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Permanent link (DOI): https://doi.org/10.7939/R3SM53

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Effects of dietary starch on ovarian physiology, intra-follicular milieu of the preovulatory follicle, and plasma metabolites in postpartum dairy cows Open Access

Descriptions

Other title
Subject/Keyword
Starch
Dairy cattle -- Feeding and feeds
Dairy cattle -- Reproduction
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Subramaniam, Elango
Supervisor and department
Ambrose, Divakar (Agricultural, Food and Nutritional Science)
Examining committee member and department
Oba, Masahito (Agricultural, Food and Nutritional Science)
Chang, John (Biological Sciences)
Dyck, Michael (Agricultural, Food and Nutritional Science)
Department
Department of Agricultural, Food, and Nutritional Science
Specialization

Date accepted
2011-09-30T20:57:40Z
Graduation date
2011-11
Degree
Master of Science
Degree level
Master's
Abstract
Effects of dietary starch content on ovarian dynamics in lactating dairy cows and intrafollicular milieu of preovulatory follicles were studied. Diets containing two levels of starch (29.2% and 19.1%) were fed until 84 d post-calving. Diets had no effect on the interval from calving-to-ovulation, but a greater proportion of cows on high starch diet ovulated two or more follicles at first ovulation. Cows consuming a high starch diet had higher concentrations of insulin in plasma, IGF-1 in follicular fluid, and lower concentrations of non-esterified fatty acids (NEFA) in both plasma and follicular fluid. Primiparous cows had higher concentrations of IGF-1 and NEFA, and lower concentrations of urea in plasma than multiparous cows. Reproductive hormones and gene expression in granulosa cells were affected neither by diet nor parity. Although a high starch diet increased insulin and IGF-1, and reduced NEFA, it did not hasten resumption of cyclicity in postpartum dairy cows.
Language
English
DOI
doi:10.7939/R3SM53
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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