TAILIEUCHUNG - Báo cáo sinh học: "Genetic variability of age and weight at puberty, ovulation rate and embryo survival in gilts and relations with production traits"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học Journal of Biology đề tài: Genetic variability of age and weight at puberty, ovulation rate and embryo survival in gilts and relations with production traits | Genet Sei Evol 1996 28 103-115 Elsevier INRA 103 Original article Genetic variability of age and weight at puberty ovulation rate and embryo survival in gilts and relations with production traits JP Bidanel1 J Gruand2 c Legault1 1 Station de génétique quantitative et appliquée Centre de recherche de Jouy-en-Josas Institut national de la recherche agronomique 78352 Jouy-en-Josas cedex 2 Station experimentale de selection porcine Institut national de la recherche agronomique 86480 Rouillé France Received 12 January 1995 accepted 21 September 1995 Summary - Age AFE weight WFE and ovulation rate OR at first estrus number of embryos NE and embryo survival ES NE OR at 30 days of gestation of French Large White LW French Landrace LF and crossbred LW X LF gilts and their genetic relationships with average daily gain between 30 and 85 kg ADG and average backfat thickness at 85 kg ABT were analyzed. Breed differences as well as genetic parameters in the LW breed were estimated using a restricted maximum likelihood procedure applied to a multiple trait animal model. A total of 3 664 male and female pigs were measured for ADG and ABT between 1966 and 1979 1 919 gilts were checked daily for puberty between 140 and 300 days of age. Most females were then bred and slaughtered at 30 days of gestation for measuring the number of corpora lutea and the number of embryos. Breed marginal means were respectively and days for AFE and kg for WFE and for OR and and for NE in LW LF and LW X LF gilts. Heritability estimates were and se respectively for AFE WFE OR NE and ES. Genetic correlations between AFE and WFE between NE and OR or ES were rather large and respectively . OR and ES had a low genetic correlation . AFE was negatively correlated with ADG ABT -0 21 OR -0 36 and NE r . .

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