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Moncaleano-Vega J, Amaya A, Martínez C, Burgos-Paz W, Cerón-Muñoz M. Economic utility of Colombian Romosinuano cattle. Trop Anim Health Prod 2024; 56:217. [PMID: 39030339 DOI: 10.1007/s11250-024-04066-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Accepted: 06/25/2024] [Indexed: 07/21/2024]
Abstract
The objective of this study was to quantify the economic utility in Romosinuano production systems by developing a bioeconomic model assumed cow-calf, cow-calf plus stocker (CCPS), and complete cycle operations. Each system produced males for sale and females for replacement. Input parameters were established from breed data collected by AGROSAVIA. Revenues were estimated using the official cattle price, and production costs were quantified per activity. In the results, for cow-calf operations, the maximum economic utility was 244.12 USD. CCPS, yielded 231.86 USD, and Complete cycle, 268.94 USD. The genetic progress per generation for W240, W480, W24 and CI was + 3.8 kg, + 5 kg, + 5.9 kg, and -1 d, respectively. The price of livestock was the sensitized variable with the greatest impact on maximum economic utility (± 118.64 USD to ± 155.44 USD), followed by mineral supplementation (16.31 USD to ± 37.34 USD). The sensitized variables with the lowest impact were food (± 1.62 USD to ± 1.8 USD) and health plan supplies (± 6.03 USD to ± 9.13 USD). It is concluded that economic utility defined as a composite trait influenced by the characteristics that shape it favors genetic progress and the identification of animals with optimal performance in different bovine production systems.
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Affiliation(s)
- Juana Moncaleano-Vega
- Facultad de Ciencias Agrarias, Doctorado en Ciencias Animales, Universidad de Antioquia, Medellín, Colombia.
- Facultad de Medicina Veterinaria y Zootecnia, Universidad del Tolima, Ibagué, Colombia.
| | - Alejandro Amaya
- Universidad de Ciencias Aplicadas y Ambientales U.D.C.A, Programa de Zootecnia, Bogotá, Colombia
| | - Carlos Martínez
- Departamento de Producción Animal, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional de Colombia, Bogotá, Colombia
| | - William Burgos-Paz
- Corporación Colombiana de Investigación Agropecuaria-AGROSAVIA, Centro de Investigación Turipaná, Km 13 Vía Montería-Cereté, Córdoba, Colombia
| | - Mario Cerón-Muñoz
- Grupo de Investigación GAMMA, Facultad de Ciencias Agrarias, Universidad de Antioquia, Medellín, Colombia
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Awasthi TR, Morshed A, Williams T, Swain DL. Simulation Approaches Used for Management and Decision Making in the Beef Production Sector: A Systematic Review. Animals (Basel) 2024; 14:1632. [PMID: 38891679 PMCID: PMC11171018 DOI: 10.3390/ani14111632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Revised: 05/13/2024] [Accepted: 05/28/2024] [Indexed: 06/21/2024] Open
Abstract
Simulation models are used in various areas of agriculture to better understand the system and assist in decision making. In the beef production sector, a variety of simulation research focusing on various dimensions of the system is available. However, an overview of the available research is lacking. Therefore, a systematic review was conducted to provide an overview of simulation studies of beef production and create an understanding of the simulation approaches used. Scopus, Web of Science, and ProQuest Central research databases were used to search the relevant articles, with the last search conducted in June 2023. Studies that developed or used simulation strategies and used beef cattle as a primary focus of the study were included. The 105 studies included in this review were examined thoroughly to record the authors, year of publication, country of study, type of study, focus area of the study, simulated scenarios, validation methods, and software programs used. There has been growing research interest in simulating beef production systems worldwide, with most studies conducted in North America and Europe. Among these studies, the majority (84.76%, n = 89) are biophysical or bioeconomic study types and use deterministic approaches (n = 42). Additionally, most studies have a whole-farm scope (38.09%, n = 40) and focus on productivity (51.43%, n = 54). Since only less than half of the studies mentioned the validation techniques and software programs used, there is a need to improve the availability of this information to ensure that the models are adopted effectively in decision making.
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Affiliation(s)
- Tek Raj Awasthi
- School of Health Medical and Applied Sciences, CQUniversity, Rockhampton North, QLD 4701, Australia; (T.W.); (D.L.S.)
| | - Ahsan Morshed
- School of Engineering and Technology, CQUniversity, Melbourne, VIC 3000, Australia;
| | - Thomas Williams
- School of Health Medical and Applied Sciences, CQUniversity, Rockhampton North, QLD 4701, Australia; (T.W.); (D.L.S.)
| | - Dave L. Swain
- School of Health Medical and Applied Sciences, CQUniversity, Rockhampton North, QLD 4701, Australia; (T.W.); (D.L.S.)
- TerraCipher, Alton Downs, QLD 4702, Australia
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Vaz RZ, Lobato JFP, Bethancourt-Garcia JA, Pacheco RF, Reis NP, Sartori DBS, Jappe SA, Restle J. Environmental factors on the probability of pregnancy in early or conventionally weaned beef cows. Anim Reprod 2023; 20:e20230054. [PMID: 37795201 PMCID: PMC10546909 DOI: 10.1590/1984-3143-ar2023-0054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Accepted: 06/29/2023] [Indexed: 10/06/2023] Open
Abstract
Potential variables for the reproductive success of beef cows were evaluated. Included in the model were the age of the cow at calving; the interval between the Julian calving date and the end of the breeding season; the body weight and conditions at calving, at 75 days post-partum and at the end of the breeding season; and the mean daily variation in weight between these dates. Logistic regression was used in the analysis, with the parameters evaluated using the odds ratio statistic, estimating the chance of pregnancy. The mean rate of pregnancy was 84% and 55% for early and late-weaned cows, respectively. For early weaned cows, the regression variables were the Julian calving date, age of the cow, weight gain from calving to 75 days post-partum, and from 75 days post-partum to the end of the reproductive period. For late-weaned cows, there were only two regression variables, weight at calving and weight gain from calving to the end of the reproductive period. For every year above the average age of the herd, early weaned cows have an 80.9% greater chance of pregnancy, while a reduction of one year reduces the chance of pregnancy by 44.7%. In early weaned cows, every seven days after the mean Julian calving date reduces the chances of pregnancy by 22.6%, whereas every seven days before the mean calving date increases pregnancy by 29.2%. Greater gains in cow body weight, from calving to the end of the reproductive period, determine a greater probability of pregnancy.
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Affiliation(s)
| | | | | | | | | | | | | | - João Restle
- Universidade Federal de Goiás, Goiânia, GO, Brasil
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Bioeconomic assessment of three ages at weaning in cow-calf systems. Livest Sci 2022. [DOI: 10.1016/j.livsci.2022.105032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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5
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Amaya A, López Parra LC, Ramírez J. Selection indexes to optimise genetic and economic progress in Colombian Blanco Orejinegro cattle. Livest Sci 2022. [DOI: 10.1016/j.livsci.2022.105015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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6
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Pravia MI, Navajas EA, Aguilar I, Ravagnolo O. Evaluation of feed efficiency traits in different Hereford populations and their effect on variance component estimation. ANIMAL PRODUCTION SCIENCE 2022. [DOI: 10.1071/an21420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Context Residual feed intake is a relevant trait for beef cattle, given the positive impact on reducing feeding costs and greenhouse gas emissions. The lack of large databases is a restriction when estimating accurate genetic parameters for dry matter intake (DMI) and residual feed intake (RFI), and combining different data sets could be an alternative to increase the amount of data and achieve better estimations. Aim The main objective was to compare Uruguayan data (URY; 780 bulls) and Canadian data (CAN; 1597 bulls), and to assess the adequacy of pooling both data sets (ALL) for the estimation of genetic parameters for DMI and RFI. Methods Feed intake and growth traits phenotypes in both data sets were measured following the same protocols established by the Beef Improvement Federation. Pedigree connections among data sets existed, but were weak. Performance data were analysed for each data set, and individual partial regression coefficients for each energy sink on DMI were obtained and compared. Univariate and multivariate variance components were estimated by the restricted maximum likelihood (REML) for DMI, RFI and their energy sinks traits (average daily gain, metabolic mid weight and back fat thickness). Key results There were some differences in phenotypic performance among data (P < 0.01); however, no differences (P > 0.1) were observed for phenotypic values of RFI between sets. Heritability estimates for DMI were 0.42 (URY), 0.41 (CAN) and 0.45 for ALL data, whereas heritability estimates for RFI were 0.34 (URY), 0.20 (CAN) and 0.25 for ALL data. The results obtained indicate selection on reducing RFI could lead to a decrease in DMI, without compromising other performance traits, as genetic correlations between RFI, growth and liveweight were low or close to 0 (−0.12–0.07). Conclusions As genetic parameters were similar between national data sets (URY, CAN), pooling data (ALL) provided more accurate parameter estimations, as they presented smaller standard deviations, especially in multivariate analysis. Implications Parameters estimated here may be used in international or national genetic evaluation programs.
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Longevity and reproductive traits in Angus cattle: Genetic parameters, predicted and realized genetic change. Livest Sci 2021. [DOI: 10.1016/j.livsci.2021.104604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Effect of genomic X-chromosome regions on Nelore bull fertility. J Appl Genet 2021; 62:655-659. [PMID: 34145524 DOI: 10.1007/s13353-021-00645-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 06/07/2021] [Accepted: 06/10/2021] [Indexed: 10/21/2022]
Abstract
Scrotal circumference (SC) is a commonly used trait related to sexual precocity in bulls. Genome-wide association studies have uncovered a lot of genes related to this trait, however, only those present on autosomes. The inclusion of the second biggest chromosome (BTAX) can improve the knowledge of the genetic architecture of this trait. In this study, we performed a weighted, single-step, genome-wide association study using a 777 k BovineHD BeadChip (IllumHD) to analyze the association between SNPs and SC in Brazilian Nelore cattle. Phenotypes from 79,300 males and 3263 genotypes (2017 from females and 1246 from males)-(39,367 SNPs markers located at ChrX) were used. We identified eight regions on chromosome X that displayed important associations with SC. The results showed that together the genomic windows explained 28.52% of the genetic variance for the examined trait. Genes with potential functions in reproduction and fertility regulation were highlighted as candidates for sexual precocity rates in Nelore cattle (AFF2 and PJA1). Moreover, we found 10 genes that had not previously been identified as being associated with sexual precocity traits in cattle. These findings will further advance our understanding of the genetic architecture, considering mainly the presence of the chromosome X, for indicine cattle reproductive traits, being useful in the context of genomic prediction in beef cattle.
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Portes JV, Menezes GR, MacNeil MD, da Silva LO, Gondo A, Braccini Neto J. Selection indices for Nellore production systems in the Brazilian Cerrado. Livest Sci 2020. [DOI: 10.1016/j.livsci.2020.104309] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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10
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Simulations of feed intake, production output, and economic result within extensive and intensive suckler cow beef production systems. Livest Sci 2020. [DOI: 10.1016/j.livsci.2020.104229] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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11
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Amaya A, Garrick D, Martínez R, Cerón-Muñoz M. Economic values for index improvement of dual-purpose Simmental cattle. Livest Sci 2020. [DOI: 10.1016/j.livsci.2020.104224] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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12
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Bresolin T, Dórea JRR. Infrared Spectrometry as a High-Throughput Phenotyping Technology to Predict Complex Traits in Livestock Systems. Front Genet 2020; 11:923. [PMID: 32973876 PMCID: PMC7468402 DOI: 10.3389/fgene.2020.00923] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Accepted: 07/24/2020] [Indexed: 12/17/2022] Open
Abstract
High-throughput phenotyping technologies are growing in importance in livestock systems due to their ability to generate real-time, non-invasive, and accurate animal-level information. Collecting such individual-level information can generate novel traits and potentially improve animal selection and management decisions in livestock operations. One of the most relevant tools used in the dairy and beef industry to predict complex traits is infrared spectrometry, which is based on the analysis of the interaction between electromagnetic radiation and matter. The infrared electromagnetic radiation spans an enormous range of wavelengths and frequencies known as the electromagnetic spectrum. The spectrum is divided into different regions, with near- and mid-infrared regions being the main spectral regions used in livestock applications. The advantage of using infrared spectrometry includes speed, non-destructive measurement, and great potential for on-line analysis. This paper aims to review the use of mid- and near-infrared spectrometry techniques as tools to predict complex dairy and beef phenotypes, such as milk composition, feed efficiency, methane emission, fertility, energy balance, health status, and meat quality traits. Although several research studies have used these technologies to predict a wide range of phenotypes, most of them are based on Partial Least Squares (PLS) and did not considered other machine learning (ML) techniques to improve prediction quality. Therefore, we will discuss the role of analytical methods employed on spectral data to improve the predictive ability for complex traits in livestock operations. Furthermore, we will discuss different approaches to reduce data dimensionality and the impact of validation strategies on predictive quality.
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Affiliation(s)
- Tiago Bresolin
- Department of Animal and Dairy Sciences, University of Wisconsin-Madison, Madison, WI, United States
| | - João R R Dórea
- Department of Animal and Dairy Sciences, University of Wisconsin-Madison, Madison, WI, United States
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13
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Genetic parameters for growth and cow productivity traits in Angus, Hereford and crossbred cattle. Livest Sci 2020. [DOI: 10.1016/j.livsci.2020.103952] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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14
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Genetic correlations between scrotal circumference, heifer fertility and stayability in Charolais–Charbray cattle. Livest Sci 2020. [DOI: 10.1016/j.livsci.2019.103914] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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15
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Setiaji A, Oikawa T. Genetic parameters of reproductive traits from artificial insemination records of Japanese Black cows. Livest Sci 2019. [DOI: 10.1016/j.livsci.2019.09.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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16
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Reproductive performance of cows and genetic correlation with weight gains and principal components of traits used in selection of Nelore cattle. Livest Sci 2019. [DOI: 10.1016/j.livsci.2019.09.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Simões MRS, Leal JJB, Minho AP, Gomes CC, MacNeil MD, Costa RF, Junqueira VS, Schmidt PI, Cardoso FF, Boligon AA, Yokoo MJ. Breeding objectives of Brangus cattle in Brazil. J Anim Breed Genet 2019; 137:177-188. [PMID: 31179593 DOI: 10.1111/jbg.12415] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 04/25/2019] [Accepted: 05/14/2019] [Indexed: 11/29/2022]
Abstract
Our goal was to define a breeding objective for Brangus beef cattle in Brazil. Bioeconomic models were produced and used to estimate economic values (EVs). The scenarios simulated were typical full-cycle beef production systems that are used in tropical and subtropical regions. The breeding objective contained pregnancy rate (PR), warm carcass weight (WCW), mature cow weight (MCW), number of nematode eggs per gram of faeces (EPG) and tick count (TICK). Two models were used in series to estimate the EV. A deterministic model was used to simulate effects of PR, WCW and MCW on profitability with a constant parasite load. Subsequently, stochastic models were used to estimate economic values for TICK and EPG as consequences of their environmental effects on weight gains, mortality and health costs. The EV of PR, WCW, MCW, EPG and TICK, was US$1.59, US$2.11, -US$0.24, -US$5.35 and -US$20.88, respectively. Results indicate positive emphasis should be placed on PR (12.49%) and WCW (65.07%) with negative emphasis on MCW (13.92%), EPG (2.77%) and TICK (5.75%). In comparison with the indexes usually used, these results suggest a reformulation in the selection indexes of the beef production system in tropical and subtropical regions in order to obtain greater profitability.
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Affiliation(s)
- Michele R S Simões
- Postgraduate Program in Animal Husbandry - UFPEL, CAPES, Pelotas, Brazil
| | - Joal J B Leal
- Embrapa South Livestock, Center of Livestock Research of South Brazilian Fields (CPPSul), Brazilian Agricultural Research Corporation, Ministry of Agriculture, Livestock and Food Supply, Bagé, Brazil
| | - Alessandro P Minho
- Embrapa Southeast Livestock (CPPSE), Brazilian Agricultural Research Corporation, Ministry of Agriculture, Livestock and Food Supply, São Carlos, Brazil
| | - Cláudia C Gomes
- Embrapa South Livestock, Center of Livestock Research of South Brazilian Fields (CPPSul), Brazilian Agricultural Research Corporation, Ministry of Agriculture, Livestock and Food Supply, Bagé, Brazil
| | - Michael D MacNeil
- Delta G, Miles City, Montana.,Department of Animal, Wildlife and Grassland Sciences, University of the Free State, Bloemfontein, South Africa
| | - Rodrigo F Costa
- Postgraduate Program in Animal Husbandry - UFPEL, CAPES, Pelotas, Brazil
| | - Vinícius S Junqueira
- Postgraduate Program in Genetics and Improvement by the Federal University of Viçosa, Viçosa, Brazil
| | | | - Fernando F Cardoso
- Embrapa South Livestock, Center of Livestock Research of South Brazilian Fields (CPPSul), Brazilian Agricultural Research Corporation, Ministry of Agriculture, Livestock and Food Supply, Bagé, Brazil
| | | | - Marcos J Yokoo
- Embrapa South Livestock, Center of Livestock Research of South Brazilian Fields (CPPSul), Brazilian Agricultural Research Corporation, Ministry of Agriculture, Livestock and Food Supply, Bagé, Brazil
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Schmidt P, Campos G, Lôbo R, Souza F, Brauner C, Boligon A. Genetic analysis of age at first calving, accumulated productivity, stayability and mature weight of Nellore females. Theriogenology 2018; 108:81-87. [DOI: 10.1016/j.theriogenology.2017.11.035] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2017] [Revised: 11/24/2017] [Accepted: 11/26/2017] [Indexed: 11/28/2022]
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19
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Takada L, Barbero MMD, Oliveira HN, de Camargo GMF, Fernandes Júnior GA, Aspilcueta-Borquis RR, Souza FRP, Boligon AA, Melo TP, Regatieri IC, Feitosa FLB, Fonseca LFS, Magalhães AFB, Costa RB, Albuquerque LG. Genomic association for sexual precocity in beef heifers using pre-selection of genes and haplotype reconstruction. PLoS One 2018; 13:e0190197. [PMID: 29293544 PMCID: PMC5749767 DOI: 10.1371/journal.pone.0190197] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2017] [Accepted: 12/08/2017] [Indexed: 12/23/2022] Open
Abstract
Reproductive traits are of the utmost importance for any livestock farming, but are difficult to measure and to interpret since they are influenced by various factors. The objective of this study was to detect associations between known polymorphisms in candidate genes related to sexual precocity in Nellore heifers, which could be used in breeding programs. Records of 1,689 precocious and non-precocious heifers from farms participating in the Conexão Delta G breeding program were analyzed. A subset of single nucleotide polymorphisms (SNP) located in the region of the candidate genes at a distance of up to 5 kb from the boundaries of each gene, were selected from the panel of 777,000 SNPs of the High-Density Bovine SNP BeadChip. Linear mixed models were used for statistical analysis of early heifer pregnancy, relating the trait with isolated SNPs or with haplotype groups. The model included the contemporary group (year and month of birth) as fixed effect and parent of the animal (sire effect) as random effect. The fastPHASE® and GenomeStudio® were used for reconstruction of the haplotypes and for analysis of linkage disequilibrium based on r2 statistics. A total of 125 candidate genes and 2,024 SNPs forming haplotypes were analyzed. Statistical analysis after Bonferroni correction showed that nine haplotypes exerted a significant effect (p<0.05) on sexual precocity. Four of these haplotypes were located in the Pregnancy-associated plasma protein-A2 gene (PAPP-A2), two in the Estrogen-related receptor gamma gene (ESRRG), and one each in the Pregnancy-associated plasma protein-A gene (PAPP-A), Kell blood group complex subunit-related family (XKR4) and mannose-binding lectin genes (MBL-1) genes. Although the present results indicate that the PAPP-A2, PAPP-A, XKR4, MBL-1 and ESRRG genes influence sexual precocity in Nellore heifers, further studies are needed to evaluate their possible use in breeding programs.
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Affiliation(s)
- Luciana Takada
- Departamento de Zootecnia-São Paulo State University-UNESP, Jaboticabal, São Paulo, Brazil
| | - Marina M D Barbero
- Departamento de Zootecnia-São Paulo State University-UNESP, Jaboticabal, São Paulo, Brazil
| | - Henrique N Oliveira
- Departamento de Zootecnia-São Paulo State University-UNESP, Jaboticabal, São Paulo, Brazil
| | | | | | | | - Fabio R P Souza
- Departamento de Zootecnia-São Paulo State University-UNESP, Jaboticabal, São Paulo, Brazil
| | - Arione A Boligon
- Departamento de Zootecnia-São Paulo State University-UNESP, Jaboticabal, São Paulo, Brazil
| | - Thaise P Melo
- Departamento de Zootecnia-São Paulo State University-UNESP, Jaboticabal, São Paulo, Brazil
| | - Inaê C Regatieri
- Departamento de Zootecnia-São Paulo State University-UNESP, Jaboticabal, São Paulo, Brazil
| | - Fabieli L B Feitosa
- Departamento de Zootecnia-São Paulo State University-UNESP, Jaboticabal, São Paulo, Brazil
| | - Larissa F S Fonseca
- Departamento de Zootecnia-São Paulo State University-UNESP, Jaboticabal, São Paulo, Brazil
| | - Ana F B Magalhães
- Departamento de Zootecnia-São Paulo State University-UNESP, Jaboticabal, São Paulo, Brazil
| | - Raphael B Costa
- Departamento de Zootecnia-São Paulo State University-UNESP, Jaboticabal, São Paulo, Brazil
| | - Lucia G Albuquerque
- Departamento de Zootecnia-São Paulo State University-UNESP, Jaboticabal, São Paulo, Brazil
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Manzi M, Rydhmer L, Ntawubizi M, Karege C, Strandberg E. Growth traits of crossbreds of Ankole with Brown Swiss, Holstein Friesian, Jersey, and Sahiwal cattle in Rwanda. Trop Anim Health Prod 2017; 50:825-830. [PMID: 29260490 PMCID: PMC5866276 DOI: 10.1007/s11250-017-1501-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Accepted: 12/10/2017] [Indexed: 11/29/2022]
Abstract
The objective of the study was to compare body weights and growth from birth to 18 months of age of various groups of crossbred cattle born from 1999 to 2007, being crossbreds of Ankole (A) with Brown Swiss (B), Holstein Friesian (F), Jersey (J), and Sahiwal (S). Average weights were 26.5 kg at birth, 161 kg at weaning, and 226 kg at 18 months. Both season and sex significantly affected birth weight (BW), weight at 8 and 18 months (W8 and W18), and average daily gain from weaning to 18 months (ADG18) and, unlike season, sex significantly affected average daily gain to 8 months and weaning age. The general trend was that average daily gain attained a maximum before weaning and thereafter decreased until 18 months. Least square means for AB and AF calves were comparable and significantly differed only for W18 and ADG18. AJ had the lowest BW but was comparable with AS, AJxS, and ASxJ for W8, age-adjusted weaning weight, and W18. Generally, AF was heavier than other breed groups, but the difference was smaller than expected probably because environmental conditions did not allow full expression of genetic potential for growth.
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Affiliation(s)
- Maximillian Manzi
- Swedish University of Agricultural Sciences (SLU), Uppsala, Sweden. .,Rwanda Agricultural Board (RAB), Kigali, Rwanda. .,University of Rwanda (UR), Butare, Rwanda.
| | - Lotta Rydhmer
- Swedish University of Agricultural Sciences (SLU), Uppsala, Sweden
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21
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Costa RF, Teixeira BBM, Yokoo MJ, Cardoso FF. Economic selection indexes for Hereford and Braford cattle raised in southern Brazil. J Anim Sci 2017; 95:2825-2837. [PMID: 28727120 DOI: 10.2527/jas.2016.1314] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Economic selection indexes (EI) are considered the best way to select the most profitable animals for specific production systems. Nevertheless, in Brazil, few genetic evaluation programs deliver such indexes to their breeders. The aims of this study were to determine the breeding goals (BG) and economic values (EV, in US$) for typical beef cattle production systems in southern Brazil, to propose EI aimed to maximize profitability, and to compare the proposed EI with the currently used empirical index. Bioeconomic models were developed to characterize 3 typical production systems, identifying traits of economic impact and their respective EV. The first was called the calf-crop system and included the birth rate (BR), direct weaning weight (WWd), and mature cow weight (MCW) as selection goals. The second system was called the full-cycle system, and its breeding goals were BR, WWd, MCW, and carcass weight (CW). Finally, the third was called the stocking and finishing system, which had WWd and CW as breeding goals. To generate the EI, we adopted the selection criteria currently measured and used in the empirical index of PampaPlus, which is the genetic evaluation program of the Brazilian Hereford and Braford Association. The comparison between the EI and the current PampaPlus index was made by the aggregated genetic-economic gain per generation (Δ). Therefore, for each production system an index was developed using the derived economic weights, and it was compared with the current empirical index. The relative importance (RI) for BR, WWd, and MCW for the calf-crop system was 68.03%, 19.35%, and 12.62%, respectively. For the full-cycle system, the RI for BR, WWd, MCW, and CW were 69.63%, 7.31%, 5.01%, and 18.06%, respectively. For the stocking and finishing production system, the RI for WWd and CW was 34.20% and 65.80%, respectively. The Δ for the calf-crop system were US$6.12 and US$4.36, using the proposed economic and empirical indexes, respectively. Respective values were US$19.87 and US$18.22 for the full-cycle system and US$20.52 and US$18.52 in the stocking and finishing system. The efficiency of the proposed EI had low sensitivity to changes in the values of the economic and genetic parameters. The 3 EI generated higher Δ when using the proposed economic weight compared to the Δ provided by a PampaPlus index, suggesting the use of proposed EI to obtain greater economic profitability in relation to the current empirical PampaPlus index.
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Naya H, Peñagaricano F, Urioste JI. Modelling female fertility traits in beef cattle using linear and non-linear models. J Anim Breed Genet 2017; 134:202-212. [PMID: 28508488 DOI: 10.1111/jbg.12266] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Accepted: 02/07/2017] [Indexed: 11/29/2022]
Abstract
Female fertility traits are key components of the profitability of beef cattle production. However, these traits are difficult and expensive to measure, particularly under extensive pastoral conditions, and consequently, fertility records are in general scarce and somehow incomplete. Moreover, fertility traits are usually dominated by the effects of herd-year environment, and it is generally assumed that relatively small margins are kept for genetic improvement. New ways of modelling genetic variation in these traits are needed. Inspired in the methodological developments made by Prof. Daniel Gianola and co-workers, we assayed linear (Gaussian), Poisson, probit (threshold), censored Poisson and censored Gaussian models to three different kinds of endpoints, namely calving success (CS), number of days from first calving (CD) and number of failed oestrus (FE). For models involving FE and CS, non-linear models overperformed their linear counterparts. For models derived from CD, linear versions displayed better adjustment than the non-linear counterparts. Non-linear models showed consistently higher estimates of heritability and repeatability in all cases (h2 < 0.08 and r < 0.13, for linear models; h2 > 0.23 and r > 0.24, for non-linear models). While additive and permanent environment effects showed highly favourable correlations between all models (>0.789), consistency in selecting the 10% best sires showed important differences, mainly amongst the considered endpoints (FE, CS and CD). In consequence, endpoints should be considered as modelling different underlying genetic effects, with linear models more appropriate to describe CD and non-linear models better for FE and CS.
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Affiliation(s)
- H Naya
- Unidad de Bioinformática, Institut Pasteur de Montevideo, Montevideo, Uruguay.,Facultad de Agronomía, Universidad de la República, Montevideo, Uruguay
| | - F Peñagaricano
- Department of Animal Sciences, University of Florida, Gainesville, FL, USA.,University of Florida Genetics Institute, University of Florida, Gainesville, FL, USA
| | - J I Urioste
- Facultad de Agronomía, Universidad de la República, Montevideo, Uruguay
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Parra-Bracamonte GM, Lopez-Villalobos N, Morris ST, Sifuentes-Rincón AM, Lopez-Bustamante LA. Genetic trends for live weight traits reflect breeding strategies in registered Charolais Farms in Mexico. Trop Anim Health Prod 2016; 48:1729-1738. [PMID: 27696327 DOI: 10.1007/s11250-016-1150-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2015] [Accepted: 09/07/2016] [Indexed: 11/30/2022]
Abstract
Genetic trends are commonly used to verify genetic improvement; however, there are few reports on beef cattle in Mexico. Data from 1998 to 2013 from four Charolais bull breeding farms were examined to verify the genetic responses to different breeding management and selection criteria. Analysis included the comparison of regression lines of breeding values for birth (BW), weaning (WW) and yearling weights (YW), and maternal weaning weight (MWW) on the year of birth of the animals. Results revealed differential genetic progress for BW and YW and indicated that the overall analysis may have diluted the perception of genetic progress from the farmer's point of view. The use of breeding values as a tool for selection is effective to achieve genetic progress, even in negatively correlated traits, such as birth weight and yearling weight.
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Affiliation(s)
- G M Parra-Bracamonte
- Centro de Biotecnología Genómica (CBG), Instituto Politécnico Nacional (IPN), Boulevard del Maestro SN, Esq. Elías Piña, Col. Narciso Mendoza, Reynosa, 88710, Tamaulipas, Mexico.
| | - N Lopez-Villalobos
- Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Private Bag 11-222, Palmerston North, New Zealand
- Centro Universitario UAEM Temascaltepec, Universidad Autónoma del Estado de México, Km. 67.5 Carr. Fed. Toluca-Tejupilco, Temascaltepec, Estado de México, Mexico, C.P. 51300
| | - S T Morris
- Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Private Bag 11-222, Palmerston North, New Zealand
| | - A M Sifuentes-Rincón
- Centro de Biotecnología Genómica (CBG), Instituto Politécnico Nacional (IPN), Boulevard del Maestro SN, Esq. Elías Piña, Col. Narciso Mendoza, Reynosa, 88710, Tamaulipas, Mexico
| | - L A Lopez-Bustamante
- Charolais Herd-Book of Mexico - RON B Charolais Ranch, Hermosillo, Sonora, Mexico
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