Use of productive data to predict length of productive life in Iranian Holstein cattle

Autor:	M. Moradi Shahrebabak, S. R. M. Ashtiani, A. Abdolmohammadi
Rok vydání:	2005
Předmět:	Holstein Cattle Index (economics) media_common.quotation_subject Longevity food and beverages General Medicine Biology Heritability medicine.anatomical_structure Animal science Lactation medicine Production (economics) Direct evaluation Selection (genetic algorithm) media_common
Zdroj:	Proceedings of the British Society of Animal Science. 2005:126-126
ISSN:	1752-7570 1752-7562
DOI:	10.1017/s1752756200010371
Popis:	Improvement of longevity by direct selection of sires based on theirs daughters’ longevity measures is impractical because of a low heritability and generation intervals prolonged by waiting until all cows complete their productive life. As an alternative to direct evaluation of sires for longevity is indirect prediction from genetically correlated production traits measures in the first lactation. The objectives this study were 1) to estimate genetic parameters of longevity and production traits 2) to examine relationships between longevity and first lactation milk production traits and 3) to determine selection index for sires’ longevity based on production traits.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3ef2df1a26fcf812c9c97cb1910490bb https://doi.org/10.1017/s1752756200010371 Zobrazit plný text záznamu