GRAS proteins belong to a plant transcription factor family that is involved with multifarious roles in plants. Although previous studies of this protein family have been reported for Arabidopsis, rice, Chinese cabbage and other species, investigation of expansion patterns and evolutionary rate on the basis of comparative genomics in different species remains inadequate. | Nội dung Text Unusual tandem expansion and positive selection in subgroups of the plant GRAS transcription factor superfamily