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1. Genotype × birth type or rearing-type interactions for growth and ultrasound scanning traits in Merino sheep

Author:
Moghaddar, N.,   et al.   ; Dakhlan, A.; van der Werf, J. H. J.;     Show all 3 Authors
Source:
Animal production science 2019 v.59 no.6 pp. 1016-1021
ISSN:
1836-0939
Subject:
Merino; birth weight; bivariate analysis; breeding value; dams (mothers); genetic correlation; genetic traits; genotype; genotype-environment interaction; lambs; models; phenotypic variation; rearing; sires; twins; ultrasonics; weaning weight
Abstract:
... This study explores the interaction between genetic potential for growth in Merino lambs and their birth type (BT) or rearing type (RT). Data on birthweight (BWT), weaning weight (WWT), post-weaning weight (PWWT), scan fat (PFAT) and eye muscle depth (PEMD) were used from 3920 single and 4492 twin-born lambs from 285 sires and 5279 dams. Univariate analysis showed a significant sire × BT interacti ...
DOI:
10.1071/AN17464

2. Genomic estimation of additive and dominance effects and impact of accounting for dominance on accuracy of genomic evaluation in sheep populations

Author:
Moghaddar, N.,   et al.   ; van der Werf, J. H. J.;     Show all 2 Author
Source:
Journal of animal breeding and genetics 2017 v.134 no.6 pp. 453-462
ISSN:
0931-2668
Subject:
body composition; breeding value; equations; genetic variance; genomics; genotype; heterosis; phenotypic variation; prediction; purebreds; sheep; single nucleotide polymorphism; statistical analysis; statistical models; variance
Abstract:
... The objectives of this study were to estimate the additive and dominance variance component of several weight and ultrasound scanned body composition traits in purebred and combined cross‐bred sheep populations based on single nucleotide polymorphism (SNP) marker genotypes and then to investigate the effect of fitting additive and dominance effects on accuracy of genomic evaluation. Additive and d ...
DOI:
10.1111/jbg.12287

3. Genomic prediction of weight and wool traits in a multi-breed sheep population

Author:
Moghaddar, N.,   et al.   ; Swan, A. A.; van der Werf, J. H. J.;     Show all 3 Authors
Source:
Animal production science 2014 v.54 no.5 pp. 544-549
ISSN:
1836-0939
Subject:
Border Leicester; Merino; breeding value; correlation; flocks; genotype; heritability; industry; prediction; progeny; sheep; single nucleotide polymorphism; wool; yearlings
Abstract:
... The objective of this study was to predict the accuracy of genomic prediction for 26 traits, including weight, muscle, fat, and wool quantity and quality traits, in Australian sheep based on a large, multi-breed reference population. The reference population consisted of two research flocks, with the main breeds being Merino, Border Leicester (BL), Poll Dorset (PD), and White Suffolk (WS). The gen ...
DOI:
10.1071/AN13129