User:Runab WMF/cr-test-page
The orange (specifically, the sweet orange) is the fruit of the citrus species Citrus × sinensis in the family Rutaceae.[1]
The fruit of the Citrus × sinensis is considered a sweet orange, whereas the fruit of the Citrus × aurantium is considered a bitter orange. The sweet orange reproduces asexually (apomixis through nucellar embryony); varieties of sweet orange arise through mutations.[2]
The orange is a hybrid, between pomelo (Citrus maxima) and mandarin (Citrus reticulata). It has genes that are ~25% pomelo and ~75% mandarin;[2][3] however, it is not a simple backcrossed BC1 hybrid, but hybridized over multiple generations.[4] The chloroplast genes, and therefore the maternal line, seem to be pomelo.[2] The sweet orange has had its full genome sequenced.[2] Earlier estimates of the percentage of pomelo genes varying from ~50% to 6% have been reported.[3]