Malus sieversii modern apple cultivars. Unlike domesticated varieties its leaves go red in autumn: 62.2% of the trees in the wild do this compared to only 2.8% of the regular apple plant or the 2,170 English cultivated varieties. The species is now considered vulnerable to extinction. "Malus sieversii" has previously been identified as the main contributor to the genome of the cultivated apple ("Malus pumila"), on the basis of morphological, molecular, and historical evidence. A DNA analysis in 2010 confirmed "M. sieversii" as the progenitor of the cultivated apple. A third species that has been thought to have made contributions to the
Oxford Scientific Films and factual entertainment shows." Some time later, Oxford Scientific Films became part of the Twofour Group, which was acquired on 24 June 2015 by ITV Studios. Oxford Scientific Films has produced numerous award-winning programmes and films. In 1998, its film "The Forbidden Fruit" produced for the BBC's long-running series "The Natural World" and WNET Nature, won seven industry awards. "Heroes of the High Frontier", produced as a National Geographic Special, won four awards and was a finalist for the Best of the Show Grand Award Trophy at the New York Festivals. In 2005, the company launched "Meerkat Manor", a docu-drama