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Reproductive performance and milk production of the improved Awassi breed as compared with its crosses with the Booroola Merino
Year:
1995
Source of publication :
Animal Science
Authors :
Braw-Tal, Ruth
;
.
Gootwine, Elisha
;
.
Zenou, Abraham
;
.
Volume :
60
Co-Authors:
Gootwine, E., Institute of Animal Science, Agricultural Research Organization, The Volcani Center, FOB 6, Bet Dagan 50250, Israel
Bor, A., Institute of Animal Science, Agricultural Research Organization, The Volcani Center, FOB 6, Bet Dagan 50250, Israel
Braw-Tal, R., Institute of Animal Science, Agricultural Research Organization, The Volcani Center, FOB 6, Bet Dagan 50250, Israel
Zenou, A., Institute of Animal Science, Agricultural Research Organization, The Volcani Center, FOB 6, Bet Dagan 50250, Israel
Facilitators :
From page:
109
To page:
115
(
Total pages:
7
)
Abstract:
Ovulation rate, embryo survival, lamb production, lamb survival and milk production of Awassi and BooroolaAwassi crossbred ewes, kept indoors, were compared. Awassi were non-carriers while Booroola × Awassi (F1) and about half of 3/4 Awassi-1/4 Booroola (BQ) ewes were heterozygous at the FecB gene. Mean ovulation rate increased by 1·5 to 1·6 corpora lutea per ewe ovulating and prolificacy by 0·7 lambs born per ewe lambing in Fj and BC1 (B+) ewes as compared with Awassi. Embryo survival rates in BC1 ewes with two, three and four ovulations were 0·83, 0·68 and 0·71, respectively. Lamb survival rates at 1 day of age were 0·93, 0·90 and 0·77 and average birth weight was 4·9, 4·0 and 3·0 kg for lambs born as singles, twins and triplets, respectively. Average milk production of the Awassi was 506 I per ewe per lactation. F1 and BC1 ewes produced respectively, proportionately 0·48 and 0·63 of the Awassi milk production and there was no significant difference in milk production between BC1,(B+) and BC1(++) ewes. The relatively low milk production of the Booroola Awassi crosses suggests that heterosis and recombination effects on milk production were negative. It is concluded that incorporation of the B allele per se can increase lamb production in the Awassi without affecting its milk production. © 1995, British Society of Animal Science. All rights reserved.
Note:
Related Files :
Awassi
Booroola
Milk production
reproductive performance
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Related Content
More details
DOI :
10.1017/S1357729800008201
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
21089
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:41
Scientific Publication
Reproductive performance and milk production of the improved Awassi breed as compared with its crosses with the Booroola Merino
60
Gootwine, E., Institute of Animal Science, Agricultural Research Organization, The Volcani Center, FOB 6, Bet Dagan 50250, Israel
Bor, A., Institute of Animal Science, Agricultural Research Organization, The Volcani Center, FOB 6, Bet Dagan 50250, Israel
Braw-Tal, R., Institute of Animal Science, Agricultural Research Organization, The Volcani Center, FOB 6, Bet Dagan 50250, Israel
Zenou, A., Institute of Animal Science, Agricultural Research Organization, The Volcani Center, FOB 6, Bet Dagan 50250, Israel
Reproductive performance and milk production of the improved Awassi breed as compared with its crosses with the Booroola Merino
Ovulation rate, embryo survival, lamb production, lamb survival and milk production of Awassi and BooroolaAwassi crossbred ewes, kept indoors, were compared. Awassi were non-carriers while Booroola × Awassi (F1) and about half of 3/4 Awassi-1/4 Booroola (BQ) ewes were heterozygous at the FecB gene. Mean ovulation rate increased by 1·5 to 1·6 corpora lutea per ewe ovulating and prolificacy by 0·7 lambs born per ewe lambing in Fj and BC1 (B+) ewes as compared with Awassi. Embryo survival rates in BC1 ewes with two, three and four ovulations were 0·83, 0·68 and 0·71, respectively. Lamb survival rates at 1 day of age were 0·93, 0·90 and 0·77 and average birth weight was 4·9, 4·0 and 3·0 kg for lambs born as singles, twins and triplets, respectively. Average milk production of the Awassi was 506 I per ewe per lactation. F1 and BC1 ewes produced respectively, proportionately 0·48 and 0·63 of the Awassi milk production and there was no significant difference in milk production between BC1,(B+) and BC1(++) ewes. The relatively low milk production of the Booroola Awassi crosses suggests that heterosis and recombination effects on milk production were negative. It is concluded that incorporation of the B allele per se can increase lamb production in the Awassi without affecting its milk production. © 1995, British Society of Animal Science. All rights reserved.
Scientific Publication
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