Correlated selection responses to upwards and downwards selection for backfat and daily gains in pigs
نویسندگان
چکیده
منابع مشابه
Correlated responses in reproductive and carcass traits to selection for 200-day weight in Landrace pigs.
Correlated responses in reproductive and carcass traits from a line of Landrace pigs selected for increased 200-d weight along with a randomly selected control line were studied in 195 litters (109 select, 86 control) and 285 pigs (132 select, 153 control). Reproductive and maternal traits studied included litter sizes born, born alive, and alive at 21 d and litter weights at birth and at 21 d....
متن کاملDirect and Correlated Responses to Selection
Hemolymph juvenile hormone esterase (JHE) activity on the third day of the last stadium in the cricket, Gryllus assirnilis, exhibited a significant response to selection in each of six replicate lines. Mean realized heritability was 0.26 t 0.04. The response was due to changes in whole-organism enzyme activity as well as to changes in the proportion of enzyme allocated to the hemolymph compartm...
متن کاملCorrelated responses of pre- and postweaning growth and backfat thickness to six generations of selection for ovulation rate or prenatal survival in French Large White pigs.
Correlated effects of selection for components of litter size on growth and backfat thickness were estimated using data from 3 pig lines derived from the same base population of Large White. Two lines were selected for 6 generations on either high ovulation rate at puberty (OR) or high prenatal survival corrected for ovulation rate in the first 2 parities (PS). The third line was an unselected ...
متن کاملResponse to selection for decreased backfat thickness at restrained intramuscular fat content in Duroc pigs.
Intramuscular fat (IMF) content is a relevant trait for the pig industry and consumers. However, selection for IMF has the undesired correlated effect of decreasing lean growth. A selection experiment was performed to investigate the effects of selection against backfat thickness (BT) at restrained IMF. Barrows from a purebred Duroc line were allocated into a selected (n = 165) or a control (n ...
متن کاملCorrelated quantal responses and equilibrium selection
This paper considers incomplete information games with payoffs subject to correlated random disturbances. It explains the connection between the uniqueness of quantal response equilibria, where large noise is required, and the uniqueness of equilibria in global games, where small noise is required. JEL classifications: C72, D82.
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ژورنال
عنوان ژورنال: Genetics Selection Evolution
سال: 1978
ISSN: 1297-9686
DOI: 10.1186/1297-9686-10-1-144a