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Titolo:
Genetic and economic analysis of introgression the B allele of the FecB (Booroola) gene into the Awassi and Assaf dairy breeds
Autore:
Gootwine, E; Zenu, A; Bor, A; Yossafi, S; Rosov, A; Pollott, GE;
Indirizzi:
Agr Res Org, Volcani Ctr, IL-50250 Bet Dagan, Israel Agr Res Org Bet Dagan Israel IL-50250 ni Ctr, IL-50250 Bet Dagan, Israel Univ London Imperial Coll Sci Technol & Med, Ashford TN25 5AH, Kent, England Univ London Imperial Coll Sci Technol & Med Ashford Kent England TN25 5AH
Titolo Testata:
LIVESTOCK PRODUCTION SCIENCE
fascicolo: 1, volume: 71, anno: 2001,
pagine: 49 - 58
SICI:
0301-6226(200109)71:1<49:GAEAOI>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
REPRODUCTIVE-PERFORMANCE; MILK-PRODUCTION; LACTATION; CROSSES; SHEEP;
Keywords:
Awassi; Assaf; Booroola; Afec; dairy sheep; economic analysis;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
19
Recensione:
Indirizzi per estratti:
Indirizzo: Gootwine, E Agr Res Org, Volcani Ctr, POB 6, IL-50250 Bet Dagan, Israel Agr Res Org POB 6 Bet Dagan Israel IL-50250 Bet Dagan, Israel
Citazione:
E. Gootwine et al., "Genetic and economic analysis of introgression the B allele of the FecB (Booroola) gene into the Awassi and Assaf dairy breeds", LIVEST PROD, 71(1), 2001, pp. 49-58

Abstract

Selection for yield and the adoption of an intensive management system underpins the high milk production of the Improved Awassi and the Assaf dairy flocks in Israel. However, lamb production, which contributes some 40% of the income, remains relatively low at 1.2 and 1.6 lambs born/ewe lambing (LB/EL) for the Awassi and the Assaf, respectively. To increase the profitability, through improved lamb production, a breeding scheme was initiated in 1986 to introduce the B allele of the FecB (Booroola) gene to the Awassi andAssaf breeds. This led to the formation of the Afec-Awassi and Afec-Assaf strains with prolificacy of about 2.0 LB/EL, A marker assisted selection approach and the use of induced ovulation rate as selection criteria were incorporated into the breeding programs. The Awassi is the main type of sheep in the Middle East where about 80 million sheep of this breed and other related fat tail breeds are present. Distribution of the BB Afec semen or ramsin those flocks, through regional breeding programs, can improve their productivity and their economics, facilitating the transition into a more intensive production system. The economic justification for launching such a breeding program depends mainly on the local lamb price. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/01/20 alle ore 16:43:05