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קהילה:
אסיף מאגר המחקר החקלאי
פותח על ידי קלירמאש פתרונות בע"מ -
Associations among milk yield, yield persistency, conception, and culling of Israeli Holstein dairy cattle.
Year:
1985
Source of publication :
Journal of Dairy Science
Authors :
בר-ענן, ראובן
;
.
רון, מיכה
;
.
Volume :
68
Co-Authors:
Bar-Anan, R.
Ron, M.
Wiggans, G.R.
Facilitators :
From page:
382
To page:
386
(
Total pages:
5
)
Abstract:
Genetic correlations among Predicted Differences for milk yield corrected for economic value of fat content, annualized yield, yield persistency, conception rate, and culling rate were estimated. Correlations were .43 between yield persistency and annualized yield, .42 between yield persistency and conception rate, and .1 between annualized yield and conception rate. For Predicted Differences for these traits computed separately for each of first three parities, correlations between pairs were highest for annualized yield and lowest for culling rate. Regression coefficients for conception rate from cow insemination records on daily yield preceding insemination and on absolute change of yield during month of insemination were significantly negative for the first three parities. A positive pleiotropic effect for yield, yield persistency, and conception rate was suggested; therefore, progeny testing for yield persistency may improve yield and conception rate. High yields and large changes of yield during month of insemination adversely affected conception rate of cows within herds.
Note:
Related Files :
Animal
article
breeding
cattle
Female
Genetics
Israel
milk
Models, Biological
parity
pregnancy
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
20469
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:36
Scientific Publication
Associations among milk yield, yield persistency, conception, and culling of Israeli Holstein dairy cattle.
68
Bar-Anan, R.
Ron, M.
Wiggans, G.R.
Associations among milk yield, yield persistency, conception, and culling of Israeli Holstein dairy cattle.
Genetic correlations among Predicted Differences for milk yield corrected for economic value of fat content, annualized yield, yield persistency, conception rate, and culling rate were estimated. Correlations were .43 between yield persistency and annualized yield, .42 between yield persistency and conception rate, and .1 between annualized yield and conception rate. For Predicted Differences for these traits computed separately for each of first three parities, correlations between pairs were highest for annualized yield and lowest for culling rate. Regression coefficients for conception rate from cow insemination records on daily yield preceding insemination and on absolute change of yield during month of insemination were significantly negative for the first three parities. A positive pleiotropic effect for yield, yield persistency, and conception rate was suggested; therefore, progeny testing for yield persistency may improve yield and conception rate. High yields and large changes of yield during month of insemination adversely affected conception rate of cows within herds.
Scientific Publication
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