Zobrazeno 1 - 10
of 101
pro vyhledávání: '"W. Jagusiak"'
Autor:
Z.M. Kowalski, M. Sabatowicz, R.J. Van Saun, W. Młocek, W. Jagusiak, M. Spanghero, C.D. Dechow
Publikováno v:
Journal of Dairy Science, Vol 106, Iss 12, Pp 9532-9551 (2023)
ABSTRACT: Study aims were to investigate associations of hyperketolactia (HYKL) status of Holstein dairy cows between 6 and 60 d in milk (DIM), defined by milk acetone (mACE) and β-hydroxybutyrate (mBHB) content, with daily milk yield and compositio
Externí odkaz:
https://doaj.org/article/63f6dd3d9fb245cab7350217a4cc3fdb
Publikováno v:
Animal, Vol 17, Iss 6, Pp 100816- (2023)
New traits are sought to add in breeding goals to prevent worsening health and fertility of Polish Holstein-Friesian cows. The objectives of this study were to estimate genetic parameters for body condition score (BCS) and locomotion (LOC) and their
Externí odkaz:
https://doaj.org/article/c5dac4cbb044455da7509d6005d9bf4b
Publikováno v:
Animal, Vol 15, Iss 6, Pp 100238- (2021)
The objective of this study was to describe the population structure and inbreeding level of the population of Polish Red Cattle (PRC). The structure of the breed was analysed in the context of the existing genetic resources conservation programme. T
Externí odkaz:
https://doaj.org/article/99de76556e0e4f2e8ae81344aab0b2e5
Publikováno v:
Animal, Vol 15, Iss 5, Pp 100204- (2021)
Taking into account functional traits in the breeding practice should lead to a longer productive life of cows. However, despite the increased contribution of these traits in bull selection indices, their daughters are frequently culled as early as t
Externí odkaz:
https://doaj.org/article/c5d1034994bb446fb0472f3b50bd93ef
Publikováno v:
Animal, Vol 11, Iss 2, Pp 327-334 (2017)
Cow longevity and lifetime performance traits are good indicators of breeding effectiveness and animal welfare. They are also interrelated with the economics of dairy herd. Unfortunately, a high milk yield is often associated with deteriorated cow he
Externí odkaz:
https://doaj.org/article/34484c66a0f84037b0cbd7684a8d8707
Publikováno v:
Czech Journal of Animal Science, Vol 61, Iss 2, Pp 75-81 (2016)
The objective of this study was to find genetic relationships between lactation persistency and conformation traits of Polish Holstein-Friesian cows. The data were derived from SYMLEK - the Polish National Database. The analysis used 22 conformation
Externí odkaz:
https://doaj.org/article/17d7728867eb47b995db8a4c151c1a9d
Genetic correlations between type traits of young Polish Holstein-Friesian bulls and their daughters
Publikováno v:
Czech Journal of Animal Science, Vol 60, Iss 2, Pp 75-80 (2015)
The objective of this study was to evaluate the usefulness of young bulls' conformation scores in a national type evaluation system. For this purpose the genetic correlations between conformation traits of sires and the same type traits of their daug
Externí odkaz:
https://doaj.org/article/313b037118d745caabb6e94a9afe5f18
Publikováno v:
Czech Journal of Animal Science, Vol 56, Iss 5, Pp 205-212 (2011)
The objective of this study was to estimate heritabilities and genetic correlations of lactational and daily somatic cell scores with descriptive and linear type traits in Polish Holstein-Friesian cows. Data were: test-day somatic cell scores and con
Externí odkaz:
https://doaj.org/article/fc7686757ec64bdb9f288fbdb1db4afd
Autor:
H. Wierzbicki, W. Jagusiak
Publikováno v:
Czech Journal of Animal Science, Vol 51, Iss 1, Pp 39-46 (2006)
5 540 records of the arctic fox fur coat and reproductive traits collected in 1983-1999 were studied. The analyzed traits were: body size (BS), colour type (CT), colour purity (CP), coat density (CD), hair length (HL), general appearance (GA), total
Externí odkaz:
https://doaj.org/article/667035c6b314422a91e092868181d044
Publikováno v:
Czech Journal of Animal Science, Vol 49, Iss 1, Pp 16-27 (2004)
Three data sets were available: records on conformation and coat traits for the arctic fox from one farm (5 540 observations, collected between 1983 and 1997), and the same traits for the silver fox from three farms (8 199 observations, collected bet
Externí odkaz:
https://doaj.org/article/c998814af77e435583ff8dd105080a49