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Titolo:
Responses to restricted index selection and genetic parameters for fat androstenone level and sexual maturity status of young boars
Autore:
Sellier, P; Le Roy, P; Fouilloux, MN; Gruand, J; Bonneau, M;
Indirizzi:
INRA, Genet Quantitat & Appl Stn, F-78350 Jouy En Josas, France INRA JouyEn Josas France F-78350 ppl Stn, F-78350 Jouy En Josas, France Stn Expt Select Porcine, F-86480 Rouille, France Stn Expt Select Porcine Rouille France F-86480 , F-86480 Rouille, France INRA, Rech Porcines Stn, F-35590 Hermitage, France INRA Hermitage FranceF-35590 ch Porcines Stn, F-35590 Hermitage, France
Titolo Testata:
LIVESTOCK PRODUCTION SCIENCE
fascicolo: 3, volume: 63, anno: 2000,
pagine: 265 - 274
SICI:
0301-6226(20000501)63:3<265:RTRISA>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
CORRELATED RESPONSE; OVULATION RATE; TRAITS; TAINT; SWINE; MEAT; 5-ALPHA-ANDROST-16-EN-3-ONE; TESTOSTERONE; PUBERTY; WEIGHT;
Keywords:
pig; intact male; fat androstenone level; sexual maturity; selection experiment;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Sellier, P INRA, Genet Quantitat & Appl Stn, F-78350 Jouy En Josas, FranceINRA Jouy En Josas France F-78350 78350 Jouy En Josas, France
Citazione:
P. Sellier et al., "Responses to restricted index selection and genetic parameters for fat androstenone level and sexual maturity status of young boars", LIVEST PROD, 63(3), 2000, pp. 265-274

Abstract

A restricted index selection experiment was conducted over four generations in order to investigate whether it is possible to reduce fat androstenone(AND) level with no adverse effect on sexual maturity status in young boars. Fat AND level was measured on a biopsy sample of backfat taken at 118 kglive weight. Sexual maturity status was assessed by bulbo-urethral gland (BUG) thickness measured by echotomography at 99 kg live weight. The experimental design included a control and a select line having a Large White-Landrace genetic background, and both lines were intended to comprise five sires at each generation. A total of 949 boars were recorded for both index traits throughout the experiment. The pattern of direct responses to this 'antagonistic' selection differed from expectation, and consisted of no response in fat AND level and a significant positive genetic trend in BUG development. The reasons for this discrepancy are discussed in terms of selection differential being achieved for each index trait ('index in retrospect') anddeviations of the estimated (by REML) genetic parameters from the expectedones. Heritability estimates were close to 0.50 for fat AND level and 0.60for BUG development whereas the genetic correlation among them amounted toabout 0.65. Moreover, a significant genetic correlation of 0.30-0.40 was found between the sexual maturation of boars and that of related gilts. (C) 2000 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 05/12/20 alle ore 13:58:59