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Journal of Animal Breeding and Genetics

Christel Marie-Etancelin, Dominique Francois, Jean-Louis Weisbecker, Didier Marcon, Carole Moreno-Romieux, Frédéric Bouvier, Flavie Tortereau
Breeding strategies based on feed efficiency are now implemented in most animal species using residual feed intake (RFI) criteria. Although relevant, the correlated responses of feeding behaviour traits resulting from such selection on RFI are poorly documented. We report the estimated feeding behaviour at three time levels (visit, meal and day) and genetic parameters between the feeding behaviour traits and their links with RFI and its components. Feed intake, feeding duration at three time levels (per visit, meal and day), feeding rate, number of visits and time-between-visits were estimated for 951 Romane lambs fed via automatic concentrate feeders...
April 4, 2019: Journal of Animal Breeding and Genetics
Xiujin Li, Bo Jiang, Xibin Wang, Xiaohong Liu, Qin Zhang, Yaosheng Chen
The economic profitability of a boar station largely depends on semen quantity and quality traits. However, genetic analysis of semen traits has not yet been done in the boar population in China. In this study, we aimed to estimate genetic parameters for semen traits and the influence of seasons on these traits by using data of Duroc, Landrace and Yorkshire boars in South China. The following four semen traits were analysed: semen volume (ml; VOL), sperm concentration (106 /ml; DEN), sperm motility (MOT) and percentage of abnormal sperm (ABN)...
March 20, 2019: Journal of Animal Breeding and Genetics
Gopal R Gowane, Arun Kumar, Chanda Nimbkar
Animal breeding in India has a long and chequered history. High pressure on agricultural land and increasing human population opened a new opportunity for the livestock and poultry sector as a promising food industry. Productivity of livestock in India is low due to less coverage of livestock under structured breeding programmes, inadequate nutrition and its entanglement with several socio-economic issues. A bottom-up approach to breeding policy formulation addressing local needs is required with assured flow of investments...
March 15, 2019: Journal of Animal Breeding and Genetics
Sarita Zhe Ying Guy, Li Li, Peter Campbell Thomson, Susanne Hermesch
Contemporary group (CG) estimates of different phenotypes have not been widely explored for pigs. The objective of this study was to extend the traits used to derive environmental descriptors of the growing pig, to include CG estimates of early growth between birth and start of feed intake test (EADG), growth during feed intake test (TADG), lifetime growth (ADG), daily feed intake (DFI), backfat (BF) and muscle depth (MD). Pedigree and performance records (n = 7,746) from a commercial Australian piggery were used to derive environmental descriptors based on CG estimates of these six traits...
March 15, 2019: Journal of Animal Breeding and Genetics
Jiuxiu Ji, Guorong Yan, Dong Chen, Shijun Xiao, Jun Gao, Zhiyan Zhang
The average daily gain (ADG) and body weight (BW) are very important traits for breeding programs and for the meat production industry, which have attracted many researchers to delineate the genetic architecture behind these traits. In the present study, single- and multi-trait genome-wide association studies (GWAS) were performed between imputed whole-genome sequence data and the traits of the ADG and BW at different stages in a large-scale White Duroc × Erhualian F2 population. A bioinformatics annotation analysis was used to assist in the identification of candidate genes that are associated with these traits...
March 14, 2019: Journal of Animal Breeding and Genetics
Teruaki Tozaki, Takeshi Miyake, Mio Kikuchi, Hironaga Kakoi, Kei-Ichi Hirota, Kanichi Kusano, Yuhiro Ishikawa, Motoi Nomura, Asuka Kushiro, Shun-Ichi Nagata
Thoroughbred racehorses are produced by mating small numbers of Arabian stallions and native British mares, and have been improved by selection of horseracing performance for about 300 years. While these improvements led to good performance as racehorses, they exposed horses to numerous medical disorders, aggravated by extensive exercise. Fractures are frequent medical disorders in Thoroughbred racehorses. In this study, fracture heritability was estimated using 3,927 Japanese Thoroughbred racehorses to elucidate the risk of racehorse fractures...
February 21, 2019: Journal of Animal Breeding and Genetics
Kan Okamoto, Kazato Oishi, Ryoichi Nakamura, Atsuko Abe, Keiichi Inoue, Hajime Kumagai, Hiroyuki Hirooka
Variances caused by the differential expression of paternally and maternally imprinted genes controlling carcass traits in Japanese Black cattle were estimated in this study. Data on marbling score (BMS), carcass weight, rib thickness, rib-eye area (REA) and subcutaneous fat thickness (SFT) were collected from a total of 13,115 feedlot steers and heifers in a commercial population. A sire-maternal grandsire model was used to analyse the data, and then, imprinting parameters were derived by replacing the genetic effect of the dam with the effect of the maternal grandsire in the imprinting model to calculate the genetic parameter estimates...
February 19, 2019: Journal of Animal Breeding and Genetics
Keyvan Karami, Saeed Zerehdaran, Ali Javadmanesh, Mohammad Mahdi Shariati, Hossien Fallahi
Imprinted genes display biased expression of paternal and maternal alleles in mammals. They are marked through epigenetic process during gametogenesis. Characterization of imprinted genes has expanded our understanding of the regulation and function of genes. In the current study, 22 experimentally validated imprinted genes in bovine (Bos Taurus) were analysed. Several supervised machine learning algorithms and attribute weighting methods were used to find characteristics of different types of imprinted genes and suggest a classification method for finding maternally and paternally expressed genes in bovine...
January 29, 2019: Journal of Animal Breeding and Genetics
Tom Granleese, Samuel A Clark, Julius H J van der Werf
Benefits of genomic selection (GS) in livestock breeding operations are well known particularly where traits are sex-limited, hard to measure, have a low heritability and/or measured later in life. Sheep and beef breeders have a higher cost:benefit ratio for GS compared to dairy. Therefore, strategies for genotyping selection candidates should be explored to maximize the economic benefit of GS. The aim of the paper was to investigate, via simulation, the additional genetic gain achieved by selecting proportions of male selection candidates to be genotyped via truncation selection...
January 28, 2019: Journal of Animal Breeding and Genetics
Hervé Garreau, Julien Ruesche, Hélène Gilbert, Elodie Balmisse, Florence Benitez, François Richard, Ingrid David, Laurence Drouilhet, Olivier Zemb
The aim of this experiment was to evaluate the significance of neonatal environment on feed efficiency. For that purpose, rabbits from a line selected for residual feed intake (RFI) during 10 generations (G10 kits) were cross-fostered with non-selected control does (i.e., G0 line), and reciprocally. In parallel, sibs were fostered by mothers from their original line. Nine hundred animals were raised in individual (N = 456) or collective (N = 320) cages. Traits analysed in this study were body weight at 32 days and at 63 days, average daily gain (ADG), feed intake between weaning and 63 days (FI), feed conversion ratio (FCR) and RFI...
January 28, 2019: Journal of Animal Breeding and Genetics
Hiroyuki Hirooka
No abstract text is available yet for this article.
May 2019: Journal of Animal Breeding and Genetics
(no author information available yet)
No abstract text is available yet for this article.
March 2019: Journal of Animal Breeding and Genetics
Jordi Estellé
No abstract text is available yet for this article.
March 2019: Journal of Animal Breeding and Genetics
Lars Rönnegård
No abstract text is available yet for this article.
March 2019: Journal of Animal Breeding and Genetics
Daniel Gianola, Rohan L Fernando, Dorian J Garrick
A curious result from mixed linear models applied to genome-wide association studies was expanded. In particular, a model in which one or more markers are considered as fixed but are allowed to contribute to the covariance structure by treating such markers as random as well was examined. The best linear unbiased estimator of marker effects is invariant with respect to whether those markers are employed in constructing a genomic relationship matrix or are ignored, provided marker effects are uncorrelated with those not being tested...
January 7, 2019: Journal of Animal Breeding and Genetics
Asko Mäki-Tanila, Leah Webster
No abstract text is available yet for this article.
January 2019: Journal of Animal Breeding and Genetics
Rosiane P Silva, Mariana P Berton, Laís Grigoletto, Felipe E Carvalho, Rafael M O Silva, Elisa Peripolli, Letícia M Castro, José Bento S Ferraz, Joanir P Eler, Raysildo B Lôbo, Fernando Baldi
The aim of this study was to estimate genetic parameters and identify genomic regions associated with carcass traits obtained by ultrasound and visual scores in Nellore cattle. Data from ~66,000 animals from the National Association of Breeders and Researchers (ANCP) were used. The variance components for backfat thickness, rump fat thickness and Longissimus muscle area (LMA) were estimated considering a linear model whereas a threshold model for body structure (BS), finishing precocity (FP) and musculature (MS) traits...
December 27, 2018: Journal of Animal Breeding and Genetics
Tom Granleese, Samuel A Clark, Brian P Kinghorn, Julius H J van der Werf
Female reproductive technologies such as multiple ovulation and embryo transfer (MOET) and juvenile in vitro fertilization and embryo transfer (JIVET) have been shown to accelerate genetic gain by increasing selection intensity and decreasing generation interval. Genomic selection (GS) increases the accuracy of selection of young candidates which can further accelerate genetic gain. Optimal contribution selection (OCS) is an effective method of keeping the rate of inbreeding at a sustainable level while increasing genetic merit...
December 26, 2018: Journal of Animal Breeding and Genetics
Ewa Sell-Kubiak, Egbert Frank Knol, Herman Arend Mulder
This study aimed to analyse genetic background of variation in reproductive performance between parities of a sow and to investigate selection strategies to change the "parity curve". Total number born (TNB) recorded in Large White sows was provided by Topigs Norsvin. Analysis with basic (BM) and random regression (RRM) models was done in ASReml 4.1. The BM included only a fixed "parity curve", while RRM included 3rd order polynomials for additive genetic and permanent sow effects. Parameters from RRM were used in simulations in SelAction 2...
December 26, 2018: Journal of Animal Breeding and Genetics
Bruno C Perez, Julio C C Balieiro, Roberto Carvalheiro, Fabio Tirelo, Gerson A Oliveira Junior, Juliana M Dementshuk, Joanir P Eler, José B S Ferraz, Ricardo V Ventura
The objective of the present study was to investigate the impact of considering population structure in cow genotyping strategies over the accuracy and bias of genomic predictions. A small dairy cattle population was simulated to address these objectives. Based on four main traditional designs (random, top-yield, extreme-yield and top-accuracy cows), different numbers (1,000; 2,000 and 5,000) of cows were sampled and included in the reference population. Traditional designs were replicated considering or not population structure and compared among and with a reference population containing only bulls...
December 18, 2018: Journal of Animal Breeding and Genetics
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