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Article

Evidence of the genetic trend for secondary sex ratio in Iranian Holsteins.

Reproduction, fertility, and development - 1 Jan 2012

Ghavi Hossein-Zadeh Navid

Abstract excerpt

Calving records from the Animal Breeding Center of Iran collected from January 2000 to December 2007 and comprising 520964 Holstein calving events from 2135 herds were analysed using animal and sire models to estimate variance components, heritabilities and genetic trends for secondary sex ratio (SSR) in the first, second and third parities. Direct heritabilities for SSR ranged from 0.00004 to 0.001 over the...

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PMID: 22401275
DOI: 10.1071/RD11203

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PubMed metadata and Literature Corpus relationships. Corpus snapshot updated 7 Sept 2026. Manifest publication-graph-cohort-2026-09-08.1.

Source receipt: pubmed, retrieved 7 Sept 2026.

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