Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Pedigree Analysis

Pedigree Analysis

Pedigree Analysis

Pedigree Analysis

Incomplete Dominance

Incomplete Dominance

Gregor Mendel's work (1822 - 1884) was primarily focused on pea plants. Through his initial experiments, he determined that every gene in a diploid cell has two variants called alleles inherited from each parent. He suggested that amongst these two alleles, one allele is dominant in character and the other recessive. The combination of alleles determines the phenotype of a gene in an organism.

Monohybrid Crosses

Monohybrid Crosses

Monohybrid Crosses

Monohybrid Crosses

Plant Breeding and Biotechnology

Plant Breeding and Biotechnology

Crop cultivation has a long history in human civilization, with records showing the cultivation of cereal plants beginning at around 8000 BC. This early plant breeding was developed primarily to provide a steady supply of food.

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Reaction norm models for the evaluation of reproductive and productive performance in Nellore cattle.

Tropical animal health and production·2026

Same author

Genomic prediction ability for feed efficiency traits using different models and pseudo-phenotypes under several validation strategies in Nelore cattle.

Animal : an international journal of animal bioscience·2021

Same author

Genome-enabled prediction of meat and carcass traits using Bayesian regression, single-step genomic best linear unbiased prediction and blending methods in Nelore cattle.

Animal : an international journal of animal bioscience·2021

Same author

Genetic analysis of age at first calving, accumulated productivity, stayability and mature weight of Nellore females.

Theriogenology·2017

Same author

Bayesian analyses of genetic parameters for growth traits in Nellore cattle raised on pasture.

Genetics and molecular research : GMR·2017

Same author

Parameter estimates for reproductive and carcass traits in Nelore beef cattle.

Theriogenology·2017

Search research articles

Related Experiment Video

Updated: Jul 7, 2026

Exploring the Longissimus Muscle: Unraveling its Correlation with Meat Quality in Bos indicus and Crossbred Bulls

Exploring the Longissimus Muscle: Unraveling its Correlation with Meat Quality in Bos indicus and Crossbred Bulls

Published on: July 12, 2024

Pedigree analyses in the Breeding Program for Nellore Cattle.

P A Vozzi¹, C R Marcondes, L A F Bezerra

¹Departamento de Genética, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil. pavozzi@genbov.fmrp.usp.br

Genetics and Molecular Research : GMR

|February 15, 2008

Summary

Genetic variability in Nellore cattle breeding programs is low, indicating limited founder representation and potential future inbreeding. Strategies are needed to maintain genetic diversity in bull populations.

More Related Videos

Induction and Evaluation of Inbreeding Crosses Using the Ant, Vollenhovia Emeryi

Induction and Evaluation of Inbreeding Crosses Using the Ant, Vollenhovia Emeryi

Published on: October 5, 2018

Accurate and Phenol Free DNA Sexing of Day 30 Porcine Embryos by PCR

Accurate and Phenol Free DNA Sexing of Day 30 Porcine Embryos by PCR

Published on: February 14, 2016

Related Experiment Videos

Last Updated: Jul 7, 2026

Exploring the Longissimus Muscle: Unraveling its Correlation with Meat Quality in Bos indicus and Crossbred Bulls

Exploring the Longissimus Muscle: Unraveling its Correlation with Meat Quality in Bos indicus and Crossbred Bulls

Published on: July 12, 2024

Induction and Evaluation of Inbreeding Crosses Using the Ant, Vollenhovia Emeryi

Induction and Evaluation of Inbreeding Crosses Using the Ant, Vollenhovia Emeryi

Published on: October 5, 2018

Accurate and Phenol Free DNA Sexing of Day 30 Porcine Embryos by PCR

Accurate and Phenol Free DNA Sexing of Day 30 Porcine Embryos by PCR

Published on: February 14, 2016

Area of Science:

Animal Genetics
Quantitative Genetics
Livestock Breeding

Background:

The Breeding Program for Nellore Cattle (PMGRN) aims to improve genetic merit.
Understanding genetic variability is crucial for sustainable breeding programs.
Previous assessments of genetic parameters in Nellore cattle are limited.

Purpose of the Study:

To evaluate genetic variability in three key reproductive groups within the PMGRN.
To assess founder representativeness, genetic contribution of ancestors, and allele loss.
To identify potential risks of inbreeding in future breeding cycles.

Main Methods:

Utilized parameters based on the probability of gene origin.
Analyzed three reproductive groups: cows, artificial insemination (AI) bulls, and young bulls in progeny testing.
Calculated effective number of founders (Nf), effective number of ancestors (Na), and remaining genomes (Ng).

Main Results:

All three reproductive groups exhibited medium to low genetic variability.
Low founder representativeness and high genetic contribution from specific ancestors were observed.
AI bulls and young sires showed a lack of allelic representativeness compared to farm diversity.

Conclusions:

Current breeding practices may lead to decreased genetic parameters and increased inbreeding probability.
Urgent implementation of strategies to maintain genetic variability in bull populations is recommended.
Selected progeny reproduction could exacerbate genetic issues if not carefully managed.