The Revista Brasileira de Zootecnia (RBZ) is a publication dedicated to the broad field of Animal Science. We publish high-quality, original scientific research that spans across diverse areas within the discipline. The scope of RBZ encompasses a wide range of topics, including aquaculture, biometeorology and animal welfare, forage crops and grasslands, animal and forage plants breeding and genetics, animal reproduction, ruminant and non-ruminant nutrition, meat science and muscle biology, precision livestock, and animal production systems and agribusiness.
The Revista Brasileira de Zootecnia (RBZ) is a publication dedicated to the broad field of Animal Science. We publish high-quality, original scientific research that spans across diverse areas within the discipline. The scope of RBZ encompasses a wide range of topics, including aquaculture, biometeorology and animal welfare, forage crops and grasslands, animal and forage plants breeding and genetics, animal reproduction, ruminant and non-ruminant nutrition, meat science and muscle biology, precision livestock, and animal production systems and agribusiness.
The Revista Brasileira de Zootecnia (RBZ) is a publication dedicated to the broad field of Animal Science. We publish high-quality, original scientific research that spans across diverse areas within the discipline. The scope of RBZ encompasses a wide range of topics, including aquaculture, biometeorology and animal welfare, forage crops and grasslands, animal and forage plants breeding and genetics, animal reproduction, ruminant and non-ruminant nutrition, meat science and muscle biology, precision livestock, and animal production systems and agribusiness.
Data of Large White (LW), Landrace (LD) and Duroc (DU) swine were used to estimate the genetic trends for adjusted weight at 70-days old (AW70) in kg, average daily gain (ADG) in g and backfat thickness(BT) in cm. The genetic trends were estimated by regression of the averages of trait genetic values in function of the animal birth year. The estimates of the genetic trend for AW70 (LW = -0.22; LD = -0.24; DU = -0.57) were negative, possibly due to a greater emphasis given in the selection process for ADG and BT and to the correlations between these traits. The estimates of the genetic trend for ADG (LW = 14.11; LD = 9.81; DU = 2.75) and BT (LW = -0.07; LD = -0.05; DU = -0.04) are in accordance with the objectives of the genetic program and with the existing correlation between these traits as well.
Genetic trends in performance traits of Large White, Landrace and Duroc swine breeds
Costa,André Ribeiro Corrêa da and Lopes,Paulo Sávio and Torres,Robledo de Almeida and Euclydes,Ricardo Frederico and Regazzi,Adair José and Silva,Martinho de Almeida e and Pires,Aldrin Vieira. Genetic trends in performance traits of Large White, Landrace and Duroc swine breeds. R. Bras. Zootec. [online]. 2001, vol.30, 2, [cited 2026-04-23], pp.348-352. Available from: <https://rbz.org.br/article/genetic-trends-in-performance-traits-of-large-white-landrace-and-duroc-swine-breeds/>. ISSN 1516-3598. https://doi.org/10.1590/S1516-35982001000200008.
Costa,André Ribeiro Corrêa da; Lopes,Paulo Sávio; Torres,Robledo de Almeida; Euclydes,Ricardo Frederico; Regazzi,Adair José; Silva,Martinho de Almeida e; Pires,Aldrin Vieira. Genetic trends in performance traits of Large White, Landrace and Duroc swine breeds. R. Bras. Zootec., v.30, 2, p. 348-352. Apr. 2001. Available from: <https://rbz.org.br/article/genetic-trends-in-performance-traits-of-large-white-landrace-and-duroc-swine-breeds/>. acess on 23 Apr. 2026. https://doi.org/10.1590/S1516-35982001000200008.
Costa,André Ribeiro Corrêa da, & Lopes,Paulo Sávio, & Torres,Robledo de Almeida, & Euclydes,Ricardo Frederico, & Regazzi,Adair José, & Silva,Martinho de Almeida e, & Pires,Aldrin Vieira. (2001). Genetic trends in performance traits of Large White, Landrace and Duroc swine breeds. R. Bras. Zootec., 30(2) , 348-352. https://doi.org/10.1590/S1516-35982001000200008.
CostaAndré Ribeiro Corrêa da, LopesPaulo Sávio, TorresRobledo de Almeida, EuclydesRicardo Frederico, RegazziAdair José, SilvaMartinho de Almeida e, PiresAldrin Vieira. Genetic trends in performance traits of Large White, Landrace and Duroc swine breeds. R. Bras. Zootec. [Internet]. 2001 Apr [cited 2026 Apr 23]; 30(2): 348-352. Available from: https://rbz.org.br/article/genetic-trends-in-performance-traits-of-large-white-landrace-and-duroc-swine-breeds/. https://doi.org/10.1590/S1516-35982001000200008.
Figure 6
Differential abundance for the species Faecalibacterium prausnitzii (A) and Megamonas funiformis (B).
