Pub Date : 2018-08-20DOI: 10.1080/09064702.2018.1493137
M. Wetten, T. Aasmundstad, O. Vangen
ABSTRACT Norwegian Elkhound Grey is used for both leashed and non-leashed tracking. This study provides influence of fixed effects and estimates of genetic parameters of traits related to both types of tracks. In total, 5393 records from 1991 animals tested in the years 1995–2014 on lashed performance (5 traits), and 5405 records from 2070 animals tested in the years 2005–2014 on non-leashed performance (10 traits) were included in the dataset. The pedigree file contained 8623 animals. Heritabilities were generally low for the non-leashed traits and a bit higher for the leashed traits. Genetic correlations within trait group were very highly positive for the leashed dog traits, but variable among some traits in the non-leashed group. Genetic correlations between performance traits in the two groups were generally negative and unfavourable. Genetic trends were generally positive for the time periods.
{"title":"Genetic analyses of hunting traits in leashed and non-leashed test systems in Norwegian Elkhound","authors":"M. Wetten, T. Aasmundstad, O. Vangen","doi":"10.1080/09064702.2018.1493137","DOIUrl":"https://doi.org/10.1080/09064702.2018.1493137","url":null,"abstract":"ABSTRACT Norwegian Elkhound Grey is used for both leashed and non-leashed tracking. This study provides influence of fixed effects and estimates of genetic parameters of traits related to both types of tracks. In total, 5393 records from 1991 animals tested in the years 1995–2014 on lashed performance (5 traits), and 5405 records from 2070 animals tested in the years 2005–2014 on non-leashed performance (10 traits) were included in the dataset. The pedigree file contained 8623 animals. Heritabilities were generally low for the non-leashed traits and a bit higher for the leashed traits. Genetic correlations within trait group were very highly positive for the leashed dog traits, but variable among some traits in the non-leashed group. Genetic correlations between performance traits in the two groups were generally negative and unfavourable. Genetic trends were generally positive for the time periods.","PeriodicalId":35885,"journal":{"name":"Acta Agriculturae Scandinavica Section A-Animal Science","volume":"98 1","pages":"101 - 108"},"PeriodicalIF":0.9,"publicationDate":"2018-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81136570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ABSTRACT The fox (Vulpes vulpes fulva) and raccoon dog (Nyctereutes procyonoides) are important farmed fur animals, but information on their intestinal microbiota is not known. In this study, the fecal microbiota of the fox and raccoon dog were thus analyzed. Total DNA was extracted from fecal samples, and the v4 16S rRNA gene amplicons were characterized on an Illumina MiSeq platform. A total of 1433 operational taxonomical units (OTUs) belonging to 18 bacterial phyla were identified. The most predominant phyla, Bacteroidetes, Firmicutes, Proteobacteria and Actinobacteria, were identified as the core microbiota, which was consistent with findings from other canids, such as the dog, wolf and dhole. Prevotella and Megasphaera were the major genera in both fox and raccoon dog. Even though the composition and ratio of genera varied between these two canids, their fecal microbial communities were similar to each other.
{"title":"Assessment of fecal microbiota in farmed silver fox (Vulpes vulpes fulva) and raccoon dog (Nyctereutes procyonoides)","authors":"Yongjia Peng, Zhao-xing Zhang, Hongqiang Li, Shuncai Li, Qiumei Shi, Jin Zhang","doi":"10.1080/09064702.2019.1637451","DOIUrl":"https://doi.org/10.1080/09064702.2019.1637451","url":null,"abstract":"ABSTRACT The fox (Vulpes vulpes fulva) and raccoon dog (Nyctereutes procyonoides) are important farmed fur animals, but information on their intestinal microbiota is not known. In this study, the fecal microbiota of the fox and raccoon dog were thus analyzed. Total DNA was extracted from fecal samples, and the v4 16S rRNA gene amplicons were characterized on an Illumina MiSeq platform. A total of 1433 operational taxonomical units (OTUs) belonging to 18 bacterial phyla were identified. The most predominant phyla, Bacteroidetes, Firmicutes, Proteobacteria and Actinobacteria, were identified as the core microbiota, which was consistent with findings from other canids, such as the dog, wolf and dhole. Prevotella and Megasphaera were the major genera in both fox and raccoon dog. Even though the composition and ratio of genera varied between these two canids, their fecal microbial communities were similar to each other.","PeriodicalId":35885,"journal":{"name":"Acta Agriculturae Scandinavica Section A-Animal Science","volume":"17 1","pages":"142 - 151"},"PeriodicalIF":0.9,"publicationDate":"2018-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82404586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-07-03DOI: 10.1080/09064702.2019.1648546
M. Domínguez-Muñoz, José Armando Guerra-Puga, Hossana Guadalupe Berrones-Morales, R. López-Zavala, J. Salinas-Chavira
ABSTRACT Eighteen beef cows with their calves were assigned to 3 groups considering body conditions scores at calving (BCSC): T1 (high BCSC, maintained throughout the study); T2 (low BCSC, increased during the study); and T3 (low BCSC, maintained throughout). An estrus synchronization protocol was implemented, with fixed time artificial insemination on day 70. Follicular or luteal growth, and pregnancy rate were similar between groups. Of all cows, five showed multiple ovulations (2–6); increasing number of ovulations reduced preovulatory follicle diameter and individual luteal volume (P < 0.05), but total luteal volume was greater in cows with 2 or 3 ovulations on day 14 after insemination (P < 0.05). Estradiol and progesterone levels were associated to follicular and luteal growth, respectively. No difference was found in IGF1 or GDF9 levels between groups or associated to fertility. No association was found between BCS, IGF1 or GDF9 levels and the reproductive process.
{"title":"Effects of body condition and supplementation on ovarian function, growth factors and response to estrus synchronization in postpartum beef cows in Tamaulipas, Mexico","authors":"M. Domínguez-Muñoz, José Armando Guerra-Puga, Hossana Guadalupe Berrones-Morales, R. López-Zavala, J. Salinas-Chavira","doi":"10.1080/09064702.2019.1648546","DOIUrl":"https://doi.org/10.1080/09064702.2019.1648546","url":null,"abstract":"ABSTRACT Eighteen beef cows with their calves were assigned to 3 groups considering body conditions scores at calving (BCSC): T1 (high BCSC, maintained throughout the study); T2 (low BCSC, increased during the study); and T3 (low BCSC, maintained throughout). An estrus synchronization protocol was implemented, with fixed time artificial insemination on day 70. Follicular or luteal growth, and pregnancy rate were similar between groups. Of all cows, five showed multiple ovulations (2–6); increasing number of ovulations reduced preovulatory follicle diameter and individual luteal volume (P < 0.05), but total luteal volume was greater in cows with 2 or 3 ovulations on day 14 after insemination (P < 0.05). Estradiol and progesterone levels were associated to follicular and luteal growth, respectively. No difference was found in IGF1 or GDF9 levels between groups or associated to fertility. No association was found between BCS, IGF1 or GDF9 levels and the reproductive process.","PeriodicalId":35885,"journal":{"name":"Acta Agriculturae Scandinavica Section A-Animal Science","volume":"59 1","pages":"124 - 133"},"PeriodicalIF":0.9,"publicationDate":"2018-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79641381","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-07-03DOI: 10.1080/09064702.2019.1627406
T. Skjerve, L. Grøva, L. K. Sørheim, M. Slagboom, S. Eriksson, M. Kargo, A. Wallenbeck
ABSTRACT The aims of this study were to investigate variation and clustering in breeding goal trait preferences among Norwegian dairy farmers and to identify factors with a systematic influence on their preferences. An internet-based questionnaire was sent out to dairy farmers connected to the Norwegian co-operative breeding organization Geno (N = 8222), of which 10.8% answered (N = 888). Of the 15 suggested traits fertility had the highest overall ranking, while parasite resistance and methane emission had the lowest. Four distinct preference clusters were identified by the means of cluster analysis, of which two had a high preference for milk production. Differences in terms of farm and herd characteristics between clusters suggests a mixture of systematic and intrinsic effects on breeding goal trait priorities. This study shows that Norwegian dairy farmers’ preferences for breeding goal traits fall into four distinct clusters, both affected by herd and farm characteristics along with intrinsic values.
{"title":"Norwegian dairy farmers’ preferences for breeding goal traits and associations with herd and farm characteristics","authors":"T. Skjerve, L. Grøva, L. K. Sørheim, M. Slagboom, S. Eriksson, M. Kargo, A. Wallenbeck","doi":"10.1080/09064702.2019.1627406","DOIUrl":"https://doi.org/10.1080/09064702.2019.1627406","url":null,"abstract":"ABSTRACT The aims of this study were to investigate variation and clustering in breeding goal trait preferences among Norwegian dairy farmers and to identify factors with a systematic influence on their preferences. An internet-based questionnaire was sent out to dairy farmers connected to the Norwegian co-operative breeding organization Geno (N = 8222), of which 10.8% answered (N = 888). Of the 15 suggested traits fertility had the highest overall ranking, while parasite resistance and methane emission had the lowest. Four distinct preference clusters were identified by the means of cluster analysis, of which two had a high preference for milk production. Differences in terms of farm and herd characteristics between clusters suggests a mixture of systematic and intrinsic effects on breeding goal trait priorities. This study shows that Norwegian dairy farmers’ preferences for breeding goal traits fall into four distinct clusters, both affected by herd and farm characteristics along with intrinsic values.","PeriodicalId":35885,"journal":{"name":"Acta Agriculturae Scandinavica Section A-Animal Science","volume":"216 1","pages":"117 - 123"},"PeriodicalIF":0.9,"publicationDate":"2018-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73202050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-07-03DOI: 10.1080/09064702.2019.1657175
M. Presto Åkerfeldt, L. Göransson
ABSTRACT In two trials, 358 female and entire male pigs vaccinated against boar taint (YxH) were single-phase-fed with diets that were planned to contain 0.78 g standardized ileal digestible (SID) lysine/MJ net energy and 14.5 g SID CP/g SID lysine. A reference diet with soya bean meal (SBM) as the protein feed ingredient, was replaced with either cereal by-products (CBP), rapeseed meal (RSM), faba beans (FB) or mixtures of 50% CBP and 50% RSM (CBP + RSM) or 50% FB and 50% RSM (FB + RSM) in the experimental diets. Treatments had no effect (P > 0.05) on daily weight gain, feed efficiency, carcass weight, lean meat content or dressing percentage and carcass value. Single-phase-fed pigs on diets with local protein ingredients can perform as well as single-phase-fed pigs on diets with soya bean meal, and CBP, RSM, FB have the potential to replace soya bean meal in nutritionally well-balanced diets to growing-finishing pigs.
{"title":"Effects of using locally produced protein feed ingredients in low protein diets to single-phase-fed growing-finishing pigs","authors":"M. Presto Åkerfeldt, L. Göransson","doi":"10.1080/09064702.2019.1657175","DOIUrl":"https://doi.org/10.1080/09064702.2019.1657175","url":null,"abstract":"ABSTRACT In two trials, 358 female and entire male pigs vaccinated against boar taint (YxH) were single-phase-fed with diets that were planned to contain 0.78 g standardized ileal digestible (SID) lysine/MJ net energy and 14.5 g SID CP/g SID lysine. A reference diet with soya bean meal (SBM) as the protein feed ingredient, was replaced with either cereal by-products (CBP), rapeseed meal (RSM), faba beans (FB) or mixtures of 50% CBP and 50% RSM (CBP + RSM) or 50% FB and 50% RSM (FB + RSM) in the experimental diets. Treatments had no effect (P > 0.05) on daily weight gain, feed efficiency, carcass weight, lean meat content or dressing percentage and carcass value. Single-phase-fed pigs on diets with local protein ingredients can perform as well as single-phase-fed pigs on diets with soya bean meal, and CBP, RSM, FB have the potential to replace soya bean meal in nutritionally well-balanced diets to growing-finishing pigs.","PeriodicalId":35885,"journal":{"name":"Acta Agriculturae Scandinavica Section A-Animal Science","volume":"27 1","pages":"134 - 141"},"PeriodicalIF":0.9,"publicationDate":"2018-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80894419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-07-03DOI: 10.1080/09064702.2019.1611913
M. Horváth, L. Babinszky
ABSTRACT The aim of this review was to discuss the effects of heat stress on antioxidant status and performance in poultry. Based on the recent literature data, the following conclusions can be drawn: (1) Heat stress can cause harmful effects in birds (e.g. increased ROS (Reactive Oxygen Spices) production and lipid peroxidation, decreased vitamin concentrations, changed enzyme activity) and consequently in production parameters (e.g. feed intake, body weight and feed conversion ratio). (2) Diets containing high Vitamin A (9000–15 000 IU/kg diet), E (150–500 mg/kg diet), C (150–500 mg/kg diet) and Zn (30/60 mg/kg diet) and Se (0.1–1 mg/kg diet) can decrease the amounts of free radicals, support enzyme activity and prevent lipid peroxidation in poultry. (3) Application of antioxidant vitamins and micro minerals in poultry nutrition is more effective in combination than separately.
{"title":"Impact of selected antioxidant vitamins (Vitamin A, E and C) and micro minerals (Zn, Se) on the antioxidant status and performance under high environmental temperature in poultry. A review","authors":"M. Horváth, L. Babinszky","doi":"10.1080/09064702.2019.1611913","DOIUrl":"https://doi.org/10.1080/09064702.2019.1611913","url":null,"abstract":"ABSTRACT The aim of this review was to discuss the effects of heat stress on antioxidant status and performance in poultry. Based on the recent literature data, the following conclusions can be drawn: (1) Heat stress can cause harmful effects in birds (e.g. increased ROS (Reactive Oxygen Spices) production and lipid peroxidation, decreased vitamin concentrations, changed enzyme activity) and consequently in production parameters (e.g. feed intake, body weight and feed conversion ratio). (2) Diets containing high Vitamin A (9000–15 000 IU/kg diet), E (150–500 mg/kg diet), C (150–500 mg/kg diet) and Zn (30/60 mg/kg diet) and Se (0.1–1 mg/kg diet) can decrease the amounts of free radicals, support enzyme activity and prevent lipid peroxidation in poultry. (3) Application of antioxidant vitamins and micro minerals in poultry nutrition is more effective in combination than separately.","PeriodicalId":35885,"journal":{"name":"Acta Agriculturae Scandinavica Section A-Animal Science","volume":"41 1","pages":"152 - 160"},"PeriodicalIF":0.9,"publicationDate":"2018-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82510519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-04-03DOI: 10.1080/09064702.2019.1601763
J. R. E. Johanssen, K. Sørheim, T. Strøm, E. Brunberg
ABSTRACT The aim of this project was to compare the hygienic quality of the bedding, as well as the parasitic load, cleanliness and lying behaviour in heifers kept on either straw or wood chip deep bedding. Fourteen heifers kept in two pens were housed on straw or wood chip bedding for 43 days, after which the bedding material was switched for 43 additional days. Significantly more mould was found in wood chip than in straw and there was a tendency towards less yeast in wood chip. The heifers had a low faecal parasitic load. The results indicate that the wood chip treatment resulted in somewhat cleaner animals. The heifers had a significantly longer total lying time when kept on straw. In conclusion, wood chip deep bedding could be an option as bedding material, but the impact on hygiene of bedding material and lying behaviour needs to be further investigated.
{"title":"Bedding hygiene, cleanliness and lying behaviour for heifers housed on wood chip or straw deep bedding","authors":"J. R. E. Johanssen, K. Sørheim, T. Strøm, E. Brunberg","doi":"10.1080/09064702.2019.1601763","DOIUrl":"https://doi.org/10.1080/09064702.2019.1601763","url":null,"abstract":"ABSTRACT The aim of this project was to compare the hygienic quality of the bedding, as well as the parasitic load, cleanliness and lying behaviour in heifers kept on either straw or wood chip deep bedding. Fourteen heifers kept in two pens were housed on straw or wood chip bedding for 43 days, after which the bedding material was switched for 43 additional days. Significantly more mould was found in wood chip than in straw and there was a tendency towards less yeast in wood chip. The heifers had a low faecal parasitic load. The results indicate that the wood chip treatment resulted in somewhat cleaner animals. The heifers had a significantly longer total lying time when kept on straw. In conclusion, wood chip deep bedding could be an option as bedding material, but the impact on hygiene of bedding material and lying behaviour needs to be further investigated.","PeriodicalId":35885,"journal":{"name":"Acta Agriculturae Scandinavica Section A-Animal Science","volume":"37 1","pages":"103 - 111"},"PeriodicalIF":0.9,"publicationDate":"2018-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90742608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-04-03DOI: 10.1080/09064702.2019.1611912
W. T. Wang, Dongjie Zhang, Ziguang Liu, Fugang Peng, Liang Wang, Fu Bo, Saihui Wu, Zhong-qiu Li, Zhenhua Guo, Di Liu
ABSTRACT Min pigs and Large White pigs are two breeds that vary significantly in thickness of adipose tissue. In this study, transcriptome profiling was used to examine the fat tissues of both breeds. Min pig compared to Large White pig, 523 DEGs were down-regulated, and 112 DEGs were up-regulated. The DEGs were significantly enriched in biological process of oxidoreductase activity; helicase activity and others. In cellular component, DEGs were enriched in intracellular. In molecular function, DEGs were enriched in cytoskeletal protein binding and ion binding. Although there were many DEGs between Min pigs and Large White pigs, no significant pathway was enriched surprisingly. ATP6V0A4, TAP2, FGFBP1, PHEROA and GLYATL2 were expressed significantly higher in Large White pigs. These results suggest that the gene expression pattern in the back fat tissue was different between Large White pigs and Min pigs.
{"title":"Identification of differentially expressed genes in adipose tissue of min pig and large white pig using RNA-seq","authors":"W. T. Wang, Dongjie Zhang, Ziguang Liu, Fugang Peng, Liang Wang, Fu Bo, Saihui Wu, Zhong-qiu Li, Zhenhua Guo, Di Liu","doi":"10.1080/09064702.2019.1611912","DOIUrl":"https://doi.org/10.1080/09064702.2019.1611912","url":null,"abstract":"ABSTRACT Min pigs and Large White pigs are two breeds that vary significantly in thickness of adipose tissue. In this study, transcriptome profiling was used to examine the fat tissues of both breeds. Min pig compared to Large White pig, 523 DEGs were down-regulated, and 112 DEGs were up-regulated. The DEGs were significantly enriched in biological process of oxidoreductase activity; helicase activity and others. In cellular component, DEGs were enriched in intracellular. In molecular function, DEGs were enriched in cytoskeletal protein binding and ion binding. Although there were many DEGs between Min pigs and Large White pigs, no significant pathway was enriched surprisingly. ATP6V0A4, TAP2, FGFBP1, PHEROA and GLYATL2 were expressed significantly higher in Large White pigs. These results suggest that the gene expression pattern in the back fat tissue was different between Large White pigs and Min pigs.","PeriodicalId":35885,"journal":{"name":"Acta Agriculturae Scandinavica Section A-Animal Science","volume":"10 1","pages":"73 - 80"},"PeriodicalIF":0.9,"publicationDate":"2018-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87774326","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-04-03DOI: 10.1080/09064702.2019.1580308
L. Freitas, R. Savegnago, N. V. Grupioni, S. B. Ramos, N. B. Stafuzza, E. Figueiredo, G. S. Schmidt, M. Ledur, D. P. Munari
ABSTRACT The aims of this study were to compare the suitability of the multi-trait (MUT) model to estimate genetic parameters with that of 13 reduced-rank principal component models (PC1 to PC13), and then to explore the additive genetic patterns of the breeding values obtained from these using clustering analyses of egg production traits. A total of 1,212 records were used to estimate genetic parameters using the MUT and PC models. The PC4 model was the best representation of the data since it had a lower AIC value and was more parsimonious than the MUT model. The estimated heritability of the age at the first egg (AFE) trait from this model was 0.28 ± 0.06, and the estimated genetic correlation between AFE and total egg production (TP) was −0.52 ± 0.23. Potentially animals from cluster 2 are more likely to be in the selected group to help improve the egg production.
{"title":"Reduced-rank estimation of genetic parameters for egg production traits and cluster analyses with predicted breeding values","authors":"L. Freitas, R. Savegnago, N. V. Grupioni, S. B. Ramos, N. B. Stafuzza, E. Figueiredo, G. S. Schmidt, M. Ledur, D. P. Munari","doi":"10.1080/09064702.2019.1580308","DOIUrl":"https://doi.org/10.1080/09064702.2019.1580308","url":null,"abstract":"ABSTRACT The aims of this study were to compare the suitability of the multi-trait (MUT) model to estimate genetic parameters with that of 13 reduced-rank principal component models (PC1 to PC13), and then to explore the additive genetic patterns of the breeding values obtained from these using clustering analyses of egg production traits. A total of 1,212 records were used to estimate genetic parameters using the MUT and PC models. The PC4 model was the best representation of the data since it had a lower AIC value and was more parsimonious than the MUT model. The estimated heritability of the age at the first egg (AFE) trait from this model was 0.28 ± 0.06, and the estimated genetic correlation between AFE and total egg production (TP) was −0.52 ± 0.23. Potentially animals from cluster 2 are more likely to be in the selected group to help improve the egg production.","PeriodicalId":35885,"journal":{"name":"Acta Agriculturae Scandinavica Section A-Animal Science","volume":"29 1","pages":"81 - 86"},"PeriodicalIF":0.9,"publicationDate":"2018-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85919063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-04-03DOI: 10.1080/09064702.2018.1563211
E. Todd, K. Jäderkvist Fegraeus, P. Thomson, C. Ihler, E. Strand, G. Lindgren, B. Velie
ABSTRACT Norwegian-Swedish Coldblooded Trotters can participate in premie races as two year olds, where prize money is awarded for finishing the race within a specific time interval rather than winning. In this study, the association with premie race participation and future competitive racing success was evaluated. Analyses including all raced horses born between 2000 and 2009 (n = 9350) showed a relationship between premie race participation with reduced career longevity and prize money earnings. However, when analyses only included horses that raced competitively (n = 7497; i.e. horses with participation in only premie or qualification races were excluded), premie race participation was associated with increased racing success. These findings indicate that premie race fields consist of both horses with good racing ability as well as horses with limited talent. Overall this study shows that premie racing is likely to be beneficial for both the horse and the trainer.
{"title":"Premie race participation is associated with increased career longevity and prize money earnings in Norwegian-Swedish Coldblooded Trotters","authors":"E. Todd, K. Jäderkvist Fegraeus, P. Thomson, C. Ihler, E. Strand, G. Lindgren, B. Velie","doi":"10.1080/09064702.2018.1563211","DOIUrl":"https://doi.org/10.1080/09064702.2018.1563211","url":null,"abstract":"ABSTRACT Norwegian-Swedish Coldblooded Trotters can participate in premie races as two year olds, where prize money is awarded for finishing the race within a specific time interval rather than winning. In this study, the association with premie race participation and future competitive racing success was evaluated. Analyses including all raced horses born between 2000 and 2009 (n = 9350) showed a relationship between premie race participation with reduced career longevity and prize money earnings. However, when analyses only included horses that raced competitively (n = 7497; i.e. horses with participation in only premie or qualification races were excluded), premie race participation was associated with increased racing success. These findings indicate that premie race fields consist of both horses with good racing ability as well as horses with limited talent. Overall this study shows that premie racing is likely to be beneficial for both the horse and the trainer.","PeriodicalId":35885,"journal":{"name":"Acta Agriculturae Scandinavica Section A-Animal Science","volume":"35 1","pages":"112 - 116"},"PeriodicalIF":0.9,"publicationDate":"2018-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88435531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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