Luteinizing hormone (LH) was measured in plasma samples collected at 15-rain intervals for 2 hr from 40 prepubertal Finn, Finn-cross (1/2), Rambouil let and Hampshire ewes at 9, 13 and 17 weeks of age and on Day 5 of the second estrous cycle after puberty. Blood samples were collected at 20-min intervals from 40 yearling and 20 mature ewes of the same breeds during anestrus and on Day 5 of the ...

Objective: The objective of this experiment was to measure the effects non-protein nitrogen (NPN; biuret) or NPN + ruminal modifier (biuret Bovatec, Zoetis, Parsippany, NJ) inclusion in a commercial mineral mix on growth performance yearling beef calves grazing Kansas Flint Hills.

Data were collected over a period of 4 yr from bulls and heifers of two location-breed groups (East Tennessee-Polled Hereford, Cumberland Plateau-Angus). Variables measured and recorded at the time all calves were weaned (at an average age of approximately 230 d) were age (in d at time of data collection; AGE), weight (WT), visual condition score (COND), ultrasonically measured subcutaneous fat...

Yearling morphometric measurements and variables related to career racing performance were collected on 260 Thoroughbreds to determine correlations between and among these traits. Morphometric measurements were adjusted to 365 days based on interpolation from adjacent age points and included wither and hip height, body length, distal limb length, cannon circumference, heartgirth circumference, ...

The aim of this study was to estimate genetic and phenotypic associations of growth traits with carcass and meat traits in Nellore cattle. Data from male and female animals were used for weaning weight (WW; N = 241,416), yearling weight (YW, N = 126,596), weight gain from weaning to yearling (GWY, N = 78,687), and yearling hip height (YHH, N = 90,720), respectively; 877 male animals were used f...

Reusing the data collected during an epidemiological study is a complex task. This is mainly due to the frequent utilization of traditional storage supports, as well as specific formats and/or terminologies which can make it difficult to integrate the gathered data with data from other information resources. Using terms from the UMLS Metathesaurus, we have annotated the data collected during th...

Field data on 4,233 yearling Hereford bulls were analyzed using fixed and mixed model least-squares procedures to examine factors affecting scrotal circumference; determine appropriate adjustment factors; and study genetic, environmental and phenotypic relationships among scrotal circumference and growth traits. Scrotal circumference was affected by postweaning feed level; contemporary group/fe...

An experiment involving crosses among selection and control lines was conducted to partition direct and maternal additive genetic response to 20 yr of selection for 1) weaning weight, 2) yearling weight, and 3) index of yearling weight and muscle score. Selection response was evaluated for efficiency of gain, growth from birth through market weight, and carcass characteristics. Heritability and...