Age at puberty in southern Australian beef heifers – a heritable trait to improve herd fertility

Abstract

Key findings •• This reports on a pilot study using ultrasound imaging of ovarian function to monitor puberty in beef heifers by tracking the progressive development towards first ovulation in relation to the heifer’s age. •• Age at puberty (AaP) varied widely between the herds studied, and trends were consistent with maturity type. •• The methodology was found practical for future data collection from industry herds to estimate genetic parameters relevant to reproduction. •• Further studies will allow the calculation of heritabilities and the generation of estimated breeding values (EBVs), as well as correlations with other production traits. •• The aim is to enhance selection and management strategies to improve herd fertility, thereby increasing production and profitability.