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 Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Terrill, C. E. Articles by Hazel, L. N. Search for Related Content PubMed Articles by Terrill, C. E. Articles by Hazel, L. N.

Heritability of Face Covering and Neck Folds in Range Rambouillet Lambs as Evaluated by Scoring

United States Department of Agriculture¹

Abstract

Estimates of heritability of face covering and neck folds as evaluated by scoring were calculated from data on 2183 weanling Rambouillet lambs born in 1941 and 1942 and 892 dam-offspring pairs. Two breeding methods had been followed consisting of inbred lines and top crosses. Estimates based on daughter-dam regressions and half-sib correlations were calculated for each year and breeding method, making eight individual estimates for each trait.

Average heritability estimates of 0.56 ± 0.05 for face covering and 0.39 ± 0.05 for neck folds were obtained. No significant differences were found between estimates for years, breeding methods or methods of estimation. Significant variations between inbred lines were found for each trait.

The interpretation of these estimates of heritability in relation to the populations from which they were obtained and their application to breed-ing programs are discussed.

¹ Western Sheep Breeding Labratory, Dubois, Idaho.