A framework for improving wheat spike development and yield based on the master regulatory TOR and SnRK gene systems

Area of Science:

• Agricultural Science
• Plant Biology
• Genetics

Background:

• Low yield gain in wheat breeding programs threatens global food security.
• Deficiencies in spikelet and grain production are linked to developmental sensitivities and stress during wheat growth.
• A lack of mechanistic frameworks hinders effective breeding strategies.

Purpose of the Study:

• To introduce a mechanistic framework for understanding wheat yield limitations.
• To identify key molecular regulators controlling plant growth and stress response.
• To provide genetic targets for enhancing wheat yield.

Main Methods:

• Focus on the role of master regulator complexes, including target of rapamycin (TOR) and sucrose non-fermenting-1 (SNF1)-related protein kinases.
• Investigate the regulatory influence of molecules like trehalose-6-phosphate.
• Describe potential genetic targets and experimental approaches for wheat improvement.

Main Results:

• The proposed framework centers on TOR and SNF1-related kinase complexes as key regulators.
• Trehalose-6-phosphate and other molecules modulate these complexes.
• These master regulators balance growth and stress inhibition, offering targets for yield enhancement.

Conclusions:

• The TOR and SNF1-related kinase pathways provide a mechanistic basis for addressing wheat yield stagnation.
• Targeting these pathways offers a promising strategy for genetic breakthroughs in wheat breeding.
• Understanding these molecular mechanisms is crucial for future agricultural productivity.