A quantitative trait locus for body conformation maps to bovine chromosome one in Japanese Black cattle

Malau-Aduli, Aduli Enoch, Niibayashi, Tomomi, Kojima, Takatoshi, Oshima, Kasunaga, Mizoguchi, Y., Sugimoto, Y., and Komatsu, Masanori (2003) A quantitative trait locus for body conformation maps to bovine chromosome one in Japanese Black cattle. In: Proceedings of the XIX International Congress of Genetics. 6.C.0973. p. 136. From: XIX International Congress of Genetics, 6-11 July 2003, Melbourne, VIC, Australia.

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Chromosomal regions of bovine chromosome one were scanned for the detection and mapping of segregating QTL influencing preweaning withers height, hip height, hip width, body length, chest width, chest depth, shoulder width, lumbar width, thurl width, pin bone width, rump length, cannon circumference, heart girth, abdominal width and abdominal girth. QTL analysis was performed by genotyping 132 half-sib progeny of 5 Japanese Black sires using 108 microsatellite DNA markers. Genotyped data on progeny and their sires were combined in a multi-point approach to calculate Identity-By-Descent (IBD) probability coefficients of inheriting allele 1 or 2 from the sire at specific chromosomal locations.The phenotypic data on progeny were regressed on these IBD coefficients in a within-common-parent regression analysis. A linear model containing the fixed effects of sex, parity and season of birth as well as age as a covariate, was fitted to the IBD coefficients and phenotypic data. Data were analyzed using QTL Express by generating an F-statistic through permutation tests at chromosome-wide significance thresholds over 1, 000 iterations at lcM intervals. A significant QTL for chest width was detected at 91cM in Sire 3. Suggestive QTL for thurl width, hip height, chest depth and abdominal girth were all located at 18cM in Sire 2. Other suggestive QTL detected were withers height (58cM) in Sire 5 and rump length (1 lcM), withers height (77cM) and chest depth (81cM) in Sire 1. The detection of these QTL boosts the prospect of implementing marker-assisted selection for body conformation traits in Japanese Black beef cattle.

Item ID: 55012
Item Type: Conference Item (Abstract / Summary)
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Date Deposited: 12 Sep 2018 02:51
FoR Codes: 07 AGRICULTURAL AND VETERINARY SCIENCES > 0702 Animal Production > 070201 Animal Breeding @ 100%
SEO Codes: 83 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 8303 Livestock Raising > 830301 Beef Cattle @ 100%
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