sentence: Jaltomata is closely related to both Solanum ( which includes tomato , potato , and eggplant ) and Capsicum ( peppers ) , and together these three form a clade that is sister to the rest of the Solanaceae , a highly diverse plant family that also contains other economically important genera such as Nicotiana ( tobacco ) and Petunia ( Bohs and Olmstead 1997 ; Olmstead et al. 1999 ; Walsh and Hoot 2001 ; Olmstead et al. 2008 ; S ä rkinen et al. 2013 ) .