From Scientific American:
It only took 141 years, but researchers report they have finally pinpointed one of the genes that Austrian monk Gregor Mendel manipulated in his pioneering experiments that established the basic laws of genetics–specifically, the gene that controlled the color of his peas’ seeds. A team identified the sequence of a gene common to several plant species, which use it to break down a green pigment molecule, and found that it matches Mendel’s gene.
This marks the third of the monk’s seven genes that researchers have precisely identified, and the first since the late 1990s, before the genome sequencing boom.
More here.