Testing the chilling- before drought-tolerance hypothesis in Pooideae grasses

This study suggest that Pooideae increased cold tolerance early in their evolution, potentially facilitating faster or more numerous innovations in drought tolerance as species from different tribes expanded into more open and arid habitats. Since then, fine-tuning of both cold and drought tolerance traits has continued, but whether the same traits are targets of selection across taxa is unclear. Identification of Pooideae-wide DEGs shared for cold and drought provides a framework for targeted breeding to multiple stresses.

本研究表明，禾本科类群在进化初期便增强了其抗寒性，这或许促进了物种在向更为开阔和干旱生境扩展过程中，在耐旱性方面的快速或大量创新。自那时起，对冷和耐旱性状的微调持续进行，然而，这些性状是否在各个分类群中均为选择的目标尚不明确。识别出在禾本科类群中广泛存在的、共同针对冷和耐旱性的差异表达基因（DEGs），为针对多种胁迫条件的有目标育种提供了一个框架。