Journal cover Journal topic
Archives Animal Breeding Archiv Tierzucht
Journal topic

Journal metrics

IF value: 0.991
IF0.991
IF 5-year value: 1.217
IF 5-year
1.217
CiteScore value: 2.0
CiteScore
2.0
SNIP value: 1.055
SNIP1.055
IPP value: 1.27
IPP1.27
SJR value: 0.425
SJR0.425
Scimago H <br class='widget-line-break'>index value: 28
Scimago H
index
28
h5-index value: 13
h5-index13
Supported by
Logo Leibniz Institute for Farm Animal Biology Logo Leibniz Association
Volume 43, issue 2
Arch. Anim. Breed., 43, 115–122, 2000
https://doi.org/10.5194/aab-43-115-2000
© Author(s) 2000. This work is distributed under
the Creative Commons Attribution 3.0 License.
Arch. Anim. Breed., 43, 115–122, 2000
https://doi.org/10.5194/aab-43-115-2000
© Author(s) 2000. This work is distributed under
the Creative Commons Attribution 3.0 License.

  10 Oct 2000

10 Oct 2000

A comparison of different methods of estimating sire transmitting ability of some milk traits in a herd of Holstein Friesian cattle

H. Atil1 and A. S. Khattab2 H. Atil and A. S. Khattab
  • 1Ege University, Faculty of Agriculture, Animal Sciences Dept., Bomova, Izmir, Turkey
  • 2Tanta University, Faculty of Agriculture, Animal Production Dept., Tanta, Egypt

Abstract. A total of 1931 normal first lactation records of Holstein Friesian cows kept at Dena Farm in Egypt during the period from 1987 to 1994 were used to estimate phenotypic and genetic parameters for 90 day milk yield (90 dMY), 305 day milk yield (305 dMY) and lactation period (LP). In addition, 76 bulls with at least ten daughters were used to compare three methods of sire transmitting ability.

A least Squares analysis of variance show significant effect of month and year of calving and age at first calving for different traits studied, except the effect of age at first calving on LP.

Heritability estimates for 90 dMY, 305 dMY and LP were 0.39 ± 0.08, 0.27 ± 0.07 and 0.14 ± 0.05, respectively. Genetic and phenotypic correlations between different traits were positive and significant.

Sires with at least ten daughters were evaluated by best linear unbiased prediction (BLUP), least Squares means (LSM) and regression of the future daughters mean on the present daughters mean. The product moment correlations between different traits studied were positive and high (= 0.96).

Download
Citation