Výsledky vyhledávání - "P.J. Boettcher"

Options and legal requirements for national and regional animal genetic resource collections

Publikováno v: Animal Genetic Resources/Ressources génétiques animales/Recursos genéticos animales. 47:91-100

La contraccion de los recursos zoogeneticos a escala mundial ha llevado a los paises a crear bancos de germoplasma como mecanismo para conservar los recursos nacionales. Los bancos de germoplasma deben establecer un conjunto de politicas que garantic

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4341ae4695bd8ea7f728fcb9ec2b3e81
https://doi.org/10.1017/s2078633610000998

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Current arrangements for national and regional conservation of animal genetic resources

Autor: P.J. Boettcher, Osman C. Akin

Publikováno v: Animal Genetic Resources/Ressources génétiques animales/Recursos genéticos animales. 47:73-83

Muchos paises han implementado la crioconservacion para ayudar a que se gestionen mejor sus recursos zoogeneticos (AnGR por sus siglas en ingles). Un banco de germoplasma compuesto de varios paises puede desempenar un papel relevante en el esfuerzo e

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::015dea4324c3b5b9e7814a85d28a2f7b
https://doi.org/10.1017/s2078633610000949

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Genotype × Environment Interaction for Grazing Versus Confinement. I. Production Traits

Autor: J.F. Kearney, Michael M Schutz, P.J. Boettcher, Kent A. Weigel

Publikováno v: Journal of dairy science 87 (2004): 501–509.
info:cnr-pdr/source/autori:Kearney J.F., Schutz M.M., Boettcher P.J., Weigel K.A./titolo:Genotype x environment interaction for grazing versus confinement. I. Production traits./doi:/rivista:Journal of dairy science/anno:2004/pagina_da:501/pagina_a:509/intervallo_pagine:501–509/volume:87

The objective of this study was to investigate the possible existence of a genotype x environment interaction (GxE) for production traits of US Holsteins in grazing versus confinement herds. Grazing herds were defined as those that utilized grazing f

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5090994a32e974fe2c2c9e65e837270b
https://doi.org/10.3168/jds.s0022-0302(04)73189-6

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Cytoplasmic and mitochondrial inheritance of economic traits in cattle

Autor: P.J. Boettcher, A.E. Freeman, John P. Gibson

Publikováno v: Livestock Production Science. 47:115-124

Bovine mitochondria contain a 16338 nucleotide closed loop of DNA coding for 13 translated genes, 22 tRNA and 2 rRNA and is inherited exclusively through the maternal line, providing a genetic mechanism for cytoplasmic inheritance. Several early anal

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3b4a7c4db6430f35e33be09aa95b6cdd
https://doi.org/10.1016/s0301-6226(96)00023-1

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Relationships Between Polymorphism for Mitochondrial Deoxyribonucleic Acid and Yield Traits of Holstein Cows

Autor: S.D. Johnston, Ben T. McDaniel, Donald C. Beitz, Renotta K. Smith, P.J. Boettcher, A.E. Freeman

Publikováno v: Journal of Dairy Science. 79:647-654

Two independent data files from the breeding herd of Iowa State University and six North Carolina herds were used to examine relationships between yield traits and mtDNA polymorphism. Maternal lineages were established by tracing ancestry of cows to

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d871c56f81af36d0e1245d3d50e5e9c8
https://doi.org/10.3168/jds.s0022-0302(96)76410-x

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Impacts of Cytoplasmic Inheritance on Genetic Evaluations

Autor: P.J. Boettcher, M.T. Kuhn, A.E. Freeman

Publikováno v: Journal of Dairy Science. 79:663-675

Simulation was used to examine the consequences of ignoring cytoplasmic effects on genetic evaluations. Effects on variance component estimation, accuracy of selection, genetic trend, and selection of bull-dams were considered. Comparisons were made

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c5c42dd620eefa5543f5cd3b9a60d1b6
https://doi.org/10.3168/jds.s0022-0302(96)76412-3

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Potential Biases in Predicted Transmitting Abilities of Females from Preferential Treatment

Autor: P.J. Boettcher, A.E. Freeman, M.T. Kuhn

Publikováno v: Journal of Dairy Science. 77:2428-2437

Data were simulated according to the USDA animal model to determine potential biases in female PTA from preferential treatment. Ten scenarios for preferential treatment were investigated. Scenarios were defined according to three factors: number of r

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::23347c93c0dce01a2ff5cd0b3622ee0c
https://doi.org/10.3168/jds.s0022-0302(94)77185-x

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Genotype x environment interaction for grazing vs. confinement. II. Health and reproduction traits

Autor: J.F. Kearney, P.J. Boettcher, Michael M Schutz

Publikováno v: Journal of dairy science 87 (2004): 510–516.
info:cnr-pdr/source/autori:Kearney J.F., Schutz M.M., Boettcher P.J./titolo:Genotype x environment interaction for grazing vs. confinement. II. Health and reproduction traits./doi:/rivista:Journal of dairy science/anno:2004/pagina_da:510/pagina_a:516/intervallo_pagine:510–516/volume:87

Continual selection for increased milk yield for more than 40 yr, combined with the antagonistic relationship between increasing yield, somatic cell count, and fertility, have resulted in sires that may not be optimal for producing daughters for graz

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e03d415b32c01c26a3c66f1b72e3fe86
https://pubmed.ncbi.nlm.nih.gov/14762094

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