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United States Department of Agriculture (USDA) 2012

Improving the Efficiency of Sheep Production in Western Rangeland Production Systems

Sheep Production Rangelands

United States Department of Agriculture (USDA) Research, Education & Economics Information System (REEIS)

Titre : Improving the Efficiency of Sheep Production in Western Rangeland Production Systems

Identification : 2056-31000-011-00

Pays : Etats Unis

Durée : Oct 08, 2012 à Oct 07, 2017

Objectif
This location will focus on the following objectives over the next five years.
Objective 1 : Enhance the understanding of control points during the first 24 months of a ewe’s life to improve reproductive efficiency and lifetime production, and develop methods for managing these critical control points to optimize production efficiencies in range sheep flocks. Subobjective 1.A : Quantify relationships among age at puberty of Targhee ewe lambs, ability of Targhee ewes to lamb at 1 year of age, and scrotal circumference of Targhee ram lambs from weaning until approximately 8 months of age, and quantify the response to EBV-based selection strategies on the ability of ewes to lamb at 1 year of age. Subobjective 1.B : Describe the dose-response effects of subacute sodium chlorate exposure on ewe and lamb health and fecal Escherichia coli concentrations, and bactericidal efficacy of chlorate naturally secreted in milk.
Objective 2 : Evaluate germplasm, selection criteria, and mating systems to improve maternal and paternal genetic lines of sheep to best match western rangeland environments and industry targets for reproductive efficiency, growth, feed/forage efficiencies and meat quality. Subobjective 2.A : Evaluate Polypay, Rambouillet, and 1/4 Romanov × 1/4 White Dorper × 1/2 Rambouillet ewes for lifetime production in a western rangeland, terminal crossbreeding system. Subobjective 2.B : Develop and evaluate a white-faced, composite, paternal genetic line of sheep adapted to extensive rangeland management systems.

Présentation : USDA

Page publiée le 6 novembre 2015, mise à jour le 15 novembre 2017