Fig. 6From: Whole-genome and dispersed duplication, including transposed duplication, jointly advance the evolution of TLP genes in seven representative Poaceae lineagesOrthologous network and selection pressure analysis of TLP genes in seven grass species. A Quantitative distribution of tubby-like protein (TLP) orthologous gene pairs in seven grass species. Nodes in different colours represent different grass species. B Maximum likelihood gene tree and selection pressure of single-copy genes clustered by the Markov cluster (MCL) algorithm. A nonsynonymous substitution rate (ka)/synonymous substitution rate (ks) (ka/ks) less than 1 indicates purifying selection, and a ka/ks greater than 1 indicates positive selection. The range for all values of ka/ks less than 1 is 0.0001 to 0.399558, and values of ka/ks greater than 1 are highlighted in redBack to article page