Resistance to Marek's disease observed among sire families and inbred lines.
D000818:Animals; D002645:Chickens; D005260:Female; D014644:Genetic Variation; D007178:Inbreeding; D008297:Male; D008380:Marek Disease / Q000235:genetics* / Q000276:immunology / Q000401:mortality; D012641:Selection, Genetic