Genetic trends for growth, feed efficiency, composition, and morphometry of carcasses were estimated in a French Large White (LW) pig population using frozen semen. Two groups of pigs were produced by inseminating LW sows with either stored, frozen semen from 17 LW boars born in 1977 or with semen from 23 LW boars born in 1998. In each group, 15 males and 90 females were randomly chosen and mat...

Abstract Madura cattle in the Sonok area are classified into Sonok, Taccek , and Conventional. Meanwhile, selection of with high economic value is expected to support environmentally friendly livestock production. Therefore, this study aims identify candidate genes associated traits for Cattle area. An in-silico was employed using data retrieved from published studies obtain a list that have be...

Effects of nano-selenium (nano-Se) and stocking density (SD) on growth performance, carcass yield, meat quality, feathering score broilers were investigated in this study. One-day-old 480 broiler chickens (45.32.4 g body weight) (Ross 308) randomly divided into 4 treatments each comprising 8 replicates. In the experiment, consisted a 2  factorial arrangement dietary Se form (inorganic or nano...

SUMMARY Breeding objectives are largely determined by market tropics, the overall breeding objective can be considered in reproductive rate, carcass quality, adaptation and temperament. a simple efficient se:ection trait. Reas~ns why potential increas .. size are not as d1sadvantageous as 1n temperate areas are Reproductive performance has been less important in harsh environments because of th...

9 The objectives of this study were to estimate variance components, genetic 10 parameters, EBV, accuracies, and rankings for nine ultrasound and carcass traits in a 11 multibreed Angus-Brahman population using three genomic-polygenic models and one 12 polygenic model (PM). The genomic-polygenic models used the complete GeneSeek 13 GPF250k SNP set (GPM), top 5% SNP (GPMR1), and 5% SNP evenly sp...

The developments in Norwegian sheep breeding since the early 1990s are reviewed. For the largest breeding population, the Norwegian White Sheep, results are presented for both genetic and phenotypic changes. Of the nine traits that make up the aggregate genotype, the largest gain per year, in per cent of the corresponding phenotypic average, was found for carcass grade (1.66%) and carcass weigh...

Data from an F 2 cross between breeds of livestock are typically analysed by least squares line-cross or half-sib models to detect quantitative trait loci (QTL) that differ between or segregate within breeds. These models can also be combined to increase power to detect QTL, while maintaining the computational efficiency of least squares. Tests between models allow QTL to be characterized into ...

The objective of this study was to estimate genetic correlations between calving difficulty score and carcass traits in Charolais and Hereford cattle, treating first and later parity calvings as different traits. Genetic correlations between birth weight and carcass traits were also estimated. Field data on 59,182 Charolais and 27,051 Hereford calvings, and carcass traits of 5,260 Charolais and...