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Related Experiment Video

Updated: Feb 25, 2026

Minimally Invasive Embryo Transfer and Embryo Vitrification at the Optimal Embryo Stage in Rabbit Model

Minimally Invasive Embryo Transfer and Embryo Vitrification at the Optimal Embryo Stage in Rabbit Model

Published on: May 16, 2019

Freezability genetics in rabbit semen.

R Lavara¹, E Mocé², M Baselga³

¹Grupo Fisiopatología de la Reproducción, Dpto. PASAPTA, Facultad de Veterinaria, Universidad Cardenal Herrera-CEU, CEU Universities, Spain.

|July 28, 2017

Summary

Semen freezability in rabbits is heritable, with potential for selection. However, growth rate may negatively impact sperm quality, requiring further research for definitive conclusions.

Keywords:

Frozen-semen Genetic-correlation Heritability Rabbit-semen

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Area of Science:

Animal breeding
Reproductive biology
Quantitative genetics

Background:

Semen cryopreservation is crucial for efficient animal reproduction.
Understanding the genetic basis of sperm freezability is essential for improving assisted reproductive technologies.
Rabbit breeding programs aim to enhance both reproductive efficiency and growth performance.

Purpose of the Study:

To estimate the heritability of semen freezability traits in a paternal rabbit line.
To determine the genetic correlation between frozen-thawed sperm quality and daily weight gain.
To explore the implications of these genetic parameters for breeding strategies.

Main Methods:

Estimation of heritability for various frozen-thawed sperm parameters using a paternal rabbit line.
Calculation of genetic correlations between sperm freezability traits and daily weight gain (DG).
Analysis of posterior distributions to assess the reliability of genetic parameter estimates.

Main Results:

Semen freezability traits were found to be heritable, with values ranging from 0.08 to 0.15.
The highest heritability was observed for Live-FT (percentage of viable sperm after freezing), indicating selection potential.
A negative genetic correlation was suggested between daily weight gain and sperm freezability, though with high uncertainty (HPD95%).

Conclusions:

Sperm freezability in rabbits is a heritable trait amenable to genetic selection.
Selection for increased daily weight gain might adversely affect sperm cryosurvival, potentially by altering sperm cell membranes or seminal plasma.
Further research with larger datasets is necessary to accurately estimate genetic correlations and confirm these findings for practical breeding applications.