Presentation on theme: "Lesson 2: Breeds of Swine"— Presentation transcript:
1 Lesson 2: Breeds of Swine Swine ProductionLesson 2: Breeds of Swine
2 Breeds of Hogs Berkshire Chester White Duroc Hampshire Landrace PietrainPoland ChinaSpottedYorkshire
3 Berkshire Black with six points and erect ears Produce high quality meatImported from England in the early 1800’s
4 Chester White White with small drooping ears Once popular for their durability and ruggedness; also have good mothering abilityOriginated in Pennsylvania in the early 1800’s
5 Duroc Red with drooping ears Used to produce fast-growing market hogs Developed in the United States in the mid-1800’s by crossing red hogs from New York and New Jersey
6 HampshireBlack with a white belt around the front of the body and erect earsUsed to produce lean, heavily muscled offspringImported from England during the early 1800’s
7 LandraceWhite with large, droopy ears that cover the entire the entire faceUsed as a maternal breed because of their mothering abilityImported from Denmark in the 1930’s
8 Pietrain Spotted with erect ears Leanest and most heavily muscled hogs; often carry a stress gene linked to meat quality problemsUsed to produce terminal siresImported from Germany and Poland
9 Poland ChinaBlack with six white points (like Berkshires) but with drooping earsHave been used to increase growth rates, but the breed’s popularity has decreased because it has not kept up with the trend toward leannessOriginated in Ohio in the first half of the nineteenth century
10 Spotted Black and white spots and drooping ears Have been used because of their rapid growth, but their numbers are small in comparison with other breeds used by the swine industryOriginated in Indiana from the Poland China breed; purebred association formed in 1914
11 Yorkshire White with erect ears Used for mothering traits and for lean, heavily muscled, fast-growing market hogsImported from England in the early 1800’s
12 2. What are the determining factors in breed selection? Breeds used in the pastLitter sizesLeannessMuscleCurrent growth ratesEfficiency in the conversion of feed to pork
13 3. How are hybrid hogs developed? A. Hybrid hogs are developed by crossing multiple breeds and selected for desired traits.B. Companies offer hybrid hogs varying in use from a maternal to a terminal emphasis.
14 4. How are inbreeding, outcrossing, and crossbreeding different? A. Inbreeding – mating two related animals in an attempt to concentrate desired traits in offspringClosebreeding – mating closely related animalsLinebreeding – mating animals that are slightly or distantly related, with only one shared ancestorOutcrossing – mating unrelated animals of the same breed; more popular and safer than inbreeding since inbreeding can concentrate undesirable and even detrimental traitsCrossbreeding – mating animals of two different breeds, which results in a hybrid offspring that should maximize heterosis, or hybrid vigor
Your consent to our cookies if you continue to use this website.