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Articles 1 - 9 of 9
Full-Text Articles in Dairy Science
The Investigation Of Novel Bovine Oocyte-Specific Long Non-Coding Rnas And Their Roles In Oocyte Maturation And Early Embryonic Development, Jaelyn Zoe Current
The Investigation Of Novel Bovine Oocyte-Specific Long Non-Coding Rnas And Their Roles In Oocyte Maturation And Early Embryonic Development, Jaelyn Zoe Current
Graduate Theses, Dissertations, and Problem Reports
Early embryonic loss is a significant factor in livestock species' infertility, resulting in an economic deficit. In cattle, the in vivo fertilization rate is ~90%, with an average calving rate of about 55%, indicating an embryonic-fetal mortality rate of roughly 35%. Further, 70-80% of total embryonic loss in cattle occurs during the first three weeks after insemination, particularly between days 7-16. Growing evidence indicates that the oocyte plays an active role in regulating critical aspects of the reproductive process required for successful fertilization, embryo development, and pregnancy. However, defining oocyte quality remains enigmatic. Recently, many have abandoned the notion that …
Relación Entre La Grasa Subcutánea Y Desempeño Maternal En Vacas Angus Primerizas, Esteban Mendoza De La Pava, Adel David Kalil Rey
Relación Entre La Grasa Subcutánea Y Desempeño Maternal En Vacas Angus Primerizas, Esteban Mendoza De La Pava, Adel David Kalil Rey
Zootecnia
El objetivo del presente estudio, tuvo como finalidad lograr identificar el porcentaje de grasa dorsal que se moviliza en vacas Angus primerizas posterior al parto y cómo este podría verse relacionado con el desempeño maternal y el peso al destete del ternero. Para poder lograr este objetivo, se evaluaron doce vacas primerizas de la raza Angus del CIC (centro de investigación y capacitación) San Miguel en Facatativá, Cundinamarca, con diversos parámetros productivos como: peso corporal, puntaje de condición corporal del preparto y al destete, espesor de grasa dorsal (preparto y destete), espesor de grasa en el anca (preparto y destete), …
The Effect Of Bovine Galectin-1, A Conceptus Secretory Protein, On The Endometrial Transcriptome, Lindsay Faye Grose
The Effect Of Bovine Galectin-1, A Conceptus Secretory Protein, On The Endometrial Transcriptome, Lindsay Faye Grose
Graduate Theses, Dissertations, and Problem Reports
Early embryonic loss in cattle is detrimental to reproduction thus, the profitability of both the beef and dairy industries. Therefore, an important aspect of study is to find techniques that beef or dairy producers could use to decrease early embryonic loss Galectin-1, the protein that was investigated in this research is important in modulating the maternal immune system in rodent and human early pregnancies by promoting fetomaternal immune tolerance. The role of galectin-1 within the reproductive tissues has not been thoroughly investigated in cattle. Galectin-1 is located in the caruncular and intercaruncular regions of the bovine endometrium, specifically the maternal …
Comparación Del Porcentaje De Preñez Y Días Abiertos En Vacas Holstein Con Inseminación Artificial A Tiempo Fijo Vs Inseminación Artificial A Celo Detectado, Laura Cristina Barco Santamaría
Comparación Del Porcentaje De Preñez Y Días Abiertos En Vacas Holstein Con Inseminación Artificial A Tiempo Fijo Vs Inseminación Artificial A Celo Detectado, Laura Cristina Barco Santamaría
Zootecnia
No abstract provided.
Estimación De Parámetros Genéticos Para Características De Producción Considerando Índices De Temperatura - Humedad En Bovinos Ayrshire De Colombia, Manuel Pérez Rivera
Estimación De Parámetros Genéticos Para Características De Producción Considerando Índices De Temperatura - Humedad En Bovinos Ayrshire De Colombia, Manuel Pérez Rivera
Zootecnia
El objetivo de este estudio fue la estimación de parámetros genéticos de producción considerando el Índice de temperatura humedad (ITH), en bovinos de la raza Ayrshire en Colombia, para lo cual se utilizaron 10492 registros de producción de leche pertenecientes a 2247 vacas Ayrshire. Se estimaron las varianzas ITH, heredabilidad, y proporción de la varianza fenotípica explicada por la variación del ITH mediante un modelo de regresión aleatoria con el programa Wombat. Los resultados muestran una alta variación genética en el primer tercio de lactancia indicando una fuerte influencia del estrés calórico en esta etapa de la lactancia, la heredabilidad …
Low Cost, Multi-Purpose Genotyping Panels For Dairy And Beef Cattle, Michelle Judge
Low Cost, Multi-Purpose Genotyping Panels For Dairy And Beef Cattle, Michelle Judge
Theses
rhe selection of animals based on DNA has revolutionised animal breeding, but the associated high cost of obtaining genotypes has limited its uptake. The objective of this thesis was to develop a low-cost, low-density, multi-purpose genotyping panel for the procurement of reliable genotype information, and to quantify the long-term consequences of using such low-density genotype panels in breeding programs. The objectives were achieved through a combination of real-life cattle genotype data and simulations to mimic a cattle population. The in-silico development of genotype panels was based on actual genotypes from up to 58,705 beef cattle. Alternative novel strategies were used …
Genetic Resistance To Staphylococcus Aureus Mastitis Associated With Bovine Cxcr1, Olivia Jean Crisp
Genetic Resistance To Staphylococcus Aureus Mastitis Associated With Bovine Cxcr1, Olivia Jean Crisp
Chancellor’s Honors Program Projects
No abstract provided.
Sire Evaluation For Milking Duration, James Macedo
Sire Evaluation For Milking Duration, James Macedo
Dairy Science
The objective of this study was to utilize electronically recorded data from on-farm milk recording systems and herd management software to determine if a sire has a genetic influence on his daughter’s milking duration. Measurements of milking duration from three dairy facilities were taken between January 27, 2013 and January 31, 2013. These measurements supplied 25,070 observations, corresponding to 9,418 cows and 895 sires. These data were evaluated with a SAS alongside a herd-mate comparison. The statistical analysis demonstrated that a sire does have a genetic influence on the milking duration of his progeny. The Van Beek Brothers and Dairyland …
Selecting, Marketing And Rebuilding A Herd Of Genetically Superior Animals, Katherine Rector
Selecting, Marketing And Rebuilding A Herd Of Genetically Superior Animals, Katherine Rector
Dairy Science
No abstract provided.