Selection of foreign sires involves risk when genetic values for breeding goal traits are unknown. Information to support objective selection decisions concerning foreign sires are confined to the information from Interbull=s routine evaluations for production and conformation traits. Functional traits are associated with efficiency of production by their direct influence on costs of production...

Conformation scores can account for more than 20% of cattle price variation at Australian livestock sales. However, there are limited available references which define genetic factors relating objective live developmental traits to carcass composition. Weaning and post-weaning weight, height, length, girth, muscle (ratio of stifle to hip width) and fat depth of 1202 progeny from mature Hereford...

The aim was to estimate the genetic correlations between residual feed intake (RFI) and dry matter (DMI) with carcass finish (CF), rib eye area (REA), marbling (MAR) of Nellore cattle. Data from 7,808 animals were considered. In addition, data 2,261 females included in complete database also Estimates variance covariance components, as well heritabilities obtained by means two-character analysi...

Linear type scoring is key component in decision making process the herd, as it focusses on selection of animals with higher productive potential based their body conformation/linear traits. The present study was carried out 150 lactating Sahiwal cattle first to fifth parity. Measurements linear traits were recorded 1 h before evening milking at three different stages lactation. average score p...

Changes in maintenance energy requirements and in feed efficiency have been achieved by divergent selection for heat loss in mice in 3 replicates, creating high heat loss, high maintenance (MH) and low heat loss, low maintenance (ML) lines and an unselected control (MC). However, feed intake has mainly been measured in mature animals and not during growth or reproduction. Additionally, there is...

Global demand for food has been projected to increase 70% by 2050 in order to support a growing population that is becoming more urbanized and affluent. As disposable incomes increase in developing countries, people will elect to include more animal-protein foods in their diet. This rising demand for animal protein will require a concomitant increase in the supply of cereal grains as well as pr...

Horse conformation has been proposed as an indirect indicator of performance, since their genetic correlations are often positive and high. In Pura Raza Español (PRE) horses, the selection traits more related to functionality performance allows a pre-selection animals contributes towards saving costs increasing progress. The aim this paper is evaluate predictability 16 (14 body measurements 2 l...