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| Pneumonia caused by Actinobacillus pleuropneumoniae. |
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| A half-brother or half-sister. |
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| Individuals having the same sire or dam. Half-brothers and/or half-sisters. |
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| Half siblings that have the same dam. |
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| Half-siblings that have the same sire. |
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| Cured and smoked meat from the hind leg of pork, excluding the shank. |
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| Herdsperson in the breeding pen with one sow and one boar at least until intromission. |
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| An individual female that is ready to be bred is exposed to an individual boar in a small pen for mating, under the supervision of the producer. |
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| Estrus; the period during which a female is sexually receptive. |
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| A finished pig class in the United Kingdom in the weight category of over 82 kg (180 lb) carcass weight. |
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| A net gain or loss resulting from trading in pig futures. |
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| The average number of sows and gilts in a herd. Con: Herd size, sow |
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| The average number of mated females (but not unserved gilts) in a herd. |
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| The transmission of genetic or physical traits of parents to their offspring. |
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| The proportion of the variation in traits attributable to genetics. Heritability varies from zero to one. The higher the heritability of a trait, the more accurately the individual performance predicts breeding value and the more rapid should be the response due to selection for that trait. |
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| The improvement in production observed or measured in crossbred animals compared with the average of their purebred parents; hybrid vigor. |
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| Alleles of a specific gene pair that are different in an individual. |
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| A pig of any size. |
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| Alleles of a specific gene pair that are alike in an individual. |
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| Low cost, uninsulated and naturally ventilated hoop-shaped building used for production and typically bedded with straw. |
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| Substances produced by glands in one part of the body and carried by the blood to another part of the body where they modify the activity of other organs. |
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| An animal produced from the crossing or mating of two animals of different breeds. |
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| The increase of size, speed of growth, and vitality of a crossbred over its parents. |
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| (1) Technique used in some specific pathogen-free laboratories to remove unborn pigs from the sow. The entire uterus is removed with the pigs inside. This operation makes the sow useless, and she is slaughtered immediately after the operation. (2) Surgical removal of all or parts of the uterus. |
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