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| Inflammation of the stomach and intestines. |
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| The basic unit of heredity, made up of DNA. |
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| The period of time between the birth of one generation and the birth of the next. |
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| The extent of similarity between two traits (raging from 11 to +1) due solely to genetic influences. Two traits can be controlled by the same genes. Positive genetic correlation indicates that selection for one trait will result in a positive, correlated response in another trait. |
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| The time required for genes to pass from the nucleus to the slaughter generation. Successive generation intervals in the nucleus, daughter nucleus, and multiplier layers in the breeding pyramid comprise this period. |
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| A particular sow or boar´s position in a breeding pyramid. |
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| A DNA fragment that has been mapped to a specific site on a chromosome and which can be used to help identify traits of interest. |
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| The genetic composition of boars and sows in common terms, such as to purebred or hybrid. Syn: Line. |
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| Actual genetic makeup of an individual determined by its genes or germplasm. |
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| Variation in the relative performance of different genotypes from one environment to another. |
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| Period of time between conception and farrowing (112 to 114 days or 3 months, 3 weeks and 3 days). |
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| Period of pregnancy, or time between service and the subsequent farrowing or abortion (the day of service is counted as day 0). |
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| A female pig that has not given birth. |
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| Replacement gilts that have been selected and introduced into the sow herd to be used for breeding but have not yet been bred. |
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| The number of gilts that enter the herd/yr multiplied by 100 and divided by the average sow inventory in the same period. |
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| Disease caused by Haemophilus parasuis. |
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| The parent stock (boar or sow) in commercial production in a multiplier herd. |
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| Skin Disease caused by Staphylococcus hyicus. |
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| The grandparent stock (boar or sow) in a nucleus herd. |
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| Swine from about 40 to 200 lb. |
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| Non-nutrient feed additives that decrease the feed conversion ratio and increase growth rate. |
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| The per-day rate at which live weight increases between two successive weighings. |
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