The performance of purebred and crossbred sows
نویسندگان
چکیده
منابع مشابه
Genetic Correlations between the Performance of Purebred and Crossbred Pigs
Genetic correlations between purebred Duroc (DU), Large White (LW) and Landrace (LR) pigs and their crossbreds LW×LR, LR×LW, DU×(LW×LR) and DU×(LR×LW) were estimated for production and reproduction traits. Performance test and litter records from Government pig breeding stations in Thailand were used. REML bivariate animal models were used to estimate genetic correlations for each trait measure...
متن کاملGrowth performance for four breeds of swine: crossbred females and purebred and crossbred boars.
Purebred and two-breed cross (F1) boars were mated to F1 females to produce all possible three- and four-breed cross pigs involving the Duroc, Yorkshire, Landrace and Spotted breeds. Individual postweaning average daily gain (ADG), age at 100 kg (AGE) and probed backfat thickness at 100 kg (BF) data were collected on 3,456 pigs. A total of 213 pens with an average of 15.58 pigs per pen was eval...
متن کاملReproductive performance for four breeds of swine: crossbred females and purebred and crossbred boars.
Matings and litters were studied involving all three-breed crosses (sired by purebred boars) and four-breed crosses (sired by cross-bred boars) from the Duroc, Yorkshire, Landrace and Spotted breeds. There were 764 female mating records and 161 boars used over five sequential breeding seasons. A sample of pregnant gilts was slaughtered each season and the remainder were allowed to carry their l...
متن کاملVariance components and heritabilities for sow productivity traits estimated from purebred versus crossbred sows.
Genetic parameters were estimated for number of pigs born alive (NBA), adjusted litter weaning weight (ALWT), and the interval from weaning to first service (W2E) using 2002 purebred litter records and 14 583 crossbred litter records from a swine production unit with a defined great-grandparent, grandparent, and parent stock genetic system structure. Estimation of (co)variance components was ca...
متن کاملReproductive performance of purebred Hampshire sows in Sweden
The objective of this study was to retrospectively investigate causes of variation in the reproductive performance of purebred Hampshire sows in Sweden. Data analysed comprised farrowings between 1992 and 1998 from five Swedish nucleus herds and included 6347 litters from 2210 sows. The main traits analysed were litter size, weaning-to-first service interval (WSI), farrowing rate, remating rate...
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ژورنال
عنوان ژورنال: Asian-Australasian Journal of Animal Sciences
سال: 1991
ISSN: 1011-2367,1976-5517
DOI: 10.5713/ajas.1991.143