控制大麦种子休眠时间“开关”找到

Core Insights - The research team from the Chinese Academy of Sciences has uncovered the genetic mechanisms behind barley seed dormancy, which is crucial for developing resilient crops and ensuring global food security [1][2] - The study highlights the dual regulatory mechanism of the MKK3 gene, which controls the dormancy period of barley seeds, impacting agricultural practices and crop yields [1] Group 1: Research Findings - Seed dormancy is defined as the biological characteristic where seeds do not germinate despite suitable conditions, which can lead to either premature germination or delayed planting [1] - The MKK3 gene regulates seed dormancy through a combination of gene copy number and kinase activity, where increased gene copies and stronger kinase activity correlate with reduced dormancy [1] Group 2: Global Implications - Analysis of over 1,000 barley seed samples revealed that different regions have selected various MKK3 gene types based on climate and agricultural needs, such as low-activity types in East Asia for resistance to ear germination and weak dormancy types in Northern Europe for brewing quality [2] - The findings provide actionable molecular modules for breeding resilient crops, allowing for fine-tuning of seed dormancy through genetic modifications, which is essential for sustainable agriculture under changing global climate conditions [2]