@article {3672,
	title = {Genomic evaluations of sheep in New Zealand},
	journal = {New Zealand Journal of Animal Science and Production},
	volume = {81},
	year = {2021},
	month = {01/2022},
	pages = {106-111},
	address = {Online},
	abstract = {Many New Zealand equine owners/stud managers rely on body condition to adjust feed supply for weight management, rather than objective weigh scales. This cohort observational study examined the inter-relationship of pasture supply with monthly BCS and live weight (LW) in three groups (n = 7, 8, 9) of grazing-horses of median 6/9 BCS (range 4-8). Dry-matter (DM) intake was estimated from weekly pasture mass (using rising-plate meter), monthly pasture cuts, and fortnightly LW records. Total pasture DM at the start of grazing ranged from 559 to 3511 kg DM/ha, and grazed lawns (nutritive areas) ranged from 364 to 2601 kg DM/ha. Total estimated DM offered (including hay when offered) ranged from 1.46 to 26.37 kg DM/horse/day (0.3\% to 5.3\% of horses LW). Within-horse maximum monthly gains and losses were 8\% LW and -13\% LW respectively. Median monthly BCS change was 0/9 (range -2/9 to 1/9). There was no significant association between monthly changes in LW and BCS, indicating BCS may lack the sensitivity to manage weight. During periods of reduced DMI (below estimated maintenance) there were no significant decreases in LW or BCS. These data implied that the horses may have altered transit time to improve the relative digestibility of the limited feed on offer.

Keywords: horse; weight; body condition score; pasture; intake},
	issn = {1176-5283},
	author = {Lee AM and Newman S-AN and Dodds KG and Nilforooshan MA and Auvray B and McIntyre S and Campbell D}
}
@conference {75918,
	title = {BRIEF COMMUNICATION: Genomic selection in the New Zealand Sheep industry using the Ovine SNP50 Beadchip},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {71},
	year = {2011},
	month = {Jan},
	pages = {263-265},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	address = {Invercargill},
	abstract = {The Illumina OvineSNP50 BeadChip is a single nucleotide polymorphism (SNP) microarray targeting 54,241 evenly spaced SNPs on the sheep genome, developed by Illumina in collaboration with AgResearch, Baylor, UCSC, CSIRO, and the USDA as part of the International Sheep Genomics Consortium. It was used to genotype key... Continued},
	issn = {1176-5283},
	author = {Auvray B and Dodds KG and McEwan JC}
}
@conference {41782,
	title = {SNiP and cut: Quantifying the potential benefits of genomic selection tools for genetic fault elimination in sheep},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {68},
	year = {2008},
	month = {Jan},
	pages = {33-36},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	address = {Brisbane, Australia},
	abstract = {Whole genome single nucleotide polymorphism marker (SNP) technologies are rapidly being developed and could well play a role in the future selection of farmed animals. In sheep, work is being carried out to identify SNP{\textquoteleft}s associated with economically important production traits and disease resistance. Stud sheep breeders routinely cull up to 30\% of lambs born due to a variety of faults. Despite this culling pressure, the faults keep occurring, suggesting low heritability, recessive inheritance or incomplete penetration of fault causing genes. The objective of this paper was to identify the potential of SNP fault detection and elimination in sheep. Simulation was used to predict changes in gene frequencies and in an index of genetic merit of production traits over time when between two and 30 SNPs were used to aid selection. The SNPs are assumed to predict the presence of deleterious recessive genes. As selection pressure applied to individual or combination SNPs increased, the rate of increase in production trait genetic merit slowed down. Thus, a balance would be required between the emphasis on SNPs actively used to select against genetic faults, relative to emphasis on genetic merit. This work identified scope for substantial economic benefits from application of SNP technology for removal of faults to both stud breeders and commercial sheep farmers. },
	issn = {1176-5283},
	author = {Sise JA and Auvray B and Dodds KG and Amer PR}
}
@conference {41973,
	title = {Prospects for genome wide selection in the New Zealand livestock industries},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {67},
	year = {2007},
	month = {Jan},
	pages = {162-168},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	address = {Wanaka},
	abstract = {A number of DNA marker applications aid genetic selection within subpopulations of New Zealand{\textquoteright}s livestock farming industries. Advances in genomic tools have opened the possibility of genotyping individuals for a large set of markers, enough to have a large proportion of the genome {\textquoteleft}tagged{\textquoteright} with at least one of these markers. This creates opportunities for genome wide selection (GWS) {\textendash} the selection of breeding animals based on very large numbers of marker genotypes. There are a number of requirements for GWS to work, including the existence of genotyping technology to provide genotypes at a sufficient density, tractable statistical methods for estimating marker  effects to use in prediction models and suitably phenotyped populations which when genotyped allow estimation of relationships between markers and traits. Additional phenotyped populations are required to validate their predictive ability and demonstrate economic benefits to breeders and to the commercial tier. A high density genotyping platform is available for cattle, but may need further developments. Plans are underway for a similar platform for sheep, but not for deer. The dairy industry is well placed to implement GWS, as there is a large bank of DNA samples of industry sires representing most of the genome variation present. Genotyping these animals will allow marker effects to be estimated and the reduced generation interval arising from selecting young sires should easily overcome any decrease in selection accuracy compared with progeny testing. Industry structures are likely to evolve to allow a return to entities undertaking GWS. GWS will be mostbeneficial for traits with low heritability, that cannot be measured on selected parents and/or that are expensive to measure. Genes of known effect may continue to be accounted for individually, particularly if they exhibit non-additive effects.},
	issn = {1176-5283},
	author = {Dodds KG and Amer PR and Spelman RJ and Archer JA and Auvray B}
}
