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Aromatase gene and its effects on growth, reproductive and maternal ability traits in a multibreed sheep population from Brazil Genet. Mol. Biol.
Lôbo,Ana Maria Bezerra Oliveira; Lôbo,Raimundo Nonato Braga; Paiva,Samuel Rezende.
We determined the polymorphism C242T of the aromatase gene (Cyp19) and its allelic frequency, as well as the effect of the variants on productive and reproductive traits in 71 purebred Santa Inês sheep, 13 purebred Brazilian Somali sheep, nine purebred Poll Dorset sheep, and 18 crossbred 1/2 Dorper sheep. The animals were genotyped using the PCR-RFLP technique. The influence of the animal's genotype on its performance or on the performance of its lambs was analyzed by the least square method. Another factor assessed was the importance of the animal's genotype in analysis models for quantitative breeding value estimates, and whether there were differences among the averages of breeding values of animals with different genotypes for this gene. In the sample...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Body weight; Lambing interval; PCR-RFLP; Polymorphism; SNP; Litter weight.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000300010
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Factors influencing colostrum yield by sows Arq. Bras. Med. Vet. Zootec.
Machado,A.P.; Otto,M.A.; Bernardi,M.L.; Wentz,I.; Bortolozzo,F.P..
ABSTRACT An adequate colostrum intake, in order to ensure the survival and weight gain of piglets, depends on the sow's ability to produce enough colostrum for the whole litter. The aim of this study was to evaluate factors involved in colostrum yield (CY) variability related to the sow, the litter and the farrowing process. The experiment was conducted with 96 Camborough 25(r) sows of parities one to seven, whose farrowing was spontaneous. Colostrum production of each sow was estimated by summing up the colostrum intake of each piglet in the litter, estimated by an equation that takes into account the birth weight and weight gain during the first 24h of life. The multiple regression model explained 28% of variation in CY, with 24% and 4% respectively of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Litter weight; Parity; Obstetrical interventions.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352016000300553
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Genetic homogenisation of birth weight in rabbits : Indirect selection response for uterine horn characteristics Inra
Bolet, G.; Garreau, H.; Joly, T.; Theau-Clément, M.; Falières, J.; Hurtaud, J.; Bodin, L.; INRA, Institut National de la Recherche Agronomique (FRA).
Tipo: Journal Article Palavras-chave: Rabbit; Homogenisation; Selection; Litter weight; Uterus.
Ano: 2007 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20072e69e866&uri=/notices/prodinra1/2007/09/
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Genetic parameters for growth, reproductive and maternal traits in a multibreed meat sheep population Genet. Mol. Biol.
Lôbo,Ana Maria Bezerra Oliveira; Lôbo,Raimundo Nonato Braga; Paiva,Samuel Rezende; Oliveira,Sônia Maria Pinheiro de; Facó,Olivardo.
The genetic parameters for growth, reproductive and maternal traits in a multibreed meat sheep population were estimated by applying the Average Information Restricted Maximum Likelihood method to an animal model. Data from a flock supported by the Programa de Melhoramento Genético de Caprinos e Ovinos de Corte (GENECOC) were used. The traits studied included birth weight (BW), weaning weight (WW), slaughter weight (SW), yearling weight (YW), weight gain from birth to weaning (GBW), weight gain from weaning to slaughter (GWS), weight gain from weaning to yearling (GWY), age at first lambing (AFL), lambing interval (LI), gestation length (GL), lambing date (LD - number of days between the start of breeding season and lambing), litter weight at birth (LWB)...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Age at first lambing; Genetic correlation; Heritability; Body weight; Litter weight.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000400016
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