Genetic parameters for milk yield in Saanen and Alpina breed goats

Authors

  • Natália Irano Universidade Estadual de São Paulo
    • Annaiza Bignardi Universidade Estadual de São Paulo
      • Fernando Rey Universidade de São Paulo
        • Izabelle Teixeira Universidade Estadual de São Paulo
          • Lucia Albuquerque Universidade Estadual de São Paulo

            Keywords:

            Goat-milk production, Animal genetics, Goat milk

            Abstract

            The objective of this study was to estimate genetic parameters for 305 days milk yield (M305) in Saanen and Alpina breed goats. Data consisted of records from first to second lactations of goats belonging to herds participating in the program control productive and reproductive goats (PROCAPRI) from UNESP-FCAV-Jaboticabal-SP. The M305 was analyzed by repeatability and bi-trait models. The influence of fixed effects on the traits was analyzed preliminary analysis by the method of least squares. Variance components were estimated by restricted maximum likelihood method (REML), using the package Wombat. The duration of lactation, age of dam at calving, the herd, calving year and season of birth were important sources of variation for the M305. There was no significant difference between the breeds. Heritability and repeatability estimates obtained by repeatability model were 0.29 and 0.36, respectively. The repeatability estimate was 0.32. The heritability estimates obtained by the bi-trait models were similar and repeatability. Thus, a repeatability model might be indicated for its simplicity.

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            Published

            2011-12-07

            Issue

            Vol. 43 No. 2 (2012)

            Section

            Animal Science

            License

            Atribuição
            CC BY

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            How to Cite

            IRANO, Natália; BIGNARDI, Annaiza; REY, Fernando; TEIXEIRA, Izabelle; ALBUQUERQUE, Lucia. Genetic parameters for milk yield in Saanen and Alpina breed goats. Revista Ciência Agronômica, [S. l.], v. 43, n. 2, 2011. Disponível em: https://periodicos.ufc.br/revistacienciaagronomica/article/view/84253. Acesso em: 1 may. 2026.