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Journal articles on the topic 'Estimated breeding value (EBV)'

Author: Grafiati

Published: 4 June 2021

Last updated: 5 February 2022

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1

Hanusová, L., A. Míková, L. Večerek, et al. "Effect of DGAT1 polymorphisms on the estimated breeding values of Czech Simmental sires." Czech Journal of Animal Science 59, No. 8 (2014): 365–73. http://dx.doi.org/10.17221/7587-cjas.

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The aim was to evaluate the effect of polymorphisms in the promoter and in the coding region of the DGAT1 gene on the estimated breeding values (EBV) of Czech Simmental sires. The K232A polymorphism (n = 191) in the coding region was genotyped by PCR/RFLP, and the KU and SA polymorphisms in the promoter (n = 203) were identified in an automatic sequencer. In the K232A polymorphism, the frequency of the genotype AA (Alanine) was greater than that of the genotype KA, the homozygous genotype KK (Lysine) was not found. Similarly, the allele A predominated over the K allele (0.945 and 0.055). The E

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2

Karimi, Zahra, Brian Sullivan, and Mohsen Jafarikia. "45 A permutation test for validation of genomic estimated breeding values." Journal of Animal Science 98, Supplement_4 (2020): 8–9. http://dx.doi.org/10.1093/jas/skaa278.016.

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Abstract Previous studies have shown that the accuracy of Genomic Estimated Breeding Value (GEBV) as a predictor of future performance is higher than the traditional Estimated Breeding Value (EBV). The purpose of this study was to estimate the potential advantage of selection on GEBV for litter size (LS) compared to selection on EBV in the Canadian swine dam line breeds. The study included 236 Landrace and 210 Yorkshire gilts born in 2017 which had their first farrowing after 2017. GEBV and EBV for LS were calculated with data that was available at the end of 2017 (GEBV2017 and EBV2017, respec

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3

Nwogwugwu, Chiemela Peter, Yeongkuk Kim, Yun Ji Chung, et al. "Effect of errors in pedigree on the accuracy of estimated breeding value for carcass traits in Korean Hanwoo cattle." Asian-Australasian Journal of Animal Sciences 33, no. 7 (2020): 1057–67. http://dx.doi.org/10.5713/ajas.19.0021.

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Objective: This study evaluated the effect of pedigree errors (PEs) on the accuracy of estimated breeding value (EBV) and genetic gain for carcass traits in Korean Hanwoo cattle.Methods: The raw data set was based on the pedigree records of Korean Hanwoo cattle. The animals’ information was obtained using Hanwoo registration records from Korean animal improvement association database. The record comprised of 46,704 animals, where the number of the sires used was 1,298 and the dams were 38,366 animals. The traits considered were carcass weight (CWT), eye muscle area (EMA), back fat thickness (B

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4

Lee, Yun-Mi, Chang-Gwon Dang, Mohammad Z. Alam, et al. "The effectiveness of genomic selection for milk production traits of Holstein dairy cattle." Asian-Australasian Journal of Animal Sciences 33, no. 3 (2020): 382–89. http://dx.doi.org/10.5713/ajas.19.0546.

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Objective: This study was conducted to test the efficiency of genomic selection for milk production traits in a Korean Holstein cattle population.Methods: A total of 506,481 milk production records from 293,855 animals (2,090 heads with single nucleotide polymorphism information) were used to estimate breeding value by single step best linear unbiased prediction.Results: The heritability estimates for milk, fat, and protein yields in the first parity were 0.28, 0.26, and 0.23, respectively. As the parity increased, the heritability decreased for all milk production traits. The estimated genera

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5

KEMP, R. A., and J. W. WILTON. "THE EFFECT OF DIFFERENT NUMERATOR RELATIONSHIP MATRICES ON BREEDING VALUES ESTIMATED FROM MULTIPLE TRAIT BLUP." Canadian Journal of Animal Science 67, no. 1 (1987): 201–4. http://dx.doi.org/10.4141/cjas87-022.

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A numerator relationship matrix (Ac) due to sires and dams was compared with a numerator relationship matrix (Ai) due to sires and maternal grandsires in a multiple-trait-reduced animal model (MT-RAM). Best linear unbiased predictors of estimated breeding values (EBV) for 200-d weight (WW) and postweaning gain (PG) (gain from 200 to 365 d of age) were estimated from data simulating a beef cattle population. As expected, mean EBV and bias (EBV-BV) for both traits were not significantly affected by different relationship matrices. The mean variances of EBV with Ac were larger than those with Ai

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6

Sender, G., K. G. A. Hameid, A. Korwin-Kossakowska, and M. Sobczynska. "Association of the <i>BoLA-DRB3</i> alleles with estimated breeding value for somatic cell count in Polish dairy cattle." Archives Animal Breeding 51, no. 2 (2008): 111–19. http://dx.doi.org/10.5194/aab-51-111-2008.

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Abstract. Introducing resistance to mastitis into breeding programmes for dairy cattle seems to be one of the possible methods for limiting the increasing number of mastitis cases. Looking for candidate genes for genetic markers is one of the strategies. The BoLA–DRB3 alleles have considerable promise as potential mastitis marker. The objective of the study was to evaluate relationships between two BoLA–DRB3 alleles (BoLA–DRB3.2*16 and BoLA-DRB3.2*23) and estimated breeding value (EBV) for somatic cell count (SCC) in Polish dairy cattle. A total of 525 Polish Holstein cows in two experimental

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7

Bentley, Kelsey, Andrew R. Weaver, Joan M. Burke, et al. "158 The effect of sire fecal egg count estimated breeding value on antibody production of grazing Katahdin lambs." Journal of Animal Science 98, Supplement_2 (2020): 70. http://dx.doi.org/10.1093/jas/skz397.163.

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Abstract Over the past two years of mating high (Hi) or low (Lo) fecal egg count (FEC) EBV Katahdin rams randomly mated to Katahdin ewes, reduced FEC in lambs has been the hallmark trait observable at weaning. Upon additional analysis, death loss in lambs also segregated with sire FEC EBV; whereas, HiFEC-sired lambs had a death loss of 29.9% in 2018 and 14.5% in 2019. Yet, LoFEC-sired lambs had a death loss of 10% in both years. Increased death loss in 2018 may have been due to an outbreak of Clostridium perfringens Type-A and as a result lambs in 2019 were vaccinated for Clostridium type A. R

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8

Udeh, I. "Estimation of breeding value for bodyweight of grasscutters." Nigerian Journal of Animal Production 48, no. 2 (2021): 1–5. http://dx.doi.org/10.51791/njap.v48i2.2934.

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Animal breeders are interested in the genetic worth or total genetic merit of an animal for a given trait. The value of an animal in a breeding program for a particular trait is called the breeding value. The aim of this study was to predict the breeding values for bodyweight of grasscutters at 4, 6 and 8 months of age using univariate animal model. Four families of grasscutters with five grasscutters per family were used for the study. Families 3 and 4 had higher bodyweight at 4 and 6 months compared with families 1 and 2. Family 4 had the highest bodyweight at 8 month and family 2 had the le

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9

Uimari, Pekka, and Esa A. Mäntysaari. "Relationship between bull dam herd characteristics and bias in estimated breeding value of bull." Agricultural and Food Science 4, no. 5-6 (1995): 463–72. http://dx.doi.org/10.23986/afsci.72622.

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The objective of the study was to relate estimated breeding values (EBVs) of the parents’ 305-days protein production and the bull dam herd-year characteristics to the empirical bias in pedigree indices (difference between the pedigree index and the final proof) of young bulls. Two animal model evaluations were carried out; one included records up to 1990 and the other up to spring 1992. The final data set included 242 bulls with pedigree indices, final proofs, parents’ EBVs, production and herd information (the size, the average production and the intraherd standard deviation) of the dams. Th

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10

Allingham, P. G., G. E. Gardner, M. Taylor, R. S. Hegarty, and G. S. Harper. "Effects of sire genotype and plane of nutrition on fascicular structure of M. longissimus thoracis et lumborum and its effect on eating quality." Australian Journal of Agricultural Research 57, no. 6 (2006): 641. http://dx.doi.org/10.1071/ar04319.

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The purpose of this study was to determine if estimated breeding value (EBV) of an animal’s sire and or the animal’s nutrition affected the structure of its M. longissimus thoracis et lumborum (LL) and, hence, the eating quality of meat derived from its carcass. Lambs were chosen based on the EBV of their sires in terms of post-weaning live weight (PWWT), post weaning fat at the C-site (PFAT), and post-weaning eye muscle depth (PEMD). Morphometric techniques were used to characterise muscle structure in terms of the distribution of intramuscular connective tissue; the variables together are ca

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11

Salvian, Mayara, Gerson Barreto Mourão, Gabriel Costa Monteiro Moreira, Mônica Corrêa Ledur, Luiz Lehmann Coutinho, and Matthew L. Spangler. "60 Re-ranking of estimated breeding values using different panel densities with ssGBLUP in broiler chickens." Journal of Animal Science 97, Supplement_2 (2019): 36–37. http://dx.doi.org/10.1093/jas/skz122.067.

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Abstract The aim of this study was to compare the rank of estimated breeding values (EBV) for organs (heart, liver, lungs and gizzard) and carcass (breast, thigh and drumstick) traits using pedigree-based BLUP (PBLUP) and single-step genomic BLUP (ssGBLUP) models. A total of 1,453 chickens (703 males and 750 females) from a paternal broiler (TT) reference population belonging to the Poultry Breeding Program from Embrapa Swine and Poultry were genotyped with the Axiom® Genome-Wide Chicken Genotyping Array (Affymetrix) 600K SNP panel. Samples with a call rate lower than 90% were removed. A SNP q

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12

Luan, Tu, John A. Woolliams, Sigbjørn Lien, Matthew Kent, Morten Svendsen, and Theo H. E. Meuwissen. "The Accuracy of Genomic Selection in Norwegian Red Cattle Assessed by Cross-Validation." Genetics 183, no. 3 (2009): 1119–26. http://dx.doi.org/10.1534/genetics.109.107391.

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Genomic Selection (GS) is a newly developed tool for the estimation of breeding values for quantitative traits through the use of dense markers covering the whole genome. For a successful application of GS, accuracy of the prediction of genomewide breeding value (GW-EBV) is a key issue to consider. Here we investigated the accuracy and possible bias of GW-EBV prediction, using real bovine SNP genotyping (18,991 SNPs) and phenotypic data of 500 Norwegian Red bulls. The study was performed on milk yield, fat yield, protein yield, first lactation mastitis traits, and calving ease. Three methods,

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Jalil, MA, S. Akther, MP Choudhury, and MA Habib. "Estimation of genetic parameters and prediction of breeding values for some economic traits of Black Bengal Goat under farming condition." Bangladesh Journal of Livestock Research 20, no. 1-2 (2020): 8–17. http://dx.doi.org/10.3329/bjlr.v20i1-2.47013.

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The study was undertaken to evaluate the genetic progress of Black Bengal Goat (BBG) by estimating genetic parameters viz. heritability and breeding values for economically important productive and reproductive traits (birth weight, weight at 3, 6, 9 & 12 months, daily milk yield, lactation length, total milk yield and litter size of BBG goat population). Variance and co-variance components were analyzed applying Residual Maximum Likelihood (REML) approach by VCE 4.2.5 computer package. The heritability (h2) of birth weight was estimated as 0.2, which was low. The heritability estimates fo

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Putra, WPB, M. Sumadi, T. Hartatik, and H. Saumar. "Evaluation of growth traits of Aceh cattle at the breeding station in Indrapuri District of Indonesia." Bangladesh Journal of Animal Science 44, no. 2 (2015): 85–91. http://dx.doi.org/10.3329/bjas.v44i2.26006.

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The present study was conducted using records on four breeding bulls maintained at the Indrapuris Breeding and Forages Center (IBFC) of Aceh Cattle, Indrapuri district, Indonesia and 52 of their progeny born from 2010 to 2014 through natural mating. Family selection was practiced in this breeding station. Traits included in this study were birth weight at 0 day (BWc), weaning weight at 205 days of age (WWc), yearling weight at 365 days of age (YWc) and final weight at 550 days of age (FWc) of their progeny. The variance and covariance components were estimated by the Paternal Half-sib Correla

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15

Melnikova, Ekaterina, Artem Kabanov, Sergey Nikitin, et al. "Application of Genomic Data for Reliability Improvement of Pig Breeding Value Estimates." Animals 11, no. 6 (2021): 1557. http://dx.doi.org/10.3390/ani11061557.

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Replacement pigs’ genomic prediction for reproduction (total number and born alive piglets in the first parity), meat, fatness and growth traits (muscle depth, days to 100 kg and backfat thickness over 6–7 rib) was tested using single-step genomic best linear unbiased prediction ssGBLUP methodology. These traits were selected as the most economically significant and different in terms of heritability. The heritability for meat, fatness and growth traits varied from 0.17 to 0.39 and for reproduction traits from 0.12 to 0.14. We confirm from our data that ssGBLUP is the most appropriate method o

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16

Shahinfar, Saleh, Hassan Mehrabani-Yeganeh, Caro Lucas, Ahmad Kalhor, Majid Kazemian, and Kent A. Weigel. "Prediction of Breeding Values for Dairy Cattle Using Artificial Neural Networks and Neuro-Fuzzy Systems." Computational and Mathematical Methods in Medicine 2012 (2012): 1–9. http://dx.doi.org/10.1155/2012/127130.

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Developing machine learning and soft computing techniques has provided many opportunities for researchers to establish new analytical methods in different areas of science. The objective of this study is to investigate the potential of two types of intelligent learning methods, artificial neural networks and neuro-fuzzy systems, in order to estimate breeding values (EBV) of Iranian dairy cattle. Initially, the breeding values of lactating Holstein cows for milk and fat yield were estimated using conventional best linear unbiased prediction (BLUP) with an animal model. Once that was established

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17

Andersen, S. "Calculation of response and variance reduction due to multi-stage and multiple trait selection." Animal Science 58, no. 1 (1994): 1–9. http://dx.doi.org/10.1017/s0003356100007017.

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AbstractIn deterministic comparisons of breeding schemes it is necessary to take account of variance reduction due to selection. This can take place as multi-stage selection within generations and it takes place across generations when offspring of selected parents are selected. A standard way to deal with this is to set up selection index equations where the parameters are altered as a consequence of selection. It is shown that if the breeding schemes use a univariate or multivariate best linear unbiased prediction (BLUP) animal model for prediction of breeding values this procedure can be si

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18

Lee, Jungjae, SeokHyun Lee, Jong-Eun Park, et al. "Genome-wide association study and genomic predictions for exterior traits in Yorkshire pigs1." Journal of Animal Science 97, no. 7 (2019): 2793–802. http://dx.doi.org/10.1093/jas/skz158.

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Abstract The objectives of this study were to identify informative genomic regions that affect the exterior traits of purebred Korean Yorkshire pigs and to investigate and compare the accuracy of genomic prediction for response variables. Phenotypic data on body height (BH), body length (BL), and total teat number (TTN) from 2,432 Yorkshire pigs were used to obtain breeding values including as response variable the estimated breeding value (EBV) and 2 types of deregressed EBVs—one including the parent average (DEBVincPA) and the other excluding it (DEBVexcPA). A final genotype panel comprising

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Greenwood, P. L., G. E. Gardner, and R. S. Hegarty. "Lamb myofibre characteristics are influenced by sire estimated breeding values and pastoral nutritional system." Australian Journal of Agricultural Research 57, no. 6 (2006): 627. http://dx.doi.org/10.1071/ar04318.

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The objective of this study was to establish the extent to which lamb myofibre characteristics at ~8 months of age were influenced by sire (n = 9) estimated breeding values (EBVs) and pasture-based nutritional systems (low and high quality and availability, LOW and HIGH) from birth to slaughter (n = 56). Immunostaining of myosin heavy chain isoforms in longissimus muscle fibres revealed that as the post-weaning eye muscle depth EBV (PEMD) increased, the percentage of type 2B/X myofibres increased and the percentage of type 2A myofibres decreased. The percentage of type 2B/X myofibres also incr

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Suryana, Muh M., B. J. Takaendengan, Umar Paputungan, and E. Pudjihastuti. "ESTIMASI NILAI PEMULIAAN DAN MPPA (Most Probable Producing Ability) KUDA PACU BERDASARKAN SIFAT KECEPATAN LARI." ZOOTEC 40, no. 2 (2020): 392. http://dx.doi.org/10.35792/zot.40.2.2020.28295.

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ESTIMATION BREEDING VALUE AND MPPA (Most Probable Producing Ability) OF RACEHORSES BASED ON NATURE OF RUNNING SPEED. The aim of this study was to obtain the estimated number of breeding values from the racehorses parent in Minahasa for racehorse selection based on the superiority of genetic traits of speed. The descriptive analysis such asaverage, standard deviation and coefficient of variation of the speed and performance were done as the first step. Heritability, ripitability and the probability of breeding value (PBV) were calculated after all. The results of this study indicate that the va

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Greenwood, P. L., G. E. Gardner, and R. S. Hegarty. "Indices of cellular development in muscles of lambs are influenced by sire estimated breeding values and pastoral nutritional system." Australian Journal of Agricultural Research 57, no. 6 (2006): 651. http://dx.doi.org/10.1071/ar05205.

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This study examined influences of sire (n = 9) estimated breeding values (EBVs), sire-group (Muscle, Growth, and Control), and nutrition (low and high quality and availability pasture) from birth to slaughter at ~8 months of age on indices of muscle cellularity and transcriptional and translational capacity in 56 castrate lambs. Effects of nutritional systems to 8 months of age were greater, overall, than those due to EBVs or sire-group. Amount of DNA increased with increasing EBV for post-weaning eye muscle depth (PEMD or Muscle EBV) in longissimus but not in semimembranosus and semitendinosu

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Kennedy, B. W., V. M. Quinton, and C. Smith. "Genetic changes in Canadian performance-tested pigs for fat depth and growth rate." Canadian Journal of Animal Science 76, no. 1 (1996): 41–48. http://dx.doi.org/10.4141/cjas96-006.

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Data on more than 1.3 million pigs of four breeds in four regions of Canada were used to estimate genetic changes in fat depth and growth rate from 1976 to 1993. Analysis was by a multi (two)-trait best linear unbiased prediction (BLUP) animal model within breed and across regions. The genetic changes were measured as the changes in average estimated breeding value (EBV) over years.The across-breed average total phenotypic changes from 1976 to 1993 were− 3.9 mm in fat depth (26% of the mean) and− 17 d in age at 100 kg (9% of the mean). The multi-trait BLUP estimates of the genetic trends were

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23

Cheng, Jian, Rohan Fernando, and Jack C. Dekkers. "32 Cross validation of best linear unbiased predictions of breeding values using an efficient leave-one-out strategy." Journal of Animal Science 98, Supplement_4 (2020): 10–11. http://dx.doi.org/10.1093/jas/skaa278.020.

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Abstract Efficient strategies have been developed for leave-one-out cross validation (LOOCV) of predicted phenotypes in a simple model with an overall mean and marker effects or animal genetic effects to evaluate the accuracy of genomic predictions. For such a model, the correlation between the predicted and the observed phenotype is identical to the correlation between the observed phenotype and the estimated breeding value (EBV). When the model is more complex, with multiple fixed and random effects, although the correlation between the observed and predicted phenotype can be obtained effici

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Mielenz, N., and L. Schüler. "Konstruktion von Indizes mit Restriktionen in Random Regression Modellen zur Veränderung der Wachstumskurve." Archives Animal Breeding 50, no. 6 (2007): 619–27. http://dx.doi.org/10.5194/aab-50-619-2007.

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Abstract. Title of the paper: Index construction with restrictions in random regression models to change the pattern of the growth curve Random regression models provide estimated breeding values (EBV) for the complete growth curve for any target age. The animal-specific curves can be described as the weighted sum of continuous covariates with random regression coefficients. By using the covariance matrix K of the additive genetic regression coefficients the response to index selection can be calculated for any age or time of the test period. In this study selection indexes with equality restr

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25

Ignat'eva, L., A. Konte, and A. Sermyagin. "To the question of evaluating the efficiency of linear breeding in Simmental cattle breed different origin." Agrarian Bulletin of the 197, no. 6 (2020): 49–57. http://dx.doi.org/10.32417/1997-4868-2020-197-6-49-57.

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Abstract. The purpose of the research – to study the impact of related foreign pedigree resources on the Russian population of Simmental cattle. Research Methods. Studies carried out on cows of Simmental breed of different linear origin and genotypes in five regions of Russian Federation: Voronezh, Oryol, Kursk, Belgorod regions and Altayskiy krai, the total number was 35147 cows. EBV estimates were calculated through RENUMF 90, REMLF 90 and BLUPF 90 programs. Evaluation of the components of the variants of genetic and paratypical nature was carried out using the method restricted maximum like

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Huisman, A. E., D. J. Brown, and N. M. Fogarty. "Ability of sire breeding values to predict progeny bodyweight, fat and muscle using various transformations across environments in terminal sire sheep breeds." Animal Production Science 56, no. 1 (2016): 95. http://dx.doi.org/10.1071/an14666.

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Data used for the genetic evaluation of the terminal sire sheep breeds in Australia originate from a large range of genotypes and environments. This means there are large differences in the level of production and therefore contemporary group means and variances within the data. This study examined four transformations to account for the heterogeneity of variance in the observed data and their effect on the ability of estimated breeding values of sires (sire EBV) to predict progeny performance. This predictive ability was described by regressing offspring performance on sire EBV. The expected

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Magnabosco, Cláudio U., Fernando Lopes, Valentina Magnabosco, et al. "PSXII-22 Genomic prediction accuracy for feed efficiency related traits using different pseudo-phenotypes, prediction and validation methods in Nellore cattle." Journal of Animal Science 98, Supplement_4 (2020): 245–46. http://dx.doi.org/10.1093/jas/skaa278.446.

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Abstract The aim of the study was to evaluate prediction methods, validation approaches and pseudo-phenotypes for the prediction of the genomic breeding values of feed efficiency related traits in Nellore cattle. It used the phenotypic and genotypic information of 4,329 and 3,594 animals, respectively, which were tested for residual feed intake (RFI), dry matter intake (DMI), feed efficiency (FE), feed conversion ratio (FCR), residual body weight gain (RG), and residual intake and body weight gain (RIG). Six prediction methods were used: ssGBLUP, BayesA, BayesB, BayesCπ, BLASSO, and BayesR. Th

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Rajkumar, U., L. Leslie Leo Prince, K. S. Rajaravindra, S. Haunshi, M. Niranjan, and R. N. Chatterjee. "Analysis of (co) variance components and estimation of breeding value of growth and production traits in Dahlem Red chicken using pedigree relationship in an animal model." PLOS ONE 16, no. 3 (2021): e0247779. http://dx.doi.org/10.1371/journal.pone.0247779.

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Variance and covariance components of growth and production traits were analyzed employing REML animal model to assess the Dahlem Red (PD-3) chicken population for direct additive genetic, maternal effects and to estimate the estimated breeding value (EBV), genetic parameters, genetic trends and rate of inbreeding (ΔF) utilizing seven generation’s data. The generation and hatch had significant (P≤0.01) effect on the body weight at 0 day (BW0), 2 (BW2), 4 (BW4) and 6 weeks (BW6) and shank length at six weeks of age (SL6). The average least squares means (LSM) for BW6 and SL6 were 273.93±0.62 g

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Ali, A., K. Javed, I. Zahoor, and K. M. Anjum. "Analysis of non-genetic and genetic influences underlying the growth of Kajli lambs." South African Journal of Animal Science 50, no. 4 (2020): 613–25. http://dx.doi.org/10.4314/sajas.v50i4.13.

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Data on 2931 Kajli lambs, born from 2007 to 2018, were used to quantify environmental and genetic effects on growth performance of Kajli sheep. Traits considered for evaluation were birth weight (BWT), 120-day adjusted weight (120DWT), 180-day adjusted weight (180DWT), 270-day adjusted weight (270DWT), and 365-day adjusted weight (365DWT). Fixed effects of year of birth, season of birth, sex, birth type, and dam age on these traits were evaluated using linear procedures of SAS, 9.1. Similarly, BWT, 120DWT, 180DWT, and 270DWT were used as fixed effects mixed model analyses. Variance components,

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Stephens, M. Joseph, Jessica Scalzo, Peter A. Alspach, Ron A. Beatson, and Ann Marie Connor. "Genetic Variation and Covariation of Yield and Phytochemical Traits in a Red Raspberry Factorial Study." Journal of the American Society for Horticultural Science 134, no. 4 (2009): 445–52. http://dx.doi.org/10.21273/jashs.134.4.445.

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Breeding for high yield is a major objective of most small fruit breeding programs worldwide. In recent years, research associated with health benefits of berry fruit has resulted in some breeding programs looking for material with improved health properties with the goal of incorporating these into genotypes with high yield and other favorable agronomic characters. In this study, we estimated variance components, heritabilities, and phenotypic and genotypic correlations for yield components and phytochemicals [total phenolics (TPH), antioxidant activity (FRAP), and total anthocyanins (TACY)]

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Baller, Johnna L., Stephen D. Kachman, Larry A. Kuehn, and Matthew L. Spangler. "38 Using pooled data for single-step genomic prediction: Impact of within-pool variance and size." Journal of Animal Science 98, Supplement_4 (2020): 9. http://dx.doi.org/10.1093/jas/skaa278.017.

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Abstract Economically relevant traits (ERT) are routinely collected within commercial segments of the beef industry but are rarely included in genetic evaluations because of unknown pedigrees. Individual relationships could be resurrected with genomics, which would be costly; pooling DNA and phenotypic data provides a cost-effective solution. A simulated beef cattle population consisting of 15 generations was genotyped with approximately 50k markers (841 quantitative trait loci were located across the genome) and phenotyped for a moderately heritable trait. Individuals from generation 15 were

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Fu, Donghai, Xiaoming Ma, Congjun Jia, et al. "A Study of Genomic Prediction of 12 Important Traits in the Domesticated Yak (Bos grunniens)." Animals 9, no. 11 (2019): 927. http://dx.doi.org/10.3390/ani9110927.

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The aim of this study was to explore the possibility of applying GP to important economic traits in the domesticated yak, thus providing theoretical support for its molecular breeding. A reference population was constructed consisting of 354 polled yaks, measuring four growth traits and eight hematological traits related to resistance to disease (involved in immune response and phagocytosis). The Illumina bovine HD 770k chip was used to obtain SNP information of all the individuals. With these genotypes and phenotypes, GBLUP, Bayes B and Bayes Cπ methods were used to predict genomic estimated

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Lewis, R. M., R. E. Crump, G. Simm, and R. Thompson. "Assessing connectedness in across-flock genetic evaluations." Proceedings of the British Society of Animal Science 1999 (1999): 121. http://dx.doi.org/10.1017/s1752756200002763.

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With across-flock genetic evaluations, the extent of genetic links or connectedness between animals in separate flocks affects the reliability of selection decisions. As connectedness improves, error in comparing breeding values among flocks falls. Connectedness is thought more important when founder animals (i.e. unknown parentage) of separate flocks differ genetically. The prediction error variance (PEV) of differences in estimated breeding values (EBV) between animals is considered an appropriate measure of connectedness (Kennedy and Trus, 1993). In this study the level of connectedness, an

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Velazco, J. I., R. M. Herd, D. J. Cottle, and R. S. Hegarty. "Daily methane emissions and emission intensity of grazing beef cattle genetically divergent for residual feed intake." Animal Production Science 57, no. 4 (2017): 627. http://dx.doi.org/10.1071/an15111.

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As daily methane production (DMP; g CH4/day) is strongly correlated with dry matter intake (DMI), the breeding of cattle that require less feed to achieve a desired rate of average daily gain (ADG) by selection for a low residual feed intake (RFI) can be expected to reduce DMP and also emission intensity (EI; g CH4/kg ADG). An experiment was conducted to compare DMP and EI of Angus cattle genetically divergent for RFI and 400-day weight (400dWT). In a 6-week grazing study, 64 yearling-age cattle (30 steers, 34 heifers) were grazed on temperate pastures, with heifers and steers grazing separate

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Hall, D. G., A. R. Gilmour, N. M. Fogarty, and P. J. Holst. "Growth and carcass composition of second-cross lambs. 2. Relationship between estimated breeding values of sires and their progeny performance under fast and slow growth regimes." Australian Journal of Agricultural Research 53, no. 12 (2002): 1341. http://dx.doi.org/10.1071/ar01194.

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Growth and carcass performance of 2316 ewe and cryptorchid second-cross lambs over 2 years was related to the LAMBPLAN estimated breeding values (EBVs) of their sires. The lambs (56–156 per sire) were sired by 20 Poll Dorset rams from one stud, which were selected to represent a range of EBVs for growth rate and leanness. Half of each lamb sex group was grown at a fast rate from weaning to slaughter at 40 kg liveweight for ewes or 48 kg for cryptorchids. The other half was grown at a slower rate to the same slaughter weights, 10–13 weeks later. Lamb measurements included liveweight approximate

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Weaver, Andrew R., Donald L. Wright, Scott P. Greiner, and Scott A. Bowdridge. "197 Utilization of Katahdin rams with lower fecal egg count estimated breeding values improves parasite resistance and fitness traits of progeny." Journal of Animal Science 97, Supplement_1 (2019): 78. http://dx.doi.org/10.1093/jas/skz053.178.

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Abstract Genetic selection for internal parasite resistance in sheep is a valuable tool to mitigate effects of parasitism especially when significant within breed variability exists. To better understand the mechanism underpinning this variability, a divergent mating scheme was established. Katahdin rams (n = 4) were selected based on their estimated breeding value (EBV) for fecal egg count (FEC) and grouped as numerically high (HiFEC; n = 2) or low (LoFEC; n = 2). Rams were randomly mated to Katahdin ewes at the Southwest Virginia Agriculture Research and Extension Center. Lambs were born mid

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Grundy, B., and WG Hill. "A method for reducing inbreeding with Best Linear Unbiased Prediction." Proceedings of the British Society of Animal Production (1972) 1993 (March 1993): 33. http://dx.doi.org/10.1017/s030822960002362x.

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An optimum way of selecting animals is through a prediction of their genetic merit (estimated breeding value, EBV), which can be achieved using a best linear unbiased predictor (BLUP) (Henderson, 1975). Selection decisions in a commercial environment, however, are rarely made solely on genetic merit but also on additional factors, an important example of which is to limit the accumulation of inbreeding. Comparison of rates of inbreeding under BLUP for a range of hentabilities highlights a trend of increasing inbreeding with decreasing heritability. It is therefore proposed that selection using

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Hradecká, E., J. Čítek, L. Panicke, V. Řehout, and L. Hanusová. "The relation of GH1, GHR and DGAT1 polymorphisms with estimated breeding values for milk production traits of German Holstein sires." Czech Journal of Animal Science 53, No. 6 (2008): 238–46. http://dx.doi.org/10.17221/362-cjas.

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: We analysed the relations of estimated breeding values (EBV) of 315 German Holstein sires to their genotypes in growth hormone gene (<i>GH1</i>), growth hormone receptor gene (<i>GHR</i>) and acylCoA-diacylglycerol acyltransferase 1 (<i>DGAT1</i>). The strong relation of <i>DGAT1 K232A</i> to the estimated breeding values for milk production traits has been confirmed, when allele <i>DGAT1<sup>K</sup></i> was connected with higher milk fat yield, milk fat and milk protein content, while allele <i>DGAT1<sup>A&l

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Burke, J. M., D. R. Notter, and J. E. Miller. "105 Sire's Estimated Breeding Value (EBV) for Fecal Egg Count (FEC) Influences BW, FEC, and Anemia Measures of Offspring in Katahdin Sheep." Journal of Animal Science 95, suppl_1 (2016): 52. http://dx.doi.org/10.2527/ssasas2017.0105.

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Hopkins, D. L., R. S. Hegarty, and T. C. Farrell. "Relationship between sire estimated breeding values and the meat and eating quality of meat from their progeny grown on two planes of nutrition." Australian Journal of Experimental Agriculture 45, no. 5 (2005): 525. http://dx.doi.org/10.1071/ea03175.

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The meat of 140 female lambs was examined. These lambs were sired by 9 Poll Dorset sires (3 selected for growth, 3 for muscling and 3 control) and fed either a low or high plane of nutrition from birth to slaughter. All carcasses were electrically stimulated and portions of M. longissimus thoracis et lumborum (loin) aged for 5 days before freezing. Subsequently, 10 consumers tested each portion for eating quality traits. A portion of the same muscle from the opposing side of the carcass was divided into 3 sections and aged for either 1, 3 or 5 days and then used to measure shear force (objecti

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Nwogwugwu, Chiemela Peter, Yeongkuk Kim, Hyunji Choi, Jun Heon Lee, and Seung-Hwan Lee. "Assessment of genomic prediction accuracy using different selection and evaluation approaches in a simulated Korean beef cattle population." Asian-Australasian Journal of Animal Sciences 33, no. 12 (2020): 1912–21. http://dx.doi.org/10.5713/ajas.20.0217.

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Objective: This study assessed genomic prediction accuracies based on different selection methods, evaluation procedures, training population (TP) sizes, heritability (h<sup>2</sup>) levels, marker densities and pedigree error (PE) rates in a simulated Korean beef cattle population.Methods: A simulation was performed using two different selection methods, phenotypic and estimated breeding value (EBV), with an h<sup>2</sup> of 0.1, 0.3, or 0.5 and marker densities of 10, 50, or 777K. A total of 275 males and 2,475 females were randomly selected from the last generation t

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McHugh, N., T. Pabiou, K. McDermott, E. Wall, and D. P. Berry. "Impact of birth and rearing type, as well as inaccuracy of recording, on pre-weaning lamb phenotypic and genetic merit for live weight1." Translational Animal Science 1, no. 2 (2017): 137–45. http://dx.doi.org/10.2527/tas2017.0015.

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Abstract The objective of the present study was to quantify the impact of the systematic environmental effects of both birth and rearing type on pre-weaning lamb live weight, and to evaluate the repercussions of inaccurate recording of birth and rearing type on subsequent genetic evaluations. A total of 32,548 birth weight records, 35,770 forty-day weight records and 32,548 records for average daily gain (ADG) between birth and 40-day weight from the Irish national sheep database were used. For each lamb, a new variable, birth-rearing type, reflecting both the birth and rearing type of a lamb

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Pawlik, Adrianna, Grażyna Sender, Magdalena Sobczyńska, Agnieszka Korwin-Kossakowska, Henryka Lassa, and Jolanta Oprządek. "Lactoferrin gene variants, their expression in the udder and mastitis susceptibility in dairy cattle." Animal Production Science 55, no. 8 (2015): 999. http://dx.doi.org/10.1071/an13389.

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Lactoferrin gene (LF) is regarded as one of the potential markers of mastitis susceptibility/resistance in dairy cattle. The study’s aim was therefore, to investigate the feasibility of two single nucleotide polymorphisms (SNP), placed in the 5′-flanking region and 3′-untranslated region of the LF gene, to serve as mastitis markers. The associations between these SNP and the expression of LF, both on mRNA and protein level, were estimated in the milk of Polish Holstein-Friesian cows. The relationships between polymorphisms and cows’ estimated breeding values (EBV) for somatic cell count were a

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Lourenco, Daniela, Shogo Tsuruta, Yutaka Masuda, and Ignacy Misztal. "384 Genetic and Genomic Analysis in Livestock with Increasing Datasets." Journal of Animal Science 98, Supplement_4 (2020): 137–38. http://dx.doi.org/10.1093/jas/skaa278.253.

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Abstract In animal breeding and genetics, statistical methods have been used for several decades to identify animals with the best genetic potential. One of the foundations for computing accurate estimated breeding values (EBV) is the amount of data that is used in the evaluation system — as the more data points one animal has, the more accurate its EBV is going to be. However, the animal breeding and genetics field periodically faces a big data paradox, where efficient methods have to be developed to handle the amount of data collected over time, given the computing capacity becomes the limit

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Lidauer, Martin, and Esa Mäntysaari. "Detection of bias in animal model pedigree indices of heifers." Agricultural and Food Science 5, no. 4 (1996): 387–97. http://dx.doi.org/10.23986/afsci.72751.

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The objective of the study was to test whether the pedigree indices (PI) of heifers are biased, and if so, whether the magnitude of the bias varies in different groups of heifers. Therefore, two animal model evaluations with two different data sets were computed. Data with all the records from the national evaluation in December 1994 was used to obtain estimated breeding values (EBV) for 305-days’ milk yield and protein yield. In the second evaluation, the PIs were estimated for cows calving the first time in 1993 by excluding all their production records from the data. Three different statist

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Weisz, F., T. Urban, P. Chalupová, and A. Knoll. "Association analysis of seven candidate genes with performance traits in Czech Large White pigs." Czech Journal of Animal Science 56, No. 8 (2011): 337–44. http://dx.doi.org/10.17221/169/2010-cjas.

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&nbsp;In this study association analyses were performed between genes tagged SNP (IGF2, NAMPT, DGAT1, MYF4, MC3R, MC4R and MYOD1), performance traits (backfat thickness, lean meat content, average daily gain from birth to the end of the test, average daily gain in test) and estimated breeding values (EBVs) in a population of Czech Large White sows (n = 101). Genotyping of all SNPs was performed by SNapShot with the exception of SNP within NAMPT gene for which HpaII PCR-RFLP assay was used. The following significant associations between genes tagged SNPs and traits or EBVs were found out: D

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Buzanskas, M. E., R. P. Savegnago, D. A. Grossi, et al. "Genetic parameter estimates and principal component analysis of breeding values of reproduction and growth traits in female Canchim cattle." Reproduction, Fertility and Development 25, no. 5 (2013): 775. http://dx.doi.org/10.1071/rd12132.

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Phenotypic data from female Canchim beef cattle were used to obtain estimates of genetic parameters for reproduction and growth traits using a linear animal mixed model. In addition, relationships among animal estimated breeding values (EBVs) for these traits were explored using principal component analysis. The traits studied in female Canchim cattle were age at first calving (AFC), age at second calving (ASC), calving interval (CI), and bodyweight at 420 days of age (BW420). The heritability estimates for AFC, ASC, CI and BW420 were 0.03 ± 0.01, 0.07 ± 0.01, 0.06 ± 0.02, and 0.24 ± 0.02, res

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Konkruea, Tawirat, Skorn Koonawootrittriron, Mauricio A. Elzo, and Thanathip Suwanasopee. "Accuracy of Genomic-Polygenic and Polygenic Breeding Values for Age at First Calving and Milk Yield in Thai Multibreed Dairy Cattle." Annals of Animal Science 19, no. 3 (2019): 633–45. http://dx.doi.org/10.2478/aoas-2019-0032.

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AbstractSingle-nucleotide polymorphisms (SNPs) have been used in genomic prediction and shown to increase prediction accuracy and selection responses for economic traits in dairy cattle. The successful report in genomic prediction for improving age at first calving (AFC) and 305-d milk yield (MY) in multibreed dairy population is limited. Therefore, the objective of this research was to compare estimates of variance components, genetic parameters, and prediction accuracies for AFC and MY using a genomic-polygenic model (GPM) and a polygenic model (PM). The AFC and MY records of 9,106 first-lac

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Ribeiro, Anamaria Cândido, Alan Jackson McAllister, and Sandra Aidar de Queiroz. "Profitability measures of dairy cows." Revista Brasileira de Zootecnia 37, no. 9 (2008): 1607–16. http://dx.doi.org/10.1590/s1516-35982008000900012.

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This study was aimed at defining profitability measures designed for prediction of breeding values (EBV) in dairy cows. Performance and economic data recorded in herds enrolled in the DHIA (Dairy Herd Improvement Association) program in Kentucky, USA, were used to evaluate economic functions which included the following profitability measures: lifetime net income (LNI), efficiency (EF), milk income over feed costs (IOFC), net income per day of productive life (NIPL), net income at the end of the first lactation (NI1), and milk income over feed costs at the end of the first lactation (IOFC1). T

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Leitch, H. W., C. Smith, E. B. Burnside, and M. Quinton. "Effects of female reproductive rate and mating design on genetic response and inbreeding in closed nucleus dairy herds." Animal Science 60, no. 3 (1995): 389–400. http://dx.doi.org/10.1017/s1357729800013266.

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AbstractHierarchical (each dam mated to one sire) and factorial (each dam mated to several sires) designs involving juvenile selection in a closed nucleus breeding programme were compared for rates of genetic response and inbreeding using stochastic simulation. Numbers of sires and dams selected and herd sizes varied. Generations were discrete. Sires and dams were selected at 15 months on the basis of an estimated breeding value (EBV) calculated using selection index which considered information on close relatives. Selection was for total merit index. Matings were carried out assuming use of m

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