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The objective of this study was to estimate genetic associations for gilt growth, compositional, and structural soundness with sow longevity and lifetime reproduction. Performance and pedigree information from 1,447 commercial females from 2 genetic lines were included in the data analyzed. Growth was expressed as days to 113.5 kg BW (DAYS) and(More)
Ratios of the phenotypic values of two traits may be used as selection criteria in animal and plant breeding to improve the ratio traits themselves or to effect changes in their two component (numerator and denominator) traits. Prediction of genetic responses to ratio-based selection would facilitate quantitative analysis and evaluation of selection based(More)
The objective of this study was to estimate genetic parameters for growth, body composition, and structural soundness traits in commercial gilt lines. The data included 1,449 gilts: 462 females from a grandparent maternal line and 987 from a parent maternal line. Growth was expressed as number of days to a constant 113.5 kg BW (DAYS) and compositional(More)
The genetic change from multiple-trait selection experiments can be equated to the regression of genotype on phenotype. This gives rise to a method of obtaining estimates of additive genetic variances and covariances. The method requires the use of selection weights, derived by means of the index-in-retrospect, to provide invariant solutions. Solution(More)
Uterine luminal protein (ULP) collected from ovariectomized steroid-treated crossbred heifers was tested for immunosuppressive activity in vitro. Heifers were allotted to treatment groups and for 16 d received daily injections of the following steroids or vehicle: Control (C, corn oil only, n=10); estradiol-17beta (E(2), 1.1 mug/kg body wt, n=10);(More)
Temporal secretory patterns of porcine uterine suppressor (>/=230 kD) and stimulatory (29 kD) macromolecules were evaluated within uterine luminal protein (ULP) secretions recovered during early pregnancy. The ULP was recovered by uterine flushing from four Landrace gilts each on Days 9, 12, 15 and 18 of pregnancy. Unfractionated and fractionated ULP (using(More)
Uterine luminal protein (ULP) secretions collected on day 17 of bovine pregnancy contain high (greater than or equal to 248 kDa)- and low (7, 21.0, and greater than or equal to 72 kDa)-molecular weight (Mr) components that suppressed incorporation of thymidine into both phytohemagglutinin (PHA)-stimulated and interleukin-2 (IL-2)-stimulated bovine(More)
Bovine uterine luminal protein (ULP) components (> or = 4 x 10(6) and 21,000 M(r)) were obtained from uterine flushings on Day 17 of pregnancy. Experiments were conducted to determine the capability of these components to interfere with the cytolytic activity of interleukin-2 (IL-2)-treated peripheral blood lymphocytes (PBL), designated LAK(More)
Selection for feed conversion substantially influenced growth and gross feed efficiency of mice. Realized heritabilities and genic correlation for increased gain on fixed feed intake (FF) and decreased feed intake on a constant gain (FG) were estimated to be .56, .73 and -.93, respectively. The genic correlations between FF and 56-day weight and between FG(More)
T-lymphocytes were quantitated within luminal, stromal and glandular areas of ovine endometrium. In experiment 1, ovariectomized (OVX), estrus (E) and day 13 (D13) ewes (six/group) received 500 micrograms of phytohemagglutinin (PHA) or vehicle in ligated right and left uterine horns, respectively. At 48 h, uteri were removed for the immunohistochemical(More)