title: Evaluation of Arkansas Rous sarcoma regressor and progressor lines and giant jungle fowl for genetic resistance to the northern fowl mite.
abstract: Arkansas B1B1R, B2B2R, and B3B3R regressor lines, Arkansas B1B1Pr, B2B2Pr, and B3B3Pr progressor lines, and Giant Jungle Fowl were infested simultaneously at 28 weeks of age with northern fowl mites. The chickens were maintained in similar environments and mite ratings were recorded weekly for 5 months. No strains were completely resistant to mites, but there were significant (P less than or equal to .05) differences among strains in degree of infestation. The regressor lines generally showed significantly (P less than or equal to .05) less infestation than the progressor lines for both female and male chickens. The regressor lines appear to have genetic factors from the Giant Jungle Fowl in the development of the regressor lines that imparted increased resistance to the northern fowl mite.
mesh_terms: D000818:Animals; D002645:Chickens / Q000276:immunology; D005260:Female; D008297:Male; D008924:Mite Infestations / Q000235:genetics / Q000276:immunology / Q000662:veterinary*; D008925:Mites / Q000276:immunology; D011201:Poultry Diseases / Q000235:genetics* / Q000276:immunology; D001357:Sarcoma, Avian / Q000235:genetics*; D013045:Species Specificity