Genetic parameters for residual energy intake and energy conversion efficiency in Nordic Red dairy cattle

Autor:	Martin Lidauer, Päivi Mäntysaari, Anna-Elisa Liinamo, Esa Mäntysaari
Rok vydání:	2015
Předmět:	Energy conversion efficiency Repeatability Heritability Biology Genetic correlation medicine.anatomical_structure Animal science Food Animals Lactation medicine Animal Science and Zoology Dry matter Residual energy Dairy cattle
Zdroj:	Acta Agriculturae Scandinavica, Section A — Animal Science. 65:63-72
ISSN:	1651-1972 0906-4702
DOI:	10.1080/09064702.2015.1070897
Popis:	Our aim was to estimate the genetic parameters of residual energy intake (REI) and energy conversion efficiency (ECE), and their relationships with milk, feed intake and body weight (BW) and condition in Nordic Red dairy cattle with data from 400 animals. These data were analysed with repeatability and random regression models. The highest heritabilities for energy efficiency traits were obtained in the beginning and the end of the 30 week lactation period (0.21–0.40). The results suggest that the energy efficiencies in early- and mid-lactation periods are partially different traits. The genetic correlations of REI were moderate to high and positive with the other studied traits, and high and positive for ECE with milk, but moderate to low and negative with dry matter intake, BW and body condition score. Further improvements are still needed in modelling the energy efficiency traits of cows during lactation.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7e9973755f93d9a8cb49926a7144f380 https://doi.org/10.1080/09064702.2015.1070897 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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