Polymorphisms in eggshell organic matrix genes are associated with eggshell quality measurements in pedigree Rhode Island Red hens |
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| Authors: | Dunn I C Joseph N T Bain M Edmond A Wilson P W Milona P Nys Y Gautron J Schmutz M Preisinger R Waddington D |
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| Institution: | The Roslin Institute and R(D)SVS, University of Edinburgh, Roslin, Midlothian EH25 9PS, UK;. Division of Cell Sciences, ICM, University of Glasgow Veterinary School, Glasgow G61 1QH, UK;. INRA, UR83 Recherches Avicoles, 37380 Nouzilly, France;. Lohmann Tierzucht, PO Box 4602, 7454 Cuxhaven, Germany |
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| Abstract: | Novel and traditional eggshell quality measurements were made from up to 2000 commercial pedigree hens for a candidate gene association analysis with organic eggshell matrix genes: ovocleidin-116 , osteopontin ( SPP1 ), ovocalyxin-32 ( RARRES1 ), ovotransferrin ( LTF ), ovalbumin and ovocalyxin-36 , as well as key genes in the maintenance and function of the shell gland estrogen receptor ( ESR1 ) and carbonic anhydrase II ( CAII )]. Associations were found for (i) ovalbumin with breaking strength and shell thickness; (ii) ovocleidin-116 with elastic modulus, shell thickness and egg shape; (iii) RARRES1 with mammillary layer thickness; (iv) ESR1 with dynamic stiffness; (v) SPP1 with fracture toughness and (vi) CAII with egg shape. The marker effects are as large as 17% of trait standard deviations and could be used to improve eggshell quality. |
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| Keywords: | eggshell quality single nucleotide polymorphisms |
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