Dynamic behavior of egg weight in free-range hens discriminated by productive indicators at sexual maturity
DOI:
https://doi.org/10.19137/cienvet202022201Keywords:
sexual precocity, body weight, egg weight, laying regularity, laying uniformity, Weatherup & Foster modelAbstract
The effects on the dynamic pattern of egg weight of five traits at sexual maturity were characterized in Campero Casilda hens. When the first egg was laid, body weight, age (an indicator of sexual precocity), weight of the first 10 eggs (an indicator of their initial weight), days needed to lay them (an indicator of regularity) and coefficient of variation of these weights (an indicator of uniformity) were recorded. All the eggs laid between sexual maturity and 72 weeks of age was weighed. Longitudinal data relating weekly average egg weight versus laying age were adjusted by non-linear regression with the Weatherup & Foster model. Birds were categorized by the values of each trait measured at sexual maturity and the category effect on the estimators of the function parameters was evaluated. Less precocious birds were heavier and laid larger eggs at the beginning of the cycle and in the
asymptote, without differences on the egg weight maturation rate, in comparison to those more precocious. The latter began the laying period irregularly, requiring a greater number of days to lay the first 10 eggs and the weight of these had a higher coefficient of variation. The
birds that began laying more uniform eggs in weight maintained that difference throughout the curve. Early selection of birds that begin laying at an older age, with greater body weight, more regularly and with heavier eggs uniform in size would show a favorable dynamic pattern in egg weight.
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References
Yu MW, Robinson FE, Charles RG, Weingardt R. Effect of feed allowance during rearing and breeding on female broiler breeders. 2. Ovarian morphology and production. Poult. Sci. 1992a; 71 (10): 1750-1761.
Yu MW, Robinson FE, Etches RJ. Effect of feed allowance during rearing and breeding on female broiler breeders. 3. Ovarian steroidogenesis. Poult Sci. 1992b.; 71 (10): 1762-1767.
Lewis PD, Morris TR, Perry GC. A model for predicting the age at sexual maturity for
growing pullets of layer strains given a single change in photoperiod. J. Agric. Sci.2002; 138 (4): 441-458.
Bornstein S, Plavnk I, Lev Y. Body weight and/or fatness as potential determinants of the onset of egg production in broiler breeder hen. Br. Poult. Sci.1984; 25 (3): 323-341.
Brody TB, Siegel PB, Cherry JA. Age, body weight and body composition requirements for the onset of sexual maturity of dwarf and normal chickens. Br. Poult. Sci. 1984;25(2): 245-52.
Katanbaf MN, Dunnington EA, Siegel PB. Restricted feeding in early and late-feathering chickens. 2. Reproductive responses. Poult. Sci. 1989;68 (3): 352-358.
Soller M, Eitan Y, Brody T. Effect of diet and early quantitative feed restriction on the minimum weight requirement for the onset of sexual maturity in White Rock broiler breeders. Poult. Sci.1984; 63 (6): 1255-1261.
Xu H, Zeng H, Luo C, Zhang D, Wang Q, Sun L, et al. Genetic effects of polymorphisms in candidate genes and the QTL region on chicken age at first egg. 2011. BMC genetics, 12: 33.
Johnson PA. Follicle selection in the avian ovary. Reprod. Domest. Anim.2012; 47 (Suppl 4):283–287.
Canet ZE, Romera BM, Fain Binda V, Terzaghi A, Dottavio AM, Di Masso RJ. Indicadores productivos a la madurez sexual en poblaciones experimentales de ponedoras camperas. Rev. Arg. Prod. Anim. 2012;32 (1): 37-46.
Romera BM, Canet ZE, Ledesma M, Librera JE, Advínculo SA, Martines A. et al. Variancia intrapoblacional para caracteres a la madurez sexual en gallinas del cruzamiento Campero Casilda. Revista FAVE – Sección Ciencias Veterinarias 2019; 18(1): 30-35.
Canet ZE, Advínculo SA, Fernández R, Martines A, Librera JE, Dottavio AM et al. Caracteres productivos a la madurez sexual y peso del huevo en función de la edad de
postura en tres grupos genéticos de gallinas camperas. Compendio de Ciencias Veterinarias2014; 4 (1): 7-12.
Bonino M. Pollo Campero. Protocolo para la certificación. INTA Pergamino.1997.
Weatherup STC, Foster WH. A description of the curve relating egg weight and age
of hen. Br. Poult. Sci.1980; 21 (6): 511-519.
Sheskin DJ. Handbook of parametric and nonparametric statistical procedures. 5th Ed Chapman & Hall, Boca Raton, Fl, USA. 2011.
Shale BA, Pasternak H. Increment of egg weight with hen age in various commercial avian species. Br. Poult. Sci.1993; 34(5): 915-924.
Cowen NS, Bohren BB, McKean HE. Increase in pullet egg size with age. Poult. Sci.
; 43 (2): 482-486.
Roland DA. Factors influencing shell quality of aging hens. Poult. Sci.1979; 58 (4):
-777.
Yoo BH, Sheldon BL, Podger RN. Genetic parameters for egg weight v. age curve, and other egg production and egg weight traits, in synthetic lines of chickens. Aust. J. Agric. Res.1983; 34 (1): 85-97.
Wolc A, Arango J, Settar P, Fulton JE, O’Sullivan NP, Preisinger R, et al. Genome-wide association analysis and genetic architecture of egg weight and egg uniformity in layer chickens. Anim. Genet. 2012;43(Suppl. 1):87–96.
Nangsuay A, Ruangpanit Y, Meijerhof R, Attamangkune S. Yolk absorption and embryo development of small and large eggs originating from young and old breeder hens. Poult. Sci. 2011;90 (11): 2648–2655.
Yi G, Liu W, Li J, Zheng J, Qu L, Xu G, et al. Genetic analysis for dynamic changes of egg weight in 2 chicken lines. Poult. Sci. 2014;93 (12):2963–2969.
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