End-of-Season Carcass and Reproductive Traits in Original and Replacement Male Broiler Breeders

Wilson, 1979, Prediction of the fertility potential of broiler breeder males, Worlds Poult. Sci. J., 35, 95, 10.1079/WPS19790008 Siegel, 1985, Reproductive complications associated with selection for broiler growth, 55 Bramwell, 1996, Influence of male broiler breeder dietary energy intake on reproduction and progeny growth, Poult. Sci., 75, 767, 10.3382/ps.0750767 Brillard, 1986, Influence of spermatazoa numbers and insemination frequency on fertility in dwarf broiler breeder hens, Poult. Sci., 65, 2330, 10.3382/ps.0652330 Hocking, 1989, Musculo-skeletal lesions in adult male broiler breeder fowl and their relationships with body weight and fertility at 60 weeks of age, Br. Poult. Sci., 30, 777, 10.1080/00071668908417203 Duncan, 1990, Sexual behavior and fertility in broiler breeder domestic fowl, Appl. Anim. Behav. Sci., 26, 201, 10.1016/0168-1591(90)90137-3 Reddy, 1990, Selection for growth and semen traits in the poultry industry: What can we expect in the future?, 47 McGary, 2002, Phenotypic traits as reliable indicators of fertility in male broiler breeders, Poult. Sci., 81, 102, 10.1093/ps/81.1.102 McGary, 2003, Potential relationship between physical traits and male broiler breeder fertility, Poult. Sci., 82, 328, 10.1093/ps/82.2.328 Hubbard-ISA. Duluth, GA. Canadian Council on Animal Care, 1984, 2 Sikur, 2004, Effects of nutrient density on growth and carcass traits in fast- and slow-feathering female turkeys, Poult. Sci., 83, 1507, 10.1093/ps/83.9.1507 SAS Institute, 1999 Body weight and carcass characteristic data were analyzed by 1-way ANOVA [13] comparing the original to the replacement males. One-way ANOVA was used within the original and the replacement male groups to compare body size groups. Pearson correlation analysis [13] was performed to assess relationships between the parameters measured. The footpad score data underwent chi-squared analysis using Fisher's exact test [13]. Significance was assessed at the P< 0.05 level. Kondra, 1955, Heritability of some body measurements and reproductive characters in turkeys, Poult. Sci., 34, 1262, 10.3382/ps.0341262 Ogasawara, 1963, The effect of selection for body weight on reproduction in turkey hens, Poult. Sci., 42, 838, 10.3382/ps.0420838 Bjerstedt, 1995, Carcass traits and reproductive organ morphology in 62-week-old SCWL hens, Can. J. Anim. Sci., 75, 341, 10.4141/cjas95-052 Soller, 1965, Semen characteristics, failure of insemination and fertility in Cornish and White Rock males, Poult. Sci., 44, 424, 10.3382/ps.0440424 Renema, 1999, Effects of body weight and feed allocation during sexual maturation in broiler breeder hens. 1. Growth and carcass characteristics, Poult. Sci., 78, 619, 10.1093/ps/78.5.619 Karaca, 2002, The effects of heat stress and sperm quality classification on broiler breeder male fertility and semen ion concentrations, Br. Poult. Sci., 43, 621, 10.1080/0007166022000004552 Bilcik, 2002, Impact of male-male competition and morphological traits on reproductive behavior in broiler breeders, Poult. Sci., 81, 5 Joseph, 2002, Responses of two strains of female broiler breeders to a mid-cycle increase in photoperiod, Poult. Sci., 81, 745, 10.1093/ps/81.6.745 Dashti, 1983, Concurrent induction of avian hepatic lipogenesis, plasma lipids, and plasma apolipoprotein B by estrogen, J. Lipid Res., 24, 368, 10.1016/S0022-2275(20)37977-3 Ekstrand, 1998, Prevalence and control of foot pad dermatitis in broilers in Sweden, Br. Poult. Sci., 39, 318, 10.1080/00071669888845 VonSchantz, 1995, Artificial selection for increased comb size and its effects on other sexual characters and viability in Gallus domesticus (the domestic chicken), Heredity, 75, 518, 10.1038/hdy.1995.168 Ottinger, 1986, Histological and neuroendocrine correlates of the age-related reproductive decline in male quail, Poult. Sci., 65, 100 Duke, 1993 Wilson, 1988, Correlation of broiler breeder male semen production and testes morphology, Poult. Sci., 67, 660, 10.3382/ps.0670660 Brown, 1983, Effects of dietary restriction on reproductive performance of broiler breeder males, Poult. Sci., 62, 1885, 10.3382/ps.0621885 Wilson, 1987, Dietary protein levels for broiler breeder males, Poult. Sci., 66, 237, 10.3382/ps.0660237 Sexton, 1989, Effects of ad libitum and restricted feeding on semen quantity and quality, body composition, and blood chemistry of caged broiler breeder males, Poult. Sci., 68, 569, 10.3382/ps.0680569 Bowling, 2003, Attributes of broiler breeder males characterized by low and high sperm mobility, Poult. Sci., 82, 1796, 10.1093/ps/82.11.1796