HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Eltawil, E. A. Articles by Terrill, C. E. Search for Related Content PubMed PubMed Citation Articles by Eltawil, E. A. Articles by Terrill, C. E.

Evaluation of Environmental Factors Affecting Birth, Weaning and Yearling Traits in Navajo Sheep¹

Iowa State University, Ames and U.S.D.A.

Abstract

Twelve years of data on 3,264 lambs in three breeding groups of Navajo and Navajo cross-bred sheep developed at the Southwestern Range and Sheep Breeding Laboratory, Fort Wingate, New Mexico, were analyzed. Year, breeding-group, age of dam, type of birth and rearing, sex, age and lamb's birth weight, affected significantly all weaning and yearling traits with minor exceptions. Type of birth and rearing, age of dam, and breeding-group were most influential on weaning traits; sex and year of birth greatly affected yearling traits. Regression of weaning weight on birth weight was 2.45±.11.

¹ Ph.D. Thesis (1965), Iowa State University, Ames.

² Present address: Faculty of Agriculture, Ain-Shams University Cairo, U.A.R.

³ Sheep and Fur Animal Research Branch, A.R.S., Beltsville, Maryland.