A multisite managed environment facility for targeted trait and germplasm phenotyping | JoVE Visualize

Area of Science:

Agricultural Science
Plant Breeding
Environmental Science

Background:

Field evaluation of germplasm for performance under water and heat stress is challenging due to environmental variability and genotype×environment interactions.
Limited capacity of commercial breeding companies to screen for traits and lack of validation in relevant field environments hinder the uptake of proposed traits or genes.
The economic benefit of selecting specific traits and their value in commercially relevant genetic backgrounds are often not demonstrated.

Purpose of the Study:

To overcome the disconnection between physiological trait breeding and adoption by commercial breeding companies.
To establish a system for robust field evaluation of germplasm under precisely managed stress conditions.
To facilitate the delivery of promising germplasm and high-value traits into commercial breeding programs.

Main Methods:

Selection of three field sites representing main Australian wheatbelt environment types to form Managed Environment Facilities (MEFs).
Management of soil moisture stress via irrigation and heat stress via variable sowing dates within MEFs.
Continuous monitoring of weather variables, soil water, and canopy temperature in probe genotypes to guide management and sampling.
Standardization of protocols for core measurements to ensure consistent phenotyping of yield and other traits across sites and seasons.

Main Results:

MEFs enable the assessment of numerous traits across multiple genetic backgrounds in relevant environments.
The relative value of different traits can be determined under controlled stress conditions.
Facilitation of the delivery of promising germplasm and high-value traits into commercial breeding programs.

Conclusions:

Managed Environment Facilities (MEFs) provide a robust platform for evaluating crop germplasm under precisely controlled water and heat stress conditions.
Standardized phenotyping protocols and continuous environmental monitoring within MEFs enhance the reliability and interpretability of genotype×environment interactions.
MEFs bridge the gap between physiological research and commercial breeding by validating traits in relevant environments and genetic backgrounds, thereby accelerating the development of improved crop varieties.