Adaptation 2 C4 photosynthesis 2 Journal Article 2 cross-species selection scans gene discovery 2 grasses 2 Comment 1 mehr ... Comparative Study 1 Research Support, Non-U.S. Gov't 1 Research Support, U.S. Gov't, Non-P.H.S. 1 evolution 1 genomics 1 parallel evolution 1 parallel evolution. 1 positive selection 1 proteins. 1 weniger ...