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Inbreeding affected differently on observations distribution of a growth trait in Iranian Baluchi sheep

OBJECTIVE: Initial consequence of inbreeding is inbreeding depression which impairs the performance of growth, production, health, fertility and survival traits in different animal breeds and populations. The effect of inbreeding on economically important traits should be accurately estimated. The e...

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Autores principales: Binabaj, Fateme Bahri, Farhangfar, Seyyed Homayoun, Jafari, Majid
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Animal Bioscience 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7961280/
https://www.ncbi.nlm.nih.gov/pubmed/32106655
http://dx.doi.org/10.5713/ajas.19.0642
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author Binabaj, Fateme Bahri
Farhangfar, Seyyed Homayoun
Jafari, Majid
author_facet Binabaj, Fateme Bahri
Farhangfar, Seyyed Homayoun
Jafari, Majid
author_sort Binabaj, Fateme Bahri
collection PubMed
description OBJECTIVE: Initial consequence of inbreeding is inbreeding depression which impairs the performance of growth, production, health, fertility and survival traits in different animal breeds and populations. The effect of inbreeding on economically important traits should be accurately estimated. The effect of inbreeding depression on growth traits in sheep has been reported in many breeds. Based on this, the main objective of the present research was to evaluate the impact of inbreeding on some growth traits of Iranian Baluchi sheep breed using quantile regression model. METHODS: Pedigree and growth traits records of 13,633 Baluchi lambs born from year 1989 to 2016 were used in this research. The traits were birth weight, weaning weight, six-month weight, nine-month weight, and yearling weight. The contribution, inbreeding and co-ancestry software was used to calculate the pedigree statistics and inbreeding coefficients. To evaluate the impact of inbreeding on different quantiles of each growth trait, a series of quantile regression models were fitted using QUANTREG procedure of SAS software. Annual trend of inbreeding was also estimated fitting a simple linear regression of lamb’s inbreeding coefficient on the birth year. RESULTS: Average inbreeding coefficient of the population was 1.63 percent. Annual increase rate of inbreeding of the flock was 0.11 percent (p<0.01). The results showed that the effect of inbreeding in different quantiles of growth traits is not similar. Also, inbreeding affected differently on growth traits, considering lambs’ sex and type of birth. CONCLUSION: Quantile regression revealed that inbreeding did not have similar effect on different quantiles of growth traits in Iranian Baluchi lambs indicating that at a given age and inbreeding coefficient, lambs with different sex and birth type were not equally influenced by inbreeding.
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spelling pubmed-79612802021-04-01 Inbreeding affected differently on observations distribution of a growth trait in Iranian Baluchi sheep Binabaj, Fateme Bahri Farhangfar, Seyyed Homayoun Jafari, Majid Anim Biosci Article OBJECTIVE: Initial consequence of inbreeding is inbreeding depression which impairs the performance of growth, production, health, fertility and survival traits in different animal breeds and populations. The effect of inbreeding on economically important traits should be accurately estimated. The effect of inbreeding depression on growth traits in sheep has been reported in many breeds. Based on this, the main objective of the present research was to evaluate the impact of inbreeding on some growth traits of Iranian Baluchi sheep breed using quantile regression model. METHODS: Pedigree and growth traits records of 13,633 Baluchi lambs born from year 1989 to 2016 were used in this research. The traits were birth weight, weaning weight, six-month weight, nine-month weight, and yearling weight. The contribution, inbreeding and co-ancestry software was used to calculate the pedigree statistics and inbreeding coefficients. To evaluate the impact of inbreeding on different quantiles of each growth trait, a series of quantile regression models were fitted using QUANTREG procedure of SAS software. Annual trend of inbreeding was also estimated fitting a simple linear regression of lamb’s inbreeding coefficient on the birth year. RESULTS: Average inbreeding coefficient of the population was 1.63 percent. Annual increase rate of inbreeding of the flock was 0.11 percent (p<0.01). The results showed that the effect of inbreeding in different quantiles of growth traits is not similar. Also, inbreeding affected differently on growth traits, considering lambs’ sex and type of birth. CONCLUSION: Quantile regression revealed that inbreeding did not have similar effect on different quantiles of growth traits in Iranian Baluchi lambs indicating that at a given age and inbreeding coefficient, lambs with different sex and birth type were not equally influenced by inbreeding. Animal Bioscience 2021-04 2020-02-25 /pmc/articles/PMC7961280/ /pubmed/32106655 http://dx.doi.org/10.5713/ajas.19.0642 Text en Copyright © 2021 by Animal Bioscience This is an open-access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Article
Binabaj, Fateme Bahri
Farhangfar, Seyyed Homayoun
Jafari, Majid
Inbreeding affected differently on observations distribution of a growth trait in Iranian Baluchi sheep
title Inbreeding affected differently on observations distribution of a growth trait in Iranian Baluchi sheep
title_full Inbreeding affected differently on observations distribution of a growth trait in Iranian Baluchi sheep
title_fullStr Inbreeding affected differently on observations distribution of a growth trait in Iranian Baluchi sheep
title_full_unstemmed Inbreeding affected differently on observations distribution of a growth trait in Iranian Baluchi sheep
title_short Inbreeding affected differently on observations distribution of a growth trait in Iranian Baluchi sheep
title_sort inbreeding affected differently on observations distribution of a growth trait in iranian baluchi sheep
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7961280/
https://www.ncbi.nlm.nih.gov/pubmed/32106655
http://dx.doi.org/10.5713/ajas.19.0642
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