ORIGINAL PAPER
Fertility measures in Polish Black-and-White cattle.
4. Phenotypic and genetic correlations between
fertility measures and type traits
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Agricultural University of Cracow, Department of Genetics and Animal Breeding,
Mickiewicza 24/28, 30-059 Kraków, Poland
Publication date: 2006-11-06
Corresponding author
W. Jagusiak
Agricultural University of Cracow, Department of Genetics and Animal Breeding,
Mickiewicza 24/28, 30-059 Kraków, Poland
J. Anim. Feed Sci. 2006;15(4):555-567
KEYWORDS
ABSTRACT
Phenotypic and genetic correlations between fertility measures and conformation traits were estimated.
Data were records of 38,274 cows; the records consisted of eight fertility traits, five descriptive type
traits, height and rump and fourteen linearly scored conformation traits. The correlations were estimated
using REML based on linear animal model. The phenotypic correlations between fertility and descriptive
type traits were in general low or close to zero. The largest were obtained for non-return rates with
central ligament (0.055), body depth (-0.066), chest width (-0.079) and rump width (-0.082). The genetic
correlations of age at first insemination and age at conception with descriptive type traits, height at rump,
and linearly scored udder traits were negative and ranged from -0.014 to -0.224. Age at first insemination
and age at conception correlated positively with rump width and chest width. The genetic correlations
between non-return rates and most of the conformation traits were low. The largest correlations between
descriptive type traits and interval fertility measures were obtained for conformation and dairy character
with service period (0.361) and days open (0.313). Among linearly scored type traits, large correlations
were found for rear udder height, udder width, and central ligament with service period and days open
(from 0.225 to 0.422). All interval traits showed negative correlations with fore udder attachment, and
small correlations with rump traits, body depth and chest width.
CITATIONS (1):
1.
Evaluation of gestation length and birth weight of offspring of Polish native cattle breeds in context of estimating genetic parameters
Anna Nienartowicz-Zdrojewska, Zbigniew Sobek, Jolanta Różańska-Zawieja
Czech Journal of Animal Science