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Journal of Animal Breeding and Genetics, Zeitschrift Für Tierzüchtung und Züchtungsbiologie

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https://www.readbyqxmd.com/read/30417949/unravelling-the-genetic-loci-for-growth-and-carcass-traits-in-chinese-bamaxiang-pigs-based-on-a-1-4-million-snp-array
#1
Huanfa Gong, Shijun Xiao, Wanbo Li, Tao Huang, Xiaochang Huang, Guorong Yan, Yizhong Huang, Hengqing Qiu, Kai Jiang, Xiaopeng Wang, Hui Zhang, Jianhong Tang, Lin Li, Yiping Li, Chenbin Wang, Chuanmin Qiao, Jun Ren, Lusheng Huang, Bin Yang
Bamaxiang pig is from Guangxi province in China, characterized by its small body size and two-end black coat colour. It is an important indigenous breed for local pork market and excellent animal model for biomedical research. In this study, we performed genomewide association studies (GWAS) on 43 growth and carcass traits in 315 purebred Bamaxiang pigs based on a 1.4 million SNP array. We observed considerable phenotypic variability in the growth and carcass traits in the Bamaxiang pigs. The corresponding SNP based heritability varied greatly across the 43 traits and ranged from 9...
November 12, 2018: Journal of Animal Breeding and Genetics, Zeitschrift Für Tierzüchtung und Züchtungsbiologie
https://www.readbyqxmd.com/read/30334292/variation-in-the-actual-preferences-for-ai-bull-traits-among-finnish-dairy-herds
#2
Elina Paakala, Daniel Martín-Collado, Asko Mäki-Tanila, Jarmo Juga
Changing production circumstances, a wide range of traits and the international bull market enable dairy farmers to make increasingly specific choices concerning artificial insemination (AI) bulls. Finland is part of the joint Nordic dairy cattle breeding programme where in addition to yield, high emphasis is given to health, fertility, conformation and longevity. The aims of our study were (a) to investigate whether Finnish dairy farmers differ in their selection preferences for AI bull traits and can be clustered into herd groups, (b) to determine whether AI bull selection in different herd groups is in line with the Nordic Total Merit index (NTM) and (c) to analyse how the herd groups are related to herd characteristics...
October 17, 2018: Journal of Animal Breeding and Genetics, Zeitschrift Für Tierzüchtung und Züchtungsbiologie
https://www.readbyqxmd.com/read/30334289/complexity-of-animal-breeding-choice-making
#3
Daniel Martin-Collado, Timothy J Byrne, Clara Diaz, Peter R Amer
The last decades of developments in animal breeding, genetics, genomics and data recording technologies have allowed the evaluation of larger numbers of animal and animal traits than ever before. This should help make animal breeding choices more informed, but it also makes them far more complex. This complexity may be overwhelming farmers, thus compromising realization of potential genetic gain in livestock industries. However, the effect of complexity of animal breeding choices on farmers' selection of animals has received very little theoretical consideration to date...
October 17, 2018: Journal of Animal Breeding and Genetics, Zeitschrift Für Tierzüchtung und Züchtungsbiologie
https://www.readbyqxmd.com/read/30298946/genotype-imputation-accuracy-in-multiple-equine-breeds-from-medium-to-high-density-genotypes
#4
Marjorie Chassier, Eric Barrey, Céline Robert, Arnaud Duluard, Sophie Danvy, Anne Ricard
Genotype imputation is now a key component of genomic analyses as it increases the density of available genotypes within a population. However, many factors can influence imputation accuracy. The aim of this study was to assess and compare the accuracy of imputation of high-density genotypes (Affymetrix Axiom Equine genotyping array, 670,806 SNPs) from two moderate-density genotypes (Illumina Equine SNP50 BeadChip, 54,602 SNPs and Illumina Equine SNP70 BeadChip, 65,157 SNPs), using single-breed or multiple-breed reference sets...
October 9, 2018: Journal of Animal Breeding and Genetics, Zeitschrift Für Tierzüchtung und Züchtungsbiologie
https://www.readbyqxmd.com/read/30136312/exploring-genetic-diversity-in-an-italian-horse-native-breed-to-develop-strategies-for-preservation-and-management
#5
Michela Ablondi, Matteo Vasini, Valentino Beretti, Paola Superchi, Alberto Sabbioni
Genetic diversity is a key factor for both adaptation and response to selection. The loss of genetic diversity causes a decrease in individual fitness, and it has a dramatically negative effect on population lifespan in the long term. This study aimed at exploring the genetic diversity at pedigree level of the Bardigiano horse breed, which is a native breed from Italy shaped for living in rural areas. In 1977, the Bardigiano studbook was founded to preserve the breed and for improving its use for riding and draft purposes...
August 22, 2018: Journal of Animal Breeding and Genetics, Zeitschrift Für Tierzüchtung und Züchtungsbiologie
https://www.readbyqxmd.com/read/30411418/y-chromosome-haplotype-analysis-revealing-multiple-paternal-origins-in-swamp-buffaloes-of-china-and-southeast-asia
#6
Shaoqiang Wang, Xiaoting Xia, Tao Zhang, Ting Sun, Ruihua Dang, Yongzhen Huang, Xianyong Lan, Hong Chen, Chuzhao Lei
To further probe into the paternal origins and domestication area of swamp buffaloes, we examined Y-chromosome diversity of 482 bulls representing 22 populations from China and Southeast Asia. A total of 40 bovine Y-chromosome-specific microsatellite (Y-STR) markers were screened in this study. The results showed that seven Y-STR markers (UMN2405, UMN0504, UMN0103, UMN1307, BC1.2, UMN0304 and INRA008) were specific and polymorphic in male swamp buffaloes, which can define 9 Y-haplotypes corresponding to four Y-haplogroups (Y1, Y2, Y3 and Y4)...
October 2018: Journal of Animal Breeding and Genetics, Zeitschrift Für Tierzüchtung und Züchtungsbiologie
https://www.readbyqxmd.com/read/30411417/the-fundamental-theorem-of-natural-selection
#7
EDITORIAL
Alan Grafen
No abstract text is available yet for this article.
October 2018: Journal of Animal Breeding and Genetics, Zeitschrift Für Tierzüchtung und Züchtungsbiologie
https://www.readbyqxmd.com/read/30411416/fisher-s-quantitative-genetic-model-and-the-molecular-genetics-of-multifactorial-traits
#8
EDITORIAL
Leif Andersson
No abstract text is available yet for this article.
October 2018: Journal of Animal Breeding and Genetics, Zeitschrift Für Tierzüchtung und Züchtungsbiologie
https://www.readbyqxmd.com/read/30411415/joint-breeding-value-evaluation-for-fertility-in-finnish-and-norwegian-blue-foxes
#9
Riitta M Kempe, Ismo Strandén
We developed a multiple-trait animal model for blue fox fertility evaluation and estimated genetic parameters simultaneously for seven traits: first three litter sizes (LS), pregnancy rate (PREG), whelping success (WHELP), grading size (gSI) and fur quality (gQU). Grading size and quality were included into the new multiple-trait model as correlated traits. Litter size of the first parity had the highest unfavourable genetic correlations with gSI (-0.57) and gQU (-0.56). Thus, selection for higher gSI and gQU slows down the genetic gain in fertility traits...
October 2018: Journal of Animal Breeding and Genetics, Zeitschrift Für Tierzüchtung und Züchtungsbiologie
https://www.readbyqxmd.com/read/30206999/r-a-fisher-and-the-development-of-statistics
#10
EDITORIAL
Leo Dempfle
No abstract text is available yet for this article.
October 2018: Journal of Animal Breeding and Genetics, Zeitschrift Für Tierzüchtung und Züchtungsbiologie
https://www.readbyqxmd.com/read/30206998/from-1949-to-2018-r-a-fisher-s-theory-of-junctions
#11
EDITORIAL
Elizabeth A Thompson
No abstract text is available yet for this article.
October 2018: Journal of Animal Breeding and Genetics, Zeitschrift Für Tierzüchtung und Züchtungsbiologie
https://www.readbyqxmd.com/read/30112802/single-step-genomic-evaluation-for-female-fertility-in-nordic-red-dairy-cattle
#12
Kaarina Matilainen, Ismo Strandén, Gert Pedersen Aamand, Esa A Mäntysaari
Joint Nordic (Denmark, Finland, Sweden) genetic evaluation of female fertility is currently based on the multiple trait multilactation animal model (BLUP). Here, single step genomic model (ssGBLUP) was applied for the Nordic Red dairy cattle fertility evaluation. The 11 traits comprised of nonreturn rate and days from first to last insemination in heifers and first three parities, and days from calving to first insemination in the first three parities. Traits had low heritabilities (0.015-0.04), but moderately high genetic correlations between the parities (0...
October 2018: Journal of Animal Breeding and Genetics, Zeitschrift Für Tierzüchtung und Züchtungsbiologie
https://www.readbyqxmd.com/read/30105811/genetic-evaluation-of-atlantic-salmon-for-growth-traits-incorporating-snp-markers
#13
Lawrence R Schaeffer, Keng Pee Ang, Jake A K Elliott, Marine Herlin, Frank Powell, Elizabeth Grace Boulding
Genetic evaluations of individual fish were calculated for growth traits in North American Atlantic salmon with and without inclusion of genetic markers. The number of SNP markers was reduced to 6,000 and further to 270 in order to reduce the problem of overparameterization. SNP genotypes were predicted for all ungenotyped animals in the pedigree. Analysis of traits used a model with polygenic effects and SNP markers together. Polygenic effects refer to the additive genetic effects that remain after accounting for SNP genotypes...
October 2018: Journal of Animal Breeding and Genetics, Zeitschrift Für Tierzüchtung und Züchtungsbiologie
https://www.readbyqxmd.com/read/30033566/expected-consequences-of-including-methane-footprint-into-the-breeding-goals-in-beef-cattle-a-spanish-blonde-d-aquitaine-population-as-a-case-of-study
#14
Javier López-Paredes, Rafael Alenda, Oscar González-Recio
This study evaluates two potential scenarios for including methane (CH4 ) emissions in the breeding objectives of beef cattle, using the Spanish population of Blonde d'Aquitaine as a case of study. First, CH4 emissions were included as a cost using a shadow carbon price of 1.22€/CH4 kg (0.044€/CO2 kg) (carbon tax scenario). In the other scenario, a CH4 quota was applied, optimizing emissions per unit of product. The current production system was used as benchmark scenario (Scenario 1). The economic value of CH4 was calculated under all scenarios using a bioeconomic model that translated the production system into a mathematical function...
October 2018: Journal of Animal Breeding and Genetics, Zeitschrift Für Tierzüchtung und Züchtungsbiologie
https://www.readbyqxmd.com/read/29993145/sensitivity-of-the-breeding-values-for-growth-rate-and-worm-egg-count-to-environmental-worm-burden-in-australian-merino-sheep
#15
Baukje L Hollema, Piter Bijma, Julius H J van der Werf
The objective of this study was to explore the sensitivity of breeding values for growth rate and worm egg count (WEC, cube root transformed) to environmental worm burden, measured as the average WEC for each contemporary group (CGWEC). Growth rate and WEC were measured on 7,818 naturally infected Merino lambs in eight flocks across Australia, linked through common use of AI sires. Through bivariate analysis, genetic correlations of 0.55 ± 0.23 and 0.30 ± 0.16 were found for growth rate and WEC between low and high CGWEC, respectively...
October 2018: Journal of Animal Breeding and Genetics, Zeitschrift Für Tierzüchtung und Züchtungsbiologie
https://www.readbyqxmd.com/read/29993141/feed-and-reproductive-efficiency-differences-between-divergently-selected-lines-for-birthweight-environmental-variability-in-mice
#16
Nora Formoso-Rafferty, Miguel de la Flor, Juan Pablo Gutiérrez, Isabel Cervantes
Sustainability has come to play an important role in agricultural production. A way to combine efficiency with sustainability might be by searching for robust animals that can be selected for the homogeneity of certain traits. Furthermore, the optimization of feed efficiency is one of the challenges to improve livestock genetics programmes, but this might compromise reproductive efficiency. Animals from two divergent mouse lines, regarding variability of birthweight, were used to check whether homogeneity was also related to both feed and reproductive efficiency...
October 2018: Journal of Animal Breeding and Genetics, Zeitschrift Für Tierzüchtung und Züchtungsbiologie
https://www.readbyqxmd.com/read/30117205/suitability-of-existing-commercial-single-nucleotide-polymorphism-chips-for-genomic-studies-in-bos-indicus-cattle-breeds-and-their-bos-taurus-crosses
#17
Nilesh Nayee, Goutam Sahana, Swapnil Gajjar, Ananthasayanam Sudhakar, Kamlesh Trivedi, Mogens Sandø Lund, Bernt Guldbrandtsen
Bos indicus cattle breeds are genetically distinct from Bos taurus breeds. We examined the performance of three SNP arrays, the Illumina BovineHD BeadChip (777k; Illumina Inc.), the Illumina BovineSNP50 BeadChip (50k) and the GeneSeek 70k Indicus chip (75Ki; GeneSeek) in four B. indicus breeds (Gir, Kankrej, Sahiwal and Red Sindhi) and their B. taurus crosses, along with two B. taurus breeds, Holstein and Jersey. More SNPs on both Illumina SNP chips were monomorphic in B. indicus breeds (average 20.3%-29...
August 16, 2018: Journal of Animal Breeding and Genetics, Zeitschrift Für Tierzüchtung und Züchtungsbiologie
https://www.readbyqxmd.com/read/30043458/genetic-structure-and-connectivity-analysis-in-a-large-domestic-livestock-meta-population-the-case-of-the-pura-raza-espa%C3%A3-ol-horses
#18
Marina Solé, Mercedes Valera, Jesús Fernández
The Pura Raza Español (PRE) is an autochthonous Spanish horse population distributed in 65 countries and managed by a single association. Since 1960s, breeding animals have been steadily exported to other countries to establish local subpopulations. We analysed the genetic structure of a PRE horse meta-population (MP) of 215,500 animals from countries with at least 80 active animals (27 countries comprising 77% of the total animals in the complete pedigree). Genotypes from active animals (59% of the total animals in the complete pedigree) were also studied...
July 24, 2018: Journal of Animal Breeding and Genetics, Zeitschrift Für Tierzüchtung und Züchtungsbiologie
https://www.readbyqxmd.com/read/29926987/growth-patterns-for-three-generations-of-an-intercross-between-red-junglefowl-and-chickens-selected-for-low-body-weight
#19
Dez-Ann Antoinette Therese Sutherland, Christa Ferst Honaker, Ben Dorshorst, Leif Andersson, I Lehr Brisbin, Paul B Siegel
Growth is a complex and dynamic process that may be measured at a specific point or over a period of time. Compared was the growth of male and female chickens over a three-generation period. Involved were red junglefowl (RJF; Gallus gallus), a line of White Plymouth Rock chickens (LWS; Gallus gallus domesticus) selected for low body weight, and their reciprocal F1 and F2 crosses. In both sexes, Gompertz's description of growth showed that RJF had significantly lower asymptotes, earlier inflection points, and faster growth rates than LWS...
June 21, 2018: Journal of Animal Breeding and Genetics, Zeitschrift Für Tierzüchtung und Züchtungsbiologie
https://www.readbyqxmd.com/read/29882604/the-impact-of-truncating-data-on-the-predictive-ability-for-single-step-genomic-best-linear-unbiased-prediction
#20
Jeremy T Howard, Tom A Rathje, Caitlyn E Bruns, Danielle F Wilson-Wells, Stephen D Kachman, Matthew L Spangler
Simulated and swine industry data sets were utilized to assess the impact of removing older data on the predictive ability of selection candidate estimated breeding values (EBV) when using single-step genomic best linear unbiased prediction (ssGBLUP). Simulated data included thirty replicates designed to mimic the structure of swine data sets. For the simulated data, varying amounts of data were truncated based on the number of ancestral generations back from the selection candidates. The swine data sets consisted of phenotypic and genotypic records for three traits across two breeds on animals born from 2003 to 2017...
June 8, 2018: Journal of Animal Breeding and Genetics, Zeitschrift Für Tierzüchtung und Züchtungsbiologie
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