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Trihybrid Crosses

Trihybrid Crosses

Trihybrid Crosses
Some of Mendel’s crosses examined three pairs of contrasting characteristics. Such a cross is called a trihybrid cross. A trihybrid cross is a combination of three individual monohybrid crosses. For example, plant height (tall vs. short), seed shape (round vs. wrinkled), and seed color (yellow vs. green).
The F1 generation plants of a trihybrid cross are heterozygous for all three traits and produce eight gametes. Upon self-fertilization, these gametes have an equal...

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Updated: Sep 12, 2025

A Simple Protocol for Mapping the Plant Root System Architecture Traits

A Simple Protocol for Mapping the Plant Root System Architecture Traits

Published on: February 10, 2023

Haplotype-based insights into seminal root angle in barley.

Zachary Aldiss¹, Yasmine Lam¹, Silvina Baraibar²

¹Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Brisbane, Queensland, Australia.

The Plant Genome

|August 8, 2025

Summary

Understanding barley

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Last Updated: Sep 12, 2025

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Measuring Gene Expression in Bombarded Barley Aleurone Layers with Increased Throughput

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Lateral Root Inducible System in Arabidopsis and Maize

Lateral Root Inducible System in Arabidopsis and Maize

Published on: January 14, 2016

Area of Science:

Plant genetics
Crop science
Agronomy

Background:

Root system architecture (RSA) is vital for crop adaptation and yield stability.
The genetic basis of RSA in barley (Hordeum vulgum L.) is not well understood.
Climate change necessitates improved RSA for crop resilience.

Purpose of the Study:

To investigate the genetic underpinnings of seminal root angle (SRA) in barley.
To analyze natural variation for SRA in a diverse global collection of barley accessions.
To identify genomic regions controlling SRA.

Main Methods:

Haplotype-based mapping of 816 barley accessions.
Analysis of natural variation in seminal root angle.
Simulation approach to assess breeding potential for narrow SRA.

Main Results:

Identified two novel genomic regions on chromosome 5H and confirmed a known region (RAQ1) on chromosome 3H associated with SRA.
Revealed significant genetic diversity for SRA across diverse geographic origins.
Demonstrated the quantitative, polygenic nature of SRA, posing challenges for traditional breeding.

Conclusions:

Barley exhibits substantial genetic diversity for SRA, with complex inheritance patterns.
Traditional breeding may face limitations in significantly altering SRA.
Genomic selection and gene editing are recommended for efficient RSA improvement in barley.