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Title:   Author  item
                                            ZHU, JAMES - 1265-20-00item
                                            Lillehoj, Hyunitem
                                            ALLEN, P - 1265-40-00item
                                            CHENG, H - USDA MICHIGANitem
                                            POLLOCK, D - PERDUE FARMS, MARYLANDitem
                                            EMARA, M - U. DELAWARE NEWARK DE
  Submitted to: Beltsville Agricultural Research Center Symposium
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 4/1/2000
                                    Publication  Date: N/A
                                    Citation: N/AInterpretive Summary:
                                Technical Abstract: To map quantitative trait loci (QTL) affecting disease resistance to avian coccidiosis, three hundred F-2 offspring from 12 full-sib families were produced from a cross of two commercial broiler lines different in resistance to the disease.  The F-2 offspring were inoculated with 10-4 sporulated oocysts of E. maxima at 4 weeks old.  Body weight gain, fecal  oocyst shedding, plasma NO2-+NO3-, carotenoid, and interferon-gamma concentrations were measured at three different time periods post-infection.  An infection index was also calculated from the correlated parameters for QTL mapping.  Seventy-thre chicken microsatellite markers with an average marker interval of 50 cM were used for genotyping of the F1 and F2 chickens.  The result of statistical analysis showed that there were several marker loci associated with the disease associated-parameters.


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