[α/Fe] plotted against iron abundance, [Fe/H]. Turquoise rhombus refers to this work; red triangles show the alpha abundances estimated for NGC 1313-379; red squares display the measurements for NGC 1705-1 (Hernandez et al. 2017); red circles display the measurements for the SSC in NGC 6946 (Larsen et al. 2006); green circles show the abundance of the M 31 GCs from Colucci et al. (2009); red crosses and black Xs present MW disc abundances from Reddy et al. (2003, 2006), respectively; black open circles are the MW disc abundances from Bensby et al. (2005); teal triangles are the abundances of the individual stars in the centre of the Fornax dwarf spheroidal galaxy (Letarte et al. 2010); blue squares and stars belong to LMC bar and inner disc abundances presented by Van der Swaelmen et al. (2013).