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פותח על ידי קלירמאש פתרונות בע"מ -
Sire and maternal grandsire effects on calving difficulty and calf mortality in Israeli Holsteins.
Year:
1986
Source of publication :
Journal of Dairy Science
Authors :
בר-ענן, ראובן
;
.
ולר, יהודה
;
.
רון, מיכה
;
.
Volume :
69
Co-Authors:
Ron, M.
Bar-Anan, R.
Weller, J.I.
Facilitators :
From page:
243
To page:
247
(
Total pages:
5
)
Abstract:
Associations among sire and maternal grandsire evaluations for calving difficulty and calf mortality were investigated in the Israeli Holstein population. Primiparous and multiparous calvings were analysed separately. Genetic correlations between calving difficulty and calf mortality were close to unity for primiparous calvings but lower for multiparous calvings. Genetic correlations between primiparous and multiparous sire evaluations were .94 and .72 for calving difficulty and calf mortality. Genetic correlations between sire and maternal grandsire evaluations were .6 for primiparous calvings and not-significant for multiparous calvings for both traits. These results correspond to findings that the direct genetic effect is larger than the maternal effect but that there is a slight negative correlation between them. We suggest that sire evaluations for calving difficulty of multiparous cows be used as a preliminary prediction of heifer calving difficulty and calf mortality and that the separate calving trait evaluations be combined into an overall calving selection index.
Note:
Related Files :
Animal
cattle
Female
Genetics
labor complication
pregnancy
Reproduction
species difference
Species Specificity
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
25544
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:15
Scientific Publication
Sire and maternal grandsire effects on calving difficulty and calf mortality in Israeli Holsteins.
69
Ron, M.
Bar-Anan, R.
Weller, J.I.
Sire and maternal grandsire effects on calving difficulty and calf mortality in Israeli Holsteins.
Associations among sire and maternal grandsire evaluations for calving difficulty and calf mortality were investigated in the Israeli Holstein population. Primiparous and multiparous calvings were analysed separately. Genetic correlations between calving difficulty and calf mortality were close to unity for primiparous calvings but lower for multiparous calvings. Genetic correlations between primiparous and multiparous sire evaluations were .94 and .72 for calving difficulty and calf mortality. Genetic correlations between sire and maternal grandsire evaluations were .6 for primiparous calvings and not-significant for multiparous calvings for both traits. These results correspond to findings that the direct genetic effect is larger than the maternal effect but that there is a slight negative correlation between them. We suggest that sire evaluations for calving difficulty of multiparous cows be used as a preliminary prediction of heifer calving difficulty and calf mortality and that the separate calving trait evaluations be combined into an overall calving selection index.
Scientific Publication
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