Primary Audience: Breeder Managers, Broiler Companies, Poultry Extension SDecialists SUMMARY

This study investigated the effects of genotype and cold stress on the incidence of ascites. Data from 600 cockerels representing two male lines and the cross between them were collected when birds were between 2 and 7 wk of age. Data included packed cell volume PCV), the ratio of right to total ventricle weight (ratio), shank le KL), body weight (BWT), and ascites. Gen its except three- and four-week PCV and d six-week SL, four to nd 6.4 % for control birds. The objective of this study was to use cold stress and ge to reproduce and study this syndrome under experimental conditions