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Genotypic Expression With Different Ages Of Dams: Iii. Weight Traits Of Sheep, H. Okut, C. M. Bromley, L. Dale Van Vleck, G. D. Snowder
Genotypic Expression With Different Ages Of Dams: Iii. Weight Traits Of Sheep, H. Okut, C. M. Bromley, L. Dale Van Vleck, G. D. Snowder
Department of Animal Science: Faculty Publications
Correlations between genetic expression in lambs when dams were young (1 yr), middle-aged (2 and 3 yr), or older (older than 3 yr) were estimated with three-trait analyses for weight traits. Weights at birth ( BWT) and weaning ( WWT) and ADG from birth to weaning were used. Numbers of observations were 7,731, 9,518, 9,512, and 9,201 for Columbia ( COLU) , Polypay ( POLY) , Rambouillet ( RAMB) , and Targhee ( TARG) breeds of sheep, respectively. When averaged, relative estimates for WWT and ADG were similar across breeds. Estimates were variable across breeds. On average, direct heritability was …
Genotypic Expression At Different Ages: Ii. Wool Traits Of Sheep, H. Okut, C. M. Bromley, L. Dale Van Vleck, G. D. Snowder
Genotypic Expression At Different Ages: Ii. Wool Traits Of Sheep, H. Okut, C. M. Bromley, L. Dale Van Vleck, G. D. Snowder
Department of Animal Science: Faculty Publications
Genetic parameters for wool traits for Columbia, Polypay, Rambouillet, and Targhee breeds of sheep were estimated with single- and multiple-trait analyses using REML with animal models. Traits considered were fleece grade, fleece weight, and staple length. Total number of observations ranged from 11,673 to 34,746 for fleece grade and fleece weight and from 3,500 to 11,641 for staple length for the four breeds. For single-trait analyses, data were divided by age of ewe: young ages (age of 1 yr), middle ages (ages of 2 and 3 yr), and older ages (age greater than 3 yr). Heritability estimates averaged over breeds …
Genotypic Expression At Different Ages: I. Prolificacy Traits Of Sheep, H. Okut, C. M. Bromley, L. Dale Van Vleck, G. D. Snowder
Genotypic Expression At Different Ages: I. Prolificacy Traits Of Sheep, H. Okut, C. M. Bromley, L. Dale Van Vleck, G. D. Snowder
Department of Animal Science: Faculty Publications
Genetic parameters for prolificacy traits for Columbia (COLU), Polypay (POLY), Rambouillet (RAMB), and Targhee (TARG) breeds of sheep were estimated with REML using animal models. Traits were number of live births (LAB), litter size at birth (LSB) and weaning (LSW), and litter weight weaned (LWW). Numbers of observations ranged from 5,140 to 7,095 for prolificacy traits and from 5,101 to 8,973 for litter weight weaned for the four breeds. For single-trait analyses, ewes were classified as young (1 yr old), middle-aged (2 and 3 yr old), or older (> 3 yr old). After single-trait analyses, three-trait analyses were done for …