title: Inbreeding depression for economically important traits of Mazandaran native fowls.
abstract: 1. The objective was to investigate inbreeding depression for some economic traits of Mazandaran native fowls using data collected from 1992 to 2012 (21 generations) using a REML 2. The mean inbreeding coefficient (F) for the whole population and dams was 4.67% and 4.12%, respectively, and most of the inbred birds (75.79%) and inbred dams (72.58%) had F < 12.5%. 3. Individual and dam inbreeding trends were 0.55% and 0.53% per year. 4. Inbreeding depression for body weight at hatch, at 8 weeks and 12 weeks of age, age at sexual maturity, weight at sexual maturity, egg weight at 1st d of laying and average egg weight at 28, 30 and 32 weeks of laying due to a 1% increase in individual inbreeding were -0.11 g, -3.1 g, -1.3 g, 0.15 d, 0.59 g, -0.05 g and -0.03 g, respectively. 5. A 1% increase in maternal inbreeding resulted in a reduction of 0.06, 0.6 and 3.6 g in body weight at hatch, 8 weeks and 12 weeks of age.
authors.affiliation: a Department of Animal Science , Sari University of Agriculture and Natural Resources (SANRU) , Sari , Iran.
authors.forename: A
authors.initials: A
authors.lastname: Rahmanian
authors.forename: H
authors.initials: H
authors.lastname: Hafezian
authors.forename: G H
authors.initials: GH
authors.lastname: Rahimi
authors.forename: A
authors.initials: A
authors.lastname: Farhadi
authors.forename: H
authors.initials: H
authors.lastname: Baneh
mesh_terms: D000822:Animal Husbandry; D000818:Animals; D002645:Chickens / Q000235:genetics* / Q000254:growth & development / Q000502:physiology; D007178:Inbreeding; D007492:Iran; D010063:Ovum / Q000502:physiology