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Genetic evaluation of dairy goat does for milk and fat as an extension of buck evaluation.
Year:
1987
Source of publication :
Journal of Dairy Science
Authors :
Weller, Joel Ira
;
.
Volume :
70
Co-Authors:
Weller, J.I.
Wiggans, G.R.
Lawlor Jr., T.J.
Facilitators :
From page:
681
To page:
686
(
Total pages:
6
)
Abstract:
The current procedure for calculating genetic evaluations of dairy goat bucks provides easily accessible information for constructing genetic evaluations for dairy goat does (doe indexes). Relationships among sires are accounted for by using the additive genetic relationship matrix among sires if the doe's sire was evaluated. The sire evaluation plus a portion of residual doe effect is the basis of doe evaluation. Although direct incorporation of maternal relationships among does may be accomplished, it requires extensive computations for large data sets. An approximate procedure based on selection index principles includes information from a doe's dam with only a modest increase in computing expense over that for genetic evaluations of bucks. Doe indexes were computed and adjusted to separate breed bases. Trend in doe indexes was positive for all breeds and ranged from .54 to 1.37 kg/yr for milk yield and from .021 to .052 kg/yr for fat yield.
Note:
Related Files :
Animal
Female
Genetics
Goat
goats
lactation
Male
milk
pregnancy
Selection (Genetics)
species difference
Show More
Related Content
More details
DOI :
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
29370
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:46
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Scientific Publication
Genetic evaluation of dairy goat does for milk and fat as an extension of buck evaluation.
70
Weller, J.I.
Wiggans, G.R.
Lawlor Jr., T.J.
Genetic evaluation of dairy goat does for milk and fat as an extension of buck evaluation.
The current procedure for calculating genetic evaluations of dairy goat bucks provides easily accessible information for constructing genetic evaluations for dairy goat does (doe indexes). Relationships among sires are accounted for by using the additive genetic relationship matrix among sires if the doe's sire was evaluated. The sire evaluation plus a portion of residual doe effect is the basis of doe evaluation. Although direct incorporation of maternal relationships among does may be accomplished, it requires extensive computations for large data sets. An approximate procedure based on selection index principles includes information from a doe's dam with only a modest increase in computing expense over that for genetic evaluations of bucks. Doe indexes were computed and adjusted to separate breed bases. Trend in doe indexes was positive for all breeds and ranged from .54 to 1.37 kg/yr for milk yield and from .021 to .052 kg/yr for fat yield.
Scientific Publication
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