Fecha/hora: 09/06/2024 12:20:42

Biblioteca(s): | INIA Las Brujas.
Fecha corriente: | 28/07/2021
Fecha de la última actualización: | 28/07/2021
Autoria: | RAMOS, Z.; BLAIR, H.T.; DE BARBIERI, I.; CIAPPESONI, G.; MONTOSSI, F.; KENYON, P.R.
Afiliación: | ZULLY MARGOT RAMOS ALVEZ, School of Agriculture and Environment, Massey University, New Zealand.; HUGH THOMAS BLAIR, School of Agriculture and Environment, Massey University, New Zealand.; LUIS IGNACIO DE BARBIERI ETCHEBERRY, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; CARLOS GABRIEL CIAPPESONI SCARONE, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; FABIO MARCELO MONTOSSI PORCHILE, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; PAUL RICHARD KENYON, School of Agriculture and Environment, Massey University, New Zealand.
Título: | Productivity and reproductive performance of mixed-age ewes across 20 years of selection for ultrafine wool in Uruguay.
Año de publicación: | 2021
Fuente/Imprenta: | Agriculture, 2021; 11(8):712. Doi: https://doi.org/10.3390/agriculture11080712
ISSN: | eISSN: 2077-0472
DOI: | 10.3390/agriculture11080712
Idioma: | Inglés

Notas:

Article history: Received 9 July 2021, Revised 21 July 2021, Accepted 25 July 2021, Published: 28 July 2021.
Academic Editor: Milan Shipka.
This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

Contenido:

ABSTRACT - This study reports the phenotypic trends for wool, growth, and reproductive traits in mixed-age ewes after twenty years of genetic selection. Data were obtained from the Merino nucleus flock in Uruguay between 1999 and 2020. Overall, the aim of this selection flock was to reduce the fiber diameter (FD) and increase both the clean fleece weight (CFW) and live weight (LW). Data on ewe wool traits, LW, body condition score (BCS), the total number of lambs weaned (TLW), and the total LW of lambs weaned (TWW) across all lambing opportunities (1?8 mating seasons) were analyzed. Between 1292 and 2063 ewes were measured, depending on the trait considered. Ewe FD decreased by approximately 3 µm (19?16 µm), whereas greasy fleece weight (GFW) increased by 0.2 kg. This improvement in wool traits was accompanied by increases in LW at mating (3 kg), decreases in BCS at mating (approximately by 1 unit), and a small positive change in TWW across years. This study demonstrated that increasing farmer income by selecting for finer wool, heavier fleeces, and heavier animals can be obtained without compromising ewe lifetime reproduction.
Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Palabras-Clave: | BODY CONDITION SCORE; LIFETIME REPRODUCTION; LIVE WEIGHT; SELECTION; SHEEP; WOOL.
Categoría del tema: | L01 Ganadería
URL: | https://www.mdpi.com/2077-0472/11/8/712/pdf
Registro original: | INIA Las Brujas (LB)
Ejemplares: | LB - (102804-1) - PXI - AP - DD - PP/AGRICULTURE/2021 -  -  - DIS