Preliminary genetic parameters for flystrike and its association with production traits in Australian Merino sheep

E Dehnavi; A A Swan; A M M Ramsay; G Burbidge; D J Brown

Preliminary genetic parameters for flystrike and its association with production traits in Australian Merino sheep

E Dehnavi
, A A Swan
, A M M Ramsay
, G Burbidge
, D J Brown

Animal Genetics and Breeding Unit

Research output: Contribution to journal › Conference article › peer-review

Abstract

This study explored the phenotypic and genetic variation in breech flystrike and its relationship with production traits in the Connemara Merino ram breeding flock. Yearling breech strike (struck/non-struck) had a low heritability of 0.09±0.04 when using a binomial model. Heritability estimates for production traits ranged from 0.12±0.04 (for faecal worm egg count) to 0.70±0.07 (for staple length). Genetic correlations between breech strike and production traits varied from negative (-0.25±0.24 for fibre diameter) to high positive (0.70±0.21 for dag score), illustrating both favourable and unfavourable relationships that will have implications for future selection programs incorporating breech strike resistance with production traits.

Original language	English
Pages (from-to)	354-357
Journal	Proceedings of the Association for the Advancement of Animal Breeding and Genetics
Volume	25
Publication status	Published - 26 Jul 2023
Event	AAABG 2023: 25th Conference of the Association for the Advancement of Animal Breeding and Genetics - The University Club of Western Australia, Perth, Australia Duration: 26 Jul 2023 → 28 Jul 2023

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title = "Preliminary genetic parameters for flystrike and its association with production traits in Australian Merino sheep",

abstract = "This study explored the phenotypic and genetic variation in breech flystrike and its relationship with production traits in the Connemara Merino ram breeding flock. Yearling breech strike (struck/non-struck) had a low heritability of 0.09±0.04 when using a binomial model. Heritability estimates for production traits ranged from 0.12±0.04 (for faecal worm egg count) to 0.70±0.07 (for staple length). Genetic correlations between breech strike and production traits varied from negative (-0.25±0.24 for fibre diameter) to high positive (0.70±0.21 for dag score), illustrating both favourable and unfavourable relationships that will have implications for future selection programs incorporating breech strike resistance with production traits. ",

author = "E Dehnavi and Swan, \{A A\} and Ramsay, \{A M M\} and G Burbidge and Brown, \{D J\}",

year = "2023",

month = jul,

day = "26",

language = "English",

volume = "25",

pages = "354--357",

journal = "Proceedings of the Association for the Advancement of Animal Breeding and Genetics",

issn = "1328-3227",

publisher = "Association for the Advancement of Animal Breeding and Genetics (AAABG)",

note = "AAABG 2023: 25th Conference of the Association for the Advancement of Animal Breeding and Genetics ; Conference date: 26-07-2023 Through 28-07-2023",

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TY - JOUR

T1 - Preliminary genetic parameters for flystrike and its association with production traits in Australian Merino sheep

AU - Dehnavi, E

AU - Swan, A A

AU - Ramsay, A M M

AU - Burbidge, G

AU - Brown, D J

PY - 2023/7/26

Y1 - 2023/7/26

N2 - This study explored the phenotypic and genetic variation in breech flystrike and its relationship with production traits in the Connemara Merino ram breeding flock. Yearling breech strike (struck/non-struck) had a low heritability of 0.09±0.04 when using a binomial model. Heritability estimates for production traits ranged from 0.12±0.04 (for faecal worm egg count) to 0.70±0.07 (for staple length). Genetic correlations between breech strike and production traits varied from negative (-0.25±0.24 for fibre diameter) to high positive (0.70±0.21 for dag score), illustrating both favourable and unfavourable relationships that will have implications for future selection programs incorporating breech strike resistance with production traits.

AB - This study explored the phenotypic and genetic variation in breech flystrike and its relationship with production traits in the Connemara Merino ram breeding flock. Yearling breech strike (struck/non-struck) had a low heritability of 0.09±0.04 when using a binomial model. Heritability estimates for production traits ranged from 0.12±0.04 (for faecal worm egg count) to 0.70±0.07 (for staple length). Genetic correlations between breech strike and production traits varied from negative (-0.25±0.24 for fibre diameter) to high positive (0.70±0.21 for dag score), illustrating both favourable and unfavourable relationships that will have implications for future selection programs incorporating breech strike resistance with production traits.

UR - http://www.aaabg.org/aaabghome/proceedings25.php

M3 - Conference article

SN - 1328-3227

VL - 25

SP - 354

EP - 357

JO - Proceedings of the Association for the Advancement of Animal Breeding and Genetics

JF - Proceedings of the Association for the Advancement of Animal Breeding and Genetics

T2 - AAABG 2023: 25th Conference of the Association for the Advancement of Animal Breeding and Genetics

Y2 - 26 July 2023 through 28 July 2023

ER -

Preliminary genetic parameters for flystrike and its association with production traits in Australian Merino sheep

Abstract

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