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Article

Effects of genotype and mating weight on ovulation rate, litter size, and uterine efficiency of Coopworth, Polypay, and crossbred ewes.

Journal of animal science - 1 Oct 1991

Nawaz M, Meyer H H

Abstract excerpt

Six genotypes were produced by mating Coopworth (C), Polypay (P), and Suffolk (S) rams to Coopworth-type and Polypay ewes. In 1989, BW and ovulation rate (OR) were recorded for 188 naturally ovulating 5- and 6-yr-old ewes representing all six genotypes, and litter size (LS) was recorded for 174 ewes (93%) lambing to the ovulation observed by laparoscopy. Overall OR and LS averaged 1.85 and 1.71, respectively....

Topics

Analysis of Variance
Animals
Body Weight
Breeding
Crosses, Genetic
Female
Fertilization
Genotype
Hybrid Vigor
Least-Squares Analysis
Litter Size
Ovulation

Methodology Data sources Editorial policy Privacy About Contact Helena Bioinformatics

Pregnancy

Regression Analysis

Sheep

Uterus

Source

Identifiers

PMID: 1778803
DOI: 10.2527/1991.69103925x

Provenance

PubMed metadata and Literature Corpus relationships. Corpus snapshot updated 29 Aug 2026. Prepared record publication-1778803-2026-08-29.1. Manifest publication-graph-cohort-2026-08-29.1.

Source receipt: PubMed via Helena Literature Corpus, retrieved 29 Aug 2026.

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