, Batuhan Akgöl, Doru Epure, Huseyin Güngör, Franziska Löschenberger, Hermann Buerstmayr
Unfortunately, the co-author, Dr. Güngör was missed out in the authorship of original publication by mistake and it is updated now.
January 16, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29307117/genetic-mapping-of-quantitative-trait-loci-for-tuber-cadmium-and-zinc-concentration-in-potato-reveals-associations-with-maturity-and-both-overlapping-and-independent-components-of-genetic-control
#4
Molla F Mengist, Sheila Alves, Denis Griffin, Joanne Creedon, Mike J McLaughlin, Peter W Jones, Dan Milbourne
Cd is a toxic metal, whilst Zn is an essential for plant and human health. Both can accumulate in potato tubers. We examine the genetic control of this process. The aim of this study was to map quantitative trait loci (QTLs) influencing tuber concentrations of cadmium (Cd) and zinc (Zn). We developed a segregating population comprising 188 F1 progeny derived from crossing two tetraploid cultivars exhibiting divergent tuber-Cd-accumulation phenotypes. These progeny were genotyped using the SolCap 8303 SNP array, and evaluated for Cd, Zn, and maturity-related traits...
January 6, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29305701/qtl-seq-for-rapid-identification-of-candidate-genes-for-flowering-time-in-broccoli%C3%A2-%C3%A3-%C3%A2-cabbage
#5
Jinshuai Shu, Yumei Liu, Lili Zhang, Zhansheng Li, Zhiyuan Fang, Limei Yang, Mu Zhuang, Yangyong Zhang, Honghao Lv
A major QTL controlling early flowering in broccoli × cabbage was identified by marker analysis and next-generation sequencing, corresponding to GRF6 gene conditioning flowering time in Arabidopsis. Flowering is an important agronomic trait for hybrid production in broccoli and cabbage, but the genetic mechanism underlying this process is unknown. In this study, segregation analysis with BC1P1, BC1P2, F2, and F2:3 populations derived from a cross between two inbred lines "195" (late-flowering) and "93219" (early flowering) suggested that flowering time is a quantitative trait...
January 5, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29305700/genetic-architecture-of-aerial-and-root-traits-in-field-grown-grafted-grapevines-is-largely-independent
#6
Jean-Pascal Tandonnet, Elisa Marguerit, Sarah J Cookson, Nathalie Ollat
QTLs were identified for traits assessed on field-grown grafted grapevines. Root number and section had the largest phenotypic variance explained. Genetic control of root and aerial traits was independent. Breeding new rootstocks for perennial crops remains challenging, mainly because of the number of desirable traits which have to be combined, these traits include good rooting ability and root development. Consequently, the present study analyzes the genetic architecture of root traits in grapevine. A segregating progeny of 138 F1 genotypes issued from an inter-specific cross between Vitis vinifera cv...
January 5, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29302719/pyramiding-of-transgenic-pm3-alleles-in-wheat-results-in-improved-powdery-mildew-resistance-in-the-field
#7
Teresa Koller, Susanne Brunner, Gerhard Herren, Severine Hurni, Beat Keller
The combined effects of enhanced total transgene expression level and allele-specificity combination in transgenic allele-pyramided Pm3 wheat lines result in improved powdery mildew field resistance without negative pleiotropic effects. Allelic Pm3 resistance genes of wheat confer race-specific resistance to powdery mildew (Blumeria graminis f. sp. tritici, Bgt) and encode nucleotide-binding domain, leucine-rich repeat (NLR) receptors. Transgenic wheat lines overexpressing alleles Pm3a, b, c, d, f, and g have previously been generated by transformation of cultivar Bobwhite and tested in field trials, revealing varying degrees of powdery mildew resistance conferred by the transgenes...
January 4, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29299612/characterisation-of-a-novel-quantitative-trait-locus-gn4-1-for-grain-number-and-yield-in-rice-oryza-sativa-l
#8
Yong Zhou, Yajun Tao, Yuan Yuan, Yanzhou Zhang, Jun Miao, Ron Zhang, Chuandeng Yi, Zhiyun Gong, Zefeng Yang, Guohua Liang
A novel QTL for grain number, GN4-1, was identified and fine-mapped to an ~ 190-kb region on the long arm of rice chromosome 4. Rice grain yield is primarily determined by three components: number of panicles per plant, grain number per panicle and grain weight. Among these traits, grain number per panicle is the major contributor to grain yield formation and is a crucial trait for yield improvement. In this study, we identified a major quantitative trait locus (QTL) responsible for rice grain number on chromosome 4, designated GN4-1 (a QTL for Grain Number on chromosome 4), using advanced segregating populations derived from the crosses between an elite indica cultivar 'Zhonghui 8006' (ZH8006) and a japonica rice 'Wuyunjing 8' (WYJ8)...
January 3, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29285597/interspecific-and-intergeneric-hybridization-as-a-source-of-variation-for-wheat-grain-quality-improvement
#9
REVIEW
Juan B Alvarez, Carlos Guzmán
The hybridization events with wild relatives and old varieties are an alternative source for enlarging the wheat quality variability. This review describes these process and their effects on the technological and nutritional quality. Wheat quality and its end-uses are mainly based on variation in three traits: grain hardness, gluten quality and starch. In recent times, the importance of nutritional quality and health-related aspects has increased the range of these traits with the inclusion of other grain components such as vitamins, fibre and micronutrients...
December 28, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29264625/predictive-ability-of-genomic-selection-models-in-a-multi-population-perennial-ryegrass-training-set-using-genotyping-by-sequencing
#10
Marty J Faville, Siva Ganesh, Mingshu Cao, M Z Zulfi Jahufer, Timothy P Bilton, H Sydney Easton, Douglas L Ryan, Jason A K Trethewey, M Philip Rolston, Andrew G Griffiths, Roger Moraga, Casey Flay, Jana Schmidt, Rachel Tan, Brent A Barrett
Genomic prediction models for multi-year dry matter yield, via genotyping-by-sequencing in a composite training set, demonstrate potential for genetic gain improvement through within-half sibling family selection. Perennial ryegrass (Lolium perenne L.) is a key source of nutrition for ruminant livestock in temperate environments worldwide. Higher seasonal and annual yield of herbage dry matter (DMY) is a principal breeding objective but the historical realised rate of genetic gain for DMY is modest. Genomic selection was investigated as a tool to enhance the rate of genetic gain...
December 20, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29260268/computation-of-the-inverse-additive-relationship-matrix-for-autopolyploid-and-multiple-ploidy-populations
#11
Matthew G Hamilton, Richard J Kerr
Rules to generate the inverse additive relationship matrix (A -1 ) are defined to enable the adoption restricted maximum likelihood (REML) and best linear unbiased prediction (BLUP) in autopolyploid populations with multiple ploidy levels. Many important agronomic, horticultural, ornamental, forestry, and aquaculture species are autopolyploids. However, the adoption of restricted maximum likelihood (REML), for estimating co/variance components, and best linear unbiased prediction (BLUP), for predicting breeding values, has been hampered in autopolyploid breeding by the absence of an appropriate means of generating the inverse additive relationship matrix (A -1 )...
December 19, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29247258/fine-mapping-a-self-fertility-locus-in-perennial-ryegrass
#12
Javier Do Canto, Bruno Studer, Ursula Frei, Thomas Lübberstedt
A self-fertility locus was fine mapped to a 1.6 cM region on linkage group 5 in a perennial ryegrass population. This locus was the main determinant of pollen self-compatibility. In grasses, self-incompatibility (SI) is characterized by a two-loci gametophytic (S and Z) mechanism acting together in the recognition and inhibition of self-pollen. Mutations affecting the expression of SI have been reported in a few grass species. In perennial ryegrass (Lolium perenne L.), a mutation independent from S and Z, and mapping on linkage group 5 (LG 5), was previously reported to produce self-fertile plants...
December 15, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29247257/application-of-a-partitioning-procedure-based-on-rao-quadratic-entropy-index-to-characterize-the-temporal-evolution-of-in-situ-varietal-and-genetic-diversity-of-bread-wheat-in-france-over-the-period-1981-2006
#13
Rémi Perronne, Isabelle Goldringer
We present and highlight a partitioning procedure based on the Rao quadratic entropy index to assess temporal in situ inter-annual varietal and genetic changes of crop diversity. For decades, Western-European agroecosystems have undergone profound changes, among which a reduction of crop genetic diversity. These changes have been highlighted in numerous studies, but no unified partitioning procedure has been proposed to compute the inter-annual variability in both varietal and genetic diversity. To fill this gap, we tested, adjusted and applied a partitioning procedure based on the Rao quadratic entropy index that made possible to describe the different components of crop diversity as well as to account for the relative acreages of varieties...
December 15, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29234827/transcriptome-signatures-of-tomato-leaf-induced-by-phytophthora-infestans-and-functional-identification-of-transcription-factor-spwrky3
#14
Jun Cui, Pinsan Xu, Jun Meng, Jingbin Li, Ning Jiang, Yushi Luan
SpWRKY3 was identified as a resistance gene to Phytophthora infestans from Solanum pimpinellifolium L3708 and its transgenic tomato showed a significant resistance to P. infestans. This finding reveals the potential application of SpWRKY3 in future molecular breeding. Transcription factors (TFs) play crucial roles in the plant response to various pathogens. In this present study, we used comparative transcriptome analysis of tomatoes inoculated with and without Phytophthora infestans to identify 1103 differentially expressed genes...
December 12, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29224171/genetic-mapping-and-validation-of-the-loci-controlling-7s-%C3%AE-and-11s-a-type-storage-protein-subunits-in-soybean-glycine-max-l-merr
#15
Jeffrey D Boehm, Vi Nguyen, Rebecca M Tashiro, Dale Anderson, Chun Shi, Xiaoguang Wu, Lorna Woodrow, Kangfu Yu, Yuhai Cui, Zenglu Li
Four soybean storage protein subunit QTLs were mapped using bulked segregant analysis and an F2 population, which were validated with an F5 RIL population. The storage protein globulins β-conglycinin (7S subunit) and glycinin (11S subunits) can affect the quantity and quality of proteins found in soybean seeds and account for more than 70% of the total soybean protein. Manipulating the storage protein subunits to enhance soymeal nutrition and for desirable tofu manufacturing characteristics are two end-use quality goals in soybean breeding programs...
December 9, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29218378/efficiency-of-multi-trait-indirect-and-trait-assisted-genomic-selection-for-improvement-of-biomass-sorghum
#16
Samuel B Fernandes, Kaio O G Dias, Daniel F Ferreira, Patrick J Brown
We compare genomic selection methods that use correlated traits to help predict biomass yield in sorghum, and find that trait-assisted genomic selection performs best. Genomic selection (GS) is usually performed on a single trait, but correlated traits can also help predict a focal trait through indirect or multi-trait GS. In this study, we use a pre-breeding population of biomass sorghum to compare strategies that use correlated traits to improve prediction of biomass yield, the focal trait. Correlated traits include moisture, plant height measured at monthly intervals between planting and harvest, and the area under the growth progress curve...
December 7, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29218377/genetic-mapping-of-a-major-gene-in-triticale-conferring-resistance-to-bacterial-leaf-streak
#17
Aimin Wen, Malini Jayawardana, Jason Fiedler, Suraj Sapkota, Gongjun Shi, Zhao Peng, Sanzhen Liu, Frank F White, Adam J Bogdanove, Xuehui Li, Zhaohui Liu
A major gene conferring resistance to bacterial leaf streak was mapped to chromosome 5R in triticale. Bacterial leaf streak (BLS), caused by Xanthomonas translucens pv. undulosa (Xtu), is an important disease of wheat and triticale around the world. Although resistance to BLS is limited in wheat, several triticale accessions have high levels of resistance. To characterize the genetic basis of this resistance, we developed triticale mapping populations using a resistant accession (Siskiyou) and two susceptible accessions (UC38 and Villax St...
December 7, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29218376/genetic-dissection-and-validation-of-candidate-genes-for-flag-leaf-size-in-rice-oryza-sativa-l
#18
Xinxin Tang, Rong Gong, Wenqiang Sun, Chaopu Zhang, Sibin Yu
Two major loci with functional candidate genes were identified and validated affecting flag leaf size, which offer desirable genes to improve leaf architecture and photosynthetic capacity in rice. Leaf size is a major determinant of plant architecture and yield potential in crops. However, the genetic and molecular mechanisms regulating leaf size remain largely elusive. In this study, quantitative trait loci (QTLs) for flag leaf length and flag leaf width in rice were detected with high-density single nucleotide polymorphism genotyping of a chromosomal segment substitution line (CSSL) population, in which each line carries one or a few chromosomal segments from the japonica cultivar Nipponbare in a common background of the indica variety Zhenshan 97...
December 7, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29218375/genetic-analysis-of-multi-environmental-spring-wheat-trials-identifies-genomic-regions-for-locus-specific-trade-offs-for-grain-weight-and-grain-number
#19
Sivakumar Sukumaran, Marta Lopes, Susanne Dreisigacker, Matthew Reynolds
GWAS on multi-environment data identified genomic regions associated with trade-offs for grain weight and grain number. Grain yield (GY) can be dissected into its components thousand grain weight (TGW) and grain number (GN), but little has been achieved in assessing the trade-off between them in spring wheat. In the present study, the Wheat Association Mapping Initiative (WAMI) panel of 287 elite spring bread wheat lines was phenotyped for GY, GN, and TGW in ten environments across different wheat growing regions in Mexico, South Asia, and North Africa...
December 7, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29222636/identification-introgression-and-molecular-marker-genetic-analysis-and-selection-of-a-highly-effective-novel-oat-crown-rust-resistance-from-diploid-oat-avena-strigosa
#20
Howard W Rines, Marisa E Miller, Martin Carson, Shiaoman Chao, Tyler Tiede, Jochum Wiersma, Shahryar F Kianian
Oat crown rust is one of the most damaging diseases of oat. We identified a new source of resistance and developed KASP and TaqMan markers for selection in breeding programs. A new highly effective resistance to oat crown rust (Puccinia coronata f. sp. avenae) was identified in the diploid oat Avena strigosa PI 258731 and introgressed into hexaploid cultivated oat. Young plants with this resistance show moderate susceptibility, whereas older plant tissues and adult plants are resistant with no virulent isolates encountered in over 8 years of testing...
December 6, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
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