Effects of kinship matings on hatchability of fertile Japanese quail eggs

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Erdem H., Konyalı C., Ünbaş E., Savaş T.

III International and XII National Animal Science Conference, Bursa, Turkey, 27 - 28 November 2021, pp.99

  • Publication Type: Conference Paper / Summary Text
  • City: Bursa
  • Country: Turkey
  • Page Numbers: pp.99
  • Çanakkale Onsekiz Mart University Affiliated: Yes


It is known that inbreeding increases the homozygosity ratio, whereby the probability of homozygosity of semi-lethal or lethal genes also increases. Furthermore, it leads also to an impoverishment of the genoms. The probability of inbreeding depression is higher for traits with low heritability, such as reproductive traits, than for traits with relatively higher heritability. In this study, the effects of different kinship matings on fertile egg hatchability were investigated. 2310 quail eggs were obtained from mother-son (MS), father-daughter (FD), full-sibling (FS), half-sibling (HS), and not related (CONT) matings. Four incubations were performed and eggs in each incubation were obtained from different birds. The female-male ratio was 1:1 for related matings and 2:1 for CONT mating. Fertilized eggs and embryo losses were determined after hatching. Hatchability was recorded as a binomial trait. A threshold model with incubation parties and mating groups as fixed factors was analyzed using the generalized estimating equation method. Odds ratios (Ψ=eb) were calculated from the estimation values (b) and Euler’s number (e). The effect of mating type was significant (P<0.0001). The probability of hatching of eggs from matings that has F=0.25 inbreeding coefficients (MS, FD, FS) were 27% to 54% lower than from matings produce no inbreed (CONT) (P<0.05). Interestingly, the probability of HS eggs to hatch were light higher than the CONT eggs, but not significant (P>0.05). Eggs hatching probability from MS mating were significant lower than FD and FS (P<0.05). On the other hand, no significant difference was observed for the hatching probabilities between FD and FS eggs (P> 0.05). The results reflects the difference in the genetic relationship between parents and offspring versus between siblings. While the relationship between parents and offsprings are absolute, the relationship between siblings are relative averages.