Mapping QTL for early growth and maternal performance in sheep

Raadsma, H.W., Jonas, E., Zenger, K.R., Cavanah, C.A., Lam, M.K., and Thomson, P.C. (2009) Mapping QTL for early growth and maternal performance in sheep. In: Proceedings of the AAABG 18th Conference (18) pp. 640-643. From: 18th AAABG Conference 2009, 28 September - 1 October 2009, Barossa Valley, SA, Australia.

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This paper describes QTL for bodyweight, and growth rate between week 2 after birth up to 43 weeks of age, and maternal performance based on milk yield and milk energy content in Awassi-Merino backcross progeny. QTL were mapped using a population specific framework map with 50 QTL (LOD>2) mapped for body weight and growth rate, and six QTL for milk yield and milk energy content. The majority of QTL for bodyweight and growth showed a significant sex by QTL interaction with wethers showing stronger QTL effects than ewes. Fewer QTL were detected for body weight or growth in the period from 2 to 25 weeks (range 1-4 QTL) whereas for the period from 25-43 weeks and over the entire growth period a greater number of QTL were observed (range 5-8). Implementation of multiple QTL for early growth and maternal performance will be difficult in sheep with need for validation and tracking in each population.

Item ID: 49823
Item Type: Conference Item (Research - E1)
ISBN: 978-0-646-52103-9
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Date Deposited: 10 Aug 2017 02:23
FoR Codes: 07 AGRICULTURAL AND VETERINARY SCIENCES > 0702 Animal Production > 070201 Animal Breeding @ 100%
SEO Codes: 83 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 8305 Primary Animal Products > 830599 Primary Animal Products not elsewhere classified @ 100%
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