Show simple item record

dc.contributor.advisorCasas-Guernica, Américo
dc.contributor.authorLugo-Ruíz, Mariné
dc.date.accessioned2019-08-12T15:36:11Z
dc.date.available2019-08-12T15:36:11Z
dc.date.issued2019-07-10
dc.identifier.urihttps://hdl.handle.net/20.500.11801/2499
dc.description.abstractSenepol and Senepol crossbred genotypes have become some of the main beef cattle used in Puerto Rico. However, few studies have evaluated their reproductive efficiency on the island and their merit in breeding programs. The objective was to evaluate the reproductive efficiency of purebred Senepol and Senepol x Charbray crossbred cows by comparing pregnancy, calving and weaning rates along with calving, and weaning weight as well as weight loss during the pre-weaning period. Results showed that purebred Senepol cows performed as well as crossbred cows for pregnancy, calving and weaning rates. No significant differences were seen between the weight of cows at calving or at weaning for any of the genotypes. The lack of differences between the Senepol and the crossbred cattle suggest that the adaptation of the Senepol breed to tropical environments, and the intense selection on maternal traits, allows them to perform as well as crossbred genotypes.en_US
dc.description.abstractEl ganado Senepol y sus cruzas están entre las razas más comúnmente utilizadas para la producción de carne en Puerto Rico. Sin embargo, existen pocos estudios evaluando su eficiencia reproductiva en el trópico y su aportación a programas de cruzamiento. El propósito de este estudio fue evaluar la eficiencia de vacas Senepol puras con vacas cruzas de Senepol con Charbray, comparando las variables de por ciento de preñez, parto y destete, pesos al parto y al destete, junto con su pérdida de peso durante el periodo de lactancia. Los resultados mostraron que las vacas Senepol se desempeñaron de igual manera que las cruzas en cuanto al porciento de preñez, parto, y destete. Además, no se encontraron diferencias significativas entre ninguno de los genotipos en cuestión de peso de las vacas al parto y al destete. La falta de diferencias significativas entre el desempeño de las vacas Senepol y los genotipos cruzados demuestra que la adaptación al trópico de la raza Senepol, y la selección intensa que se realiza sobre sus características maternales, les permite desempeñarse al mismo nivel.en_US
dc.language.isoenen_US
dc.subjectSenepolen_US
dc.subjectCharbrayen_US
dc.subjectReproductive efficiencyen_US
dc.subjectBeef cattleen_US
dc.subjectHeterosisen_US
dc.subject.lcshSenepol --Cattle -- Breeding -- Puerto Ricoen_US
dc.subject.lcshCattle -- Geneticsen_US
dc.subject.lcshCattle -- Breeding -- Puerto Ricoen_US
dc.subject.lcshBeef cattle -- Breeding -- Puerto Ricoen_US
dc.titleA comparison of the reproductive efficiency of Senepol, and Charbray crossed cows and the pre-weaning growth of their progenyen_US
dc.typeThesisen_US
dc.rights.holder(c) 2019 Mariné Lugo Ruízen_US
dc.contributor.committeeGregory Crespo, Alexandra
dc.contributor.committeeSánchez Rodríguez, Héctor L.
dc.contributor.committeeDomenech Pérez, Katherine I.
dc.contributor.representativeZapata Medina, Rocío
thesis.degree.levelM.S.en_US
thesis.degree.disciplineAnimal Industryen_US
dc.contributor.collegeCollege of Agricultural Sciencesen_US
dc.contributor.departmentDepartment of Animal Scienceen_US
dc.description.graduationSemesterSummeren_US
dc.description.graduationYear2019en_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

  • Theses & Dissertations
    Items included under this collection are theses, dissertations, and project reports submitted as a requirement for completing a degree at UPR-Mayagüez.

Show simple item record

(c) 2019 Mariné Lugo Ruíz
Except where otherwise noted, this item's license is described as All Rights Reserved