Estimates of genetic parameters and cluster analysis for worm resistance and resilience in Santa Inês meat sheep

Estimates of genetic parameters and cluster analysis for worm resistance and resilience in Santa Inês meat sheep

Abstract: The objective of this work was to estimate genetic parameters for traits related to resistance to endoparasites in Santa Inês sheep, for a possible inclusion in sheep breeding programs, as well as to evaluate the additive genetic pattern of the animals using cluster analyzes, in order to assess whether there are groups within the population that can be used as candidates for selection for resistance to endoparasites. The studied traits were: Famacha score, fecal egg counts (FEC), packed cell volume (PCV), total plasma protein (TPP), body condition score (BCS), and body weight (BW). Heritability estimates ranged from 0.17 (0.05) for TPP to 0.31 (0.07) for BCS. The cluster analyzes based on the breeding values identified four clusters. Famacha and BCS can be recommended as selection criteria for resistance to hematophagous endoparasites because they can respond to selection and are easy to be measured. Animals from cluster 1 have great potential as candidates for selection because of their additive genetic pattern, taking into account body weight and endoparasite resistance due to higher breeding values for BW, BCS, PCV, and TPP and lower breeding values for Famacha and FEC.

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Main Authors: Oliveira,Elisa Junqueira, Savegnago,Rodrigo Pelicioni, Freitas,Luara Afonso de, Freitas,Anielly Paula, Maia,Suellen Rodrigues, Simili,Flávia Fernanda, Faro,Lenira El, Costa,Ricardo Lopes Dias da, Santana Júnior,Mário Luiz, Paz,Claudia Cristina Paro de
Format: Digital revista
Language:English
Published: Embrapa Secretaria de Pesquisa e Desenvolvimento 2018
Online Access:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018001201338
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spelling oai:scielo:S0100-204X20180012013382019-01-04Estimates of genetic parameters and cluster analysis for worm resistance and resilience in Santa Inês meat sheepOliveira,Elisa JunqueiraSavegnago,Rodrigo PelicioniFreitas,Luara Afonso deFreitas,Anielly PaulaMaia,Suellen RodriguesSimili,Flávia FernandaFaro,Lenira ElCosta,Ricardo Lopes Dias daSantana Júnior,Mário LuizPaz,Claudia Cristina Paro de cluster analysis Famacha genetic correlation heritability k-means multivariate analysis Abstract: The objective of this work was to estimate genetic parameters for traits related to resistance to endoparasites in Santa Inês sheep, for a possible inclusion in sheep breeding programs, as well as to evaluate the additive genetic pattern of the animals using cluster analyzes, in order to assess whether there are groups within the population that can be used as candidates for selection for resistance to endoparasites. The studied traits were: Famacha score, fecal egg counts (FEC), packed cell volume (PCV), total plasma protein (TPP), body condition score (BCS), and body weight (BW). Heritability estimates ranged from 0.17 (0.05) for TPP to 0.31 (0.07) for BCS. The cluster analyzes based on the breeding values identified four clusters. Famacha and BCS can be recommended as selection criteria for resistance to hematophagous endoparasites because they can respond to selection and are easy to be measured. Animals from cluster 1 have great potential as candidates for selection because of their additive genetic pattern, taking into account body weight and endoparasite resistance due to higher breeding values for BW, BCS, PCV, and TPP and lower breeding values for Famacha and FEC.info:eu-repo/semantics/openAccessEmbrapa Secretaria de Pesquisa e DesenvolvimentoPesquisa Agropecuária BrasileiraPesquisa Agropecuária Brasileira v.53 n.12 20182018-12-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018001201338en10.1590/s0100-204x2018001200006
institution SCIELO
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country Brasil
countrycode BR
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libraryname SciELO
language English
format Digital
author Oliveira,Elisa Junqueira
Savegnago,Rodrigo Pelicioni
Freitas,Luara Afonso de
Freitas,Anielly Paula
Maia,Suellen Rodrigues
Simili,Flávia Fernanda
Faro,Lenira El
Costa,Ricardo Lopes Dias da
Santana Júnior,Mário Luiz
Paz,Claudia Cristina Paro de
spellingShingle Oliveira,Elisa Junqueira
Savegnago,Rodrigo Pelicioni
Freitas,Luara Afonso de
Freitas,Anielly Paula
Maia,Suellen Rodrigues
Simili,Flávia Fernanda
Faro,Lenira El
Costa,Ricardo Lopes Dias da
Santana Júnior,Mário Luiz
Paz,Claudia Cristina Paro de
Estimates of genetic parameters and cluster analysis for worm resistance and resilience in Santa Inês meat sheep
author_facet Oliveira,Elisa Junqueira
Savegnago,Rodrigo Pelicioni
Freitas,Luara Afonso de
Freitas,Anielly Paula
Maia,Suellen Rodrigues
Simili,Flávia Fernanda
Faro,Lenira El
Costa,Ricardo Lopes Dias da
Santana Júnior,Mário Luiz
Paz,Claudia Cristina Paro de
author_sort Oliveira,Elisa Junqueira
title Estimates of genetic parameters and cluster analysis for worm resistance and resilience in Santa Inês meat sheep
title_short Estimates of genetic parameters and cluster analysis for worm resistance and resilience in Santa Inês meat sheep
title_full Estimates of genetic parameters and cluster analysis for worm resistance and resilience in Santa Inês meat sheep
title_fullStr Estimates of genetic parameters and cluster analysis for worm resistance and resilience in Santa Inês meat sheep
title_full_unstemmed Estimates of genetic parameters and cluster analysis for worm resistance and resilience in Santa Inês meat sheep
title_sort estimates of genetic parameters and cluster analysis for worm resistance and resilience in santa inês meat sheep
description Abstract: The objective of this work was to estimate genetic parameters for traits related to resistance to endoparasites in Santa Inês sheep, for a possible inclusion in sheep breeding programs, as well as to evaluate the additive genetic pattern of the animals using cluster analyzes, in order to assess whether there are groups within the population that can be used as candidates for selection for resistance to endoparasites. The studied traits were: Famacha score, fecal egg counts (FEC), packed cell volume (PCV), total plasma protein (TPP), body condition score (BCS), and body weight (BW). Heritability estimates ranged from 0.17 (0.05) for TPP to 0.31 (0.07) for BCS. The cluster analyzes based on the breeding values identified four clusters. Famacha and BCS can be recommended as selection criteria for resistance to hematophagous endoparasites because they can respond to selection and are easy to be measured. Animals from cluster 1 have great potential as candidates for selection because of their additive genetic pattern, taking into account body weight and endoparasite resistance due to higher breeding values for BW, BCS, PCV, and TPP and lower breeding values for Famacha and FEC.
publisher Embrapa Secretaria de Pesquisa e Desenvolvimento
publishDate 2018
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018001201338
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