Genetic parameters for test-day milk yield, lactation persistency, and fertility in low-, medium-, and high-production systems in Kenya.

doi:10.3168/jds.2020-18350

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Article

Genetic parameters for test-day milk yield, lactation persistency, and fertility in low-, medium-, and high-production systems in Kenya.

Journal of dairy science - 1 Nov 2020

Wahinya P K, Jeyaruban M G, Swan A A, Gilmour A R, Magothe T M

Abstract excerpt

Genetic parameters for test-day milk yield, lactation persistency, and age at first calving (as a fertility trait) were estimated for the first 4 lactations in multiple-breed dairy cows in low-, medium-, and high-production systems in Kenya. Data included 223,285 test-day milk yield records from 11,450 cows calving from 1990 to 2015 in 148 herds. A multivariate random regression model was used to estimate...

Topics

Animals
Cattle
Dairying
Female
Fertility
Kenya
Lactation
Milk
Phenotype
Pregnancy

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Open in PubMed

Identifiers

PMID: 32921460
DOI: 10.3168/jds.2020-18350

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