Genetic trend estimates for milk yield production and fertility traits of the Girolando cattle in Brazil
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- 作者：Ali William Canaza-Cayoa ; Jaime Araú ; jo Cobucic ; jaime.cobuci@ufrgs.br" class="auth_mail" title="E-mail the corresponding author ; Paulo Sá ; vio Lopesa ; Robledo de Almeida Torresa ; Marta Fonseca Martinsb ; Darlene dos Santos Daltroc ; Marcos Vinicius Gualberto Barbosa da Silvab
- 关键词：Genetic trend ; Selection differential ; Selection path ; Girolando
- 刊名：Livestock Science
- 出版年：2016
- 出版时间：August 2016
- 年：2016
- 卷：190
- 期：Complete
- 页码：113-122
- 全文大小：716 K
文摘
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Improvements were observed for Girolando herds.
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The greatest annual genetic change estimates for 305-day milk yield were 43.06 and 101.97 milk/yr for sires of bulls and dams of bulls.
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The results of the present study showed that designed genetic program has had a positive impact on milk yield and age at first calving and negative or no impact on first calving interval for 28 years in Girolando cattle.