|
|
:
|
The aim of this study was to estimate the amount of inbreeding coefficient in native fowls and its impact on important economic traits. In this research, data of 97272 bird that were collected through 21 generations from the Esfahan native fowls breeding station and data of 61563 bird that were collected through 21 generations from the West Azarbaijan native fowls breeding station, data of57400 bird that were collected through 21 generations from the Yazd native fowls breeding station data of 38489 bird that were collected through 12 generations from the Khorasan Razavi native fowls breeding station, data of 81175 bird that were collected from 21 generations from the Mazandaran native fowls breeding station, data of 63250 bird that were collected from 21 generations from the Fars native fowls breeding station were used. Estimation of inbreeding coefficient was done by CFC program and the genetic parameters were estimated by using WOMBAT software. Results of the pedigree analysis showed that 77313 (79.48 percent) in Esfahan and 54981 (89.31 percent) in West Azarbaijan, 45351 (79 precent) in Yazd, 21892 (56.88 percent) in Khorasan Razavi, 59075 (73 precent) in mazandaran and 40184 (64 percent) of beerd are inbred.The mean individual and maternal inbreeding coefficient were estimated to be (4.4 and 3.5) present in Esfahan, (6 and 4.8) percent in West Azarbaijan, (0.02 and 0.03) in Yazd, (0.01 and 0.02) in Khorasan Razavi, (0.036 and 0.044) in Mazandaran and (0.02 and 0.23) in Fars. Inbreeding depression per 1 percent increase of individual inbreeding for BW1, BW8, BW12, ASM, WSM, EN, EW1 and MEW was -0.008, -2.51, -3.51, 0.23, -3.97, -0.13, 0.06 and 0.02, in Esfahan native fowls. 0.04, -1.51, -2.49, 0.12, -1.22, -0.01, -0.01 and -0.02 in West Azarbaijan, 0.0003, 0.69, 1.16, 2.27, 0.14, 0.05, 0.05 in Yazd, 0.04, 0.51, 1.17, 0.19, 1.05, 0.08, 0.05, 0.02 in Yazd , 0.04, 0.51, 1.17, 0.19, 1.05, 0.08, 0.05, 0.02 in Khorasan Razavi , 0.02, 1.32, 2.04, 0.31, 0.11, 0.18, 0.03, 0.03 in Mazandaran and 0.02, 1.07, 2.14, 0.38, 0.27, 0.07, 0.01, 0.08 in Fars native fowls. The results of this study showed that the inbreeding rate was low in the closed population of Esfahan and West Azarbaijan native chicken station. This is because of implementing appropriate mating designs. In these populations, the absence of inbred birds is almost impossible, but it is possible to have a suitable mating design for reducing the probable undesirable effects of inbreeding.
|