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. 2021 Feb 5;11(2):409.
doi: 10.3390/ani11020409.

Selection Criteria for Improving Fertility in Spanish Goat Breeds: Estimation of Genetic Parameters and Designing Selection Indices for Optimal Genetic Responses

Chiraz Ziadi  1 , Eva Muñoz-Mejías  2 , Manuel Sánchez  3 , María Dolores López  4 , Olga González-Casquet  5 , Antonio Molina  1
Affiliations

Selection Criteria for Improving Fertility in Spanish Goat Breeds: Estimation of Genetic Parameters and Designing Selection Indices for Optimal Genetic Responses

Chiraz Ziadi et al. Animals (Basel). .

Abstract

The aim of this study was to estimate genetic parameters for several female fertility criteria and to choose the most suitable selection index in Spanish Florida and Payoya goat breeds. In this study, we analyzed as fertility traits, the age at first kidding (AgFiKid), and the interval between the first and second kiddings (Int12Kid), between the second, third, and remaining kiddings (Int3toKid), and between all kiddings (IntAllKid) in 51,123 and 22,049 Florida and Payoya females, respectively. Genetic parameters were estimated by fitting animal models using restricted maximum likelihood (REML) methodology. We proposed six selection indices to compare the genetic responses for all traits included, based on a new selection index theory. The heritability and repeatability estimates of the traits were low, as expected. The genetic correlations among fertility traits covered a wide range of values from 0.07 (AgFiKid-Int12Kid) to 0.71 (Int3toKid-IntAllKid) in Florida and from -0.02 (AgFiKid-Int12Kid) to 0.82 (Int3toKid-IntAllKid) in Payoya. Overall, the results of this study indicate that IntAllKid gives the highest genetic responses in both breeds but is expressed late in a female's life. However, AgFiKid and Int12Kid could be recommended as early selection criteria for female fertility in both breeds.

Keywords: dairy goat; female fertility; genetic parameters; selection index.

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Conflict of interest statement

The authors declare no conflict of interest.

References

    1. Menéndez-Buxadera A., Romero F., González O., Arrebola F., Molina A. Estimates of genetic parameters of milk yield and milk composition using random regression model in Payoya goat. ITEA Inf. Tec. Econ. Agrar. 2008;104:127–132.
    1. Menéndez-Buxadera A., Molina A., Arrebola F., Gil M.J., Serradilla J.M. Random regression analysis of milk yield and milk composition in the first and second lactations of Murciano-Granadina goats. J. Dairy Sci. 2010;93:2718–2726. doi: 10.3168/jds.2009-2571. - DOI - PubMed
    1. Molina A., Muñoz E., Díaz C., Menéndez-Buxadera A., Ramón M., Sánchez M., Carabaño M.J., Serradilla J.M. Goat genomic selection: Impact of the integration of genomic information in the genetic evaluations of the Spanish Florida goats. Small Rumin. Res. 2018;163:72–75. doi: 10.1016/j.smallrumres.2017.12.010. - DOI
    1. Pryce J.E., Royal M.D., Garnsworthy P.C., Mao I.L. Fertility in the high-producing dairy cow. Livest. Prod. Sci. 2004;86:125–135. doi: 10.1016/S0301-6226(03)00145-3. - DOI
    1. Andersen-Ranberg I.M., Klemetsdal G., Heringstad B., Steine T. Heritabilities, genetic correlations, and genetic change for female fertility and protein yield in Norwegian dairy cattle. J. Dairy Sci. 2005;88:348–355. doi: 10.3168/jds.S0022-0302(05)72694-1. - DOI - PubMed

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