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Open Access Article << Previous     |     Next >>   Contents Vol 51(9)

Improving the nutrition of Merino ewes during pregnancy increases the fleece weight and reduces the fibre diameter of their progeny’s wool during their lifetime and these effects can be predicted from the ewe’s liveweight profile

A. N. Thompson A C D G, M. B. Ferguson A C D, D. J. Gordon A E, G. A. Kearney A F, C. M. Oldham B and B. L. Paganoni B

A Department of Primary Industries Victoria, Private Bag 105, Hamilton, Vic. 3300, Australia.
B Department of Agriculture and Food Western Australia, 3 Baron-Hay Court, South Perth, WA 6151, Australia.
C Present address: Department of Agriculture and Food Western Australia, 3 Baron-Hay Court, South Perth, WA 6151, Australia.
D Present address: School of Veterinary and Biomedical Sciences, Murdoch University, 90 South Street, Murdoch, WA 6150, Australia.
E Present address: Rural Industries Skills Training, Private Bag 105, Hamilton, Vic. 3300, Australia.
F Present address: 36 Payne Street, Hamilton, Vic. 3300, Australia.
G Corresponding author. Email: andrew.thompson@agric.wa.gov.au

Animal Production Science 51(9) 794-804 http://dx.doi.org/10.1071/AN10161
Submitted: 27 August 2010  Accepted: 4 August 2011   Published: 14 September 2011
 
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Abstract

Nutrition of ewes during pregnancy can have permanent impacts on the production potential of their progeny. The hypothesis tested in the experiments reported in this paper was that improving the nutrition of Merino ewes during pregnancy and lactation increases the fleece weight and reduces the fibre diameter of their progeny’s wool during their lifetime. In addition, that these effects on the progeny’s wool production can be predicted from the ewe’s liveweight profile. At sites in Victoria and Western Australia in each of 2 years, a wide range in the liveweight and condition score profiles of Merino ewes was generated by varying the amount of supplements fed from joining to Day 100 of pregnancy and the amount of feed on offer grazed from Day 100 to weaning. The site in Victoria was based on perennial pastures and included both single- and twin-bearing ewes whereas the site in Western Australia was based on annual pastures and included single-bearing ewes only. The production and characteristics of wool from the progeny were measured until 51 months of age at the site in Victoria and 33 months of age at the site in Western Australia. The nutritional treatments and the resulting changes in ewe liveweight had significant impacts on the fleece weight and to a lesser extent the fibre diameter of wool produced by their progeny, but there were no consistent effects on other characteristics of progeny fleece wool. The fleece weight of the progeny was related to the liveweight change during pregnancy of their mothers (P < 0.05) and the relationships were similar for the two experiments at each site. At the site in Victoria, a loss of 10 kg in ewe liveweight between joining and Day 100 of pregnancy reduced fleece weight by ~0.2 kg at each shearing until 51 months of age whereas gaining 10 kg from Day 100 of pregnancy to lambing had the opposite effect. The effect of changes in ewe liveweight during late pregnancy on the fleece weight of their progeny at each shearing was of similar magnitude at the site in Western Australia. When evident, the effect of the ewe liveweight profile on the fibre diameter of progeny wool was opposite to the effect on clean fleece weight and the effect of poor nutrition in early to mid pregnancy could be completely overcome by improving nutrition during late pregnancy. Twin-born and reared progeny produced ~0.3 kg less clean wool at each shearing (P < 0.001) that was 0.3-μm broader (P < 0.001) than that from single-born progeny at the site in Victoria. However, the effects of varying ewe nutrition and ewe liveweight change during pregnancy on fleece weight and fibre diameter of progeny wool were similar (P > 0.05) for both single- and twin-born or reared progeny. Overall, these results supported our hypothesis and it is clear that the nutritional management of Merino ewes during pregnancy is important for optimal wool production from their progeny during their lifetime.



References

Behrendt R, van Burgel AJ, Bailey A, Barber P, Curnow M, Gordon DJ, Hocking Edwards JE, Oldham CM, Thompson AN (2011) On-farm paddock-scale comparisons across southern Australia confirm that increasing the nutrition of Merino ewes improves their production and the lifetime performance of their progeny. Animal Production Science 51, 805–812.
| CrossRef |

Brown DJ, Ball AJ, Mortimer R, Oppenheimer M (2002) Incorporating SRS(R)/Elite wool traits into genetic evaluations for Merino sheep 1. Phenotypic variation and heritabilities. Wool Technology and Sheep Breeding 50, 373–377.

Brown DJ, Mortimer RL, Mortimer ML (2006) Genetic aspects of greasy wool colour assessments in Merino sheep. Proceedings of the Association of Animal Breeding and Genetics 14, 119–122.

Denney GD (1990) Effects of preweaning farm environment on adult wool production of Merino sheep. Australian Journal of Experimental Agriculture 30, 17–25.
| CrossRef |

Everitt GC (1967) Residual effects of prenatal nutrition on the postnatal performance of Merino sheep. Proceedings of the New Zealand Society of Animal Production 27, 52–68.

Ferguson MB, Thompson AN, Gordon DJ, Hyder MW, Kearney GA, Oldham CM, Paganoni BL (2011) The wool production and reproduction of Merino ewes can be predicted from changes in liveweight during pregnancy and lactation. Animal Production Science 51, 763–775.
| CrossRef |

Genstat Committee (2008) ‘Genstat for Windows.’ 11th edn. (VSN International: Hertfordshire, UK)

Hocking Edwards JE (1999) Reduction in wool follicles prior to birth in Merino sheep. Reproduction, Fertility and Development 11, 229–234.
| CrossRef | CAS |

Hocking Edwards JE, Birtles MJ, Harris PM, Parry A, Paterson E, Wickham GA, McCutcheon SN (1994) Prenatal follicle development in Romney, Merino and Merino-Romney cross sheep. Proceedings of the New Zealand Society of Animal Production 54, 131–134.

Hocking Edwards JE, Copping KJ, Thompson AN (2011) Managing the nutrition of twin-bearing ewes during pregnancy using Lifetimewool recommendations increases production of twin lambs. Animal Production Science 51, 813–820.
| CrossRef |

Huisman AE, Brown DJ, Ball AJ, Graser HU (2008) Genetic parameters for bodyweight, wool, and disease resistance and reproduction traits in Merino sheep. 1. Description of traits, model comparison, variance components and their ratios. Australian Journal of Experimental Agriculture 48, 1177–1185.
| CrossRef |

Hutchison G, Mellor DJ (1983) Effects of maternal nutrition on the initiation of secondary wool follicles in foetal sheep. Journal of Comparative Pathology 93, 577–583.
| CAS |

Jackson N, Nay T, Turner HN (1975) Response to selection in Australian Merino sheep. VII. Phenotypic and genetic parameters for some wool follicle characteristics and their correlation with wool and body traits. Australian Journal of Agricultural Research 26, 937–957.
| CrossRef |

Jefferies BC (1961) Body condition scoring and its use in management. Tasmanian Journal of Agriculture 32, 19–21.

Kelly RW (1992) Lamb mortality and growth to weaning in commercial Merino flocks in Western Australia. Australian Journal of Agricultural Research 43, 1399–1416.
| CrossRef |

Kelly RW, Macleod I, Hynd P, Greeff JC (1996) Nutrition during fetal life alters annual wool production and quality in young Merino sheep. Australian Journal of Experimental Agriculture 36, 259–267.
| CrossRef |

Kelly RW, Greeff JC, Macleod I (2006) Lifetime changes in wool production of Merino sheep following differential feeding in fetal and early life. Australian Journal of Agricultural Research 57, 867–876.
| CrossRef |

Kleemann DO, Walker SK (2005) Fertility in South Australian commercial Merino flocks: relationships between reproductive traits and environmental cues. Theriogenology 63, 2416–2433.

Oldham CM, Thompson AN, Ferguson MB, Gordon DJ, Kearney GA, Paganoni BL (2011) The birthweight and survival of Merino lambs can be predicted from the profile of liveweight change of their mothers during pregnancy. Animal Production Science 51, 776–783.
| CrossRef |

Robinson JJ, Sinclair KD, McEvoy TG (1999) Nutritional effects on foetal growth. Animal Science (Penicuik, Scotland) 68, 315–331.

Safari E, Fogarty NM, Gilmour AR (2005) A review of genetic parameter estimates for wool, growth, meat and reproduction traits in sheep. Livestock Production Science 92, 271–289.
| CrossRef |

Saul G, Kearney G, Borg D (2011) Pasture systems to improve productivity of sheep in south-western Victoria. 2. Animal production from ewes and lambs. Animal Production Science in press. 51,

Schinckel PG (1955) The postnatal development of the skin follicle population in a strain of Merino sheep. Australian Journal of Agricultural Research 6, 68–76.
| CrossRef |

Schinckel PG, Short BF (1961) The influence of nutritional level during prenatal and early postnatal life on adult fleece and body characteristics. Australian Journal of Agricultural Research 12, 176–202.
| CrossRef |

Short BF (1955a) Development of the secondary follicle population in sheep. Australian Journal of Agricultural Research 6, 62–67.
| CrossRef |

Short BF (1955b) Developmental modification of fleece structure by adverse maternal nutrition. Australian Journal of Agricultural Research 6, 863–872.
| CrossRef |

Thompson AN, Doyle PT, Grimm M (1994) Effects of differential grazing of annual pastures in spring on sheep and wool production. Australian Journal of Agricultural Research 45, 367–389.
| CrossRef |

Thompson AN, Ferguson MB, Campbell AJD, Gordon DJ, Kearney GA, Oldham CM, Paganoni BL (2011) Improving the nutrition of Merino ewes during pregnancy and lactation increases weaning weight and survival of progeny but does not affect their mature size. Animal Production Science 51, 784–793.
| CrossRef |

Wheeler JL, Reardon TF, Hedges DA, Rocks RL (1971) The contribution of the conceptus to weight change in pregnant Merino ewes at pasture. The Journal of Agricultural Science 76, 347–353.
| CrossRef |

Wheeler JL, Hedges DA, Mulcahy C (1977) The use of dyebanding for measuring wool production and fleece tip wear in rugged and unrugged sheep. Australian Journal of Agricultural Research 28, 721–735.
| CrossRef |

Young JM, Thompson AN, Oldham CM (2008) Increasing profitability by pregnancy scanning ewes. Livestock Updates, Department of Agriculture and Food, WA, 1–2 July 2008, Perth.

Young JM, Thompson AN, Curnow M, Oldham CM (2011) Whole-farm profit and the optimum maternal liveweight profile of Merino ewe flocks lambing in winter and spring are influenced by the effects of ewe nutrition on the progeny’s survival and lifetime wool production. Animal Production Science 51, 821–833.
| CrossRef |


   
 


    
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