NDLI: Inbreeding on productive and reproductive traits of dairy Gyr cattle

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Inbreeding on productive and reproductive traits of dairy Gyr cattle

Content Provider	Semantic Scholar
Author	Filho, J. R. Verneque, Rui Da Silva Torres, Robledo De Almeida Sávio, Paulo Lopes Raidan, Fernanda Santos Silva Toral, Fabio Luiz Buranelo
Copyright Year	2015
Abstract	The objective of this study was to estimate genetic parameters and to evaluate the effects of inbreeding on productive and reproductive traits of dairy Gyr cattle. Single-trait animal models were used to estimate genetic parameters and solutions for inbreeding coefficients for milk (milk 305-d), fat (fat 305-d), protein (protein 305-d), lactose (lactose 305-d), and total solids (TS 305-d) yield up to 305 days of lactation, days in milk (DIM), age at first calving (AFC) and calving intervals (CI). The mean inbreeding coefficient was 2.82%. The models with linear and quadratic effects of inbreeding coefficients fitted the data better than the models without or with only linear effect of inbreeding coefficient for all traits. The increase in inbreeding coefficient caused several losses in productive and reproductive traits of dairy Gyr cattle. Estimates of heritability for milk 305-d, fat 305-d, protein 305-d, lactose 305-d, TS 305-d, DIM, AFC, and CI were 0.28, 0.27, 0.22, 0.21, 0.22, 0.17, 0.20, and 0.10, respectively. It is possible to achieve genetic progress in productive traits (especially in milk 305-d and fat 305-d) and age at first calving in dairy Gyr cattle through selection.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://www.scielo.br/pdf/rbz/v44n5/1806-9290-rbz-44-05-00174.pdf
Language	English
Access Restriction	Open
Subject Keyword	Animal Model Automatic frequency control Dairy Products Depressive disorder Dimesna Estimated Fatty acid glycerol esters Inbreeding Lactation Lactose Matthews correlation coefficient Milk (body substance) Platelet Glycoprotein 4, human Reproduction Seizures Trait solid substance
Content Type	Text
Resource Type	Article

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