death_date death_place birth_place birth_date image article_title name
july 28 , 1941 firing ussr range `` kommunarka '' , moscow oblast , velsk , vologda governorate , russian empire april 21 -lrb- may 3 -rrb- , 1899 karpechenko , georgy dmitriyevich.jpg georgii karpechenko
 georgii dmitrievich karpechenko
georgii karpechenko

georgii dmitrievich karpechenko -lrb- 1899 , velsk , vologda governorate -- july 28 , 1941 -rrb- was a russian and soviet biologist .
his name has sometimes been transliterated as karpetschenko .
g. d. karpechenko specialized in plant cytology and created several hybrids .
among his contributions is his seminal work on allopolyploids , culminating in his creation of a fertile offspring of radishes and cabbages , the first instance of a new species obtained through polyploid speciation during experimental crossbreeding .
he worked at the institute of applied botany near leningrad , but collaborated with geneticists in other countries , notably Øjvind winge in denmark and erwin baur in germany .
he also travelled abroad to the john innes horticultural institution in london .
he was arrested by the nkvd under the false grounds of belonging to an alleged `` anti-soviet group '' centered on the well known russian botanist nikolai vavilov who was his colleague at leningrad .
he was sentenced to death and executed on july 28 , 1941 .
