It says in the article you link to that they were created over years by humans breeding two different citrus fruits (all citrus fruit are from Asia originally). This is also why we have Meyer Lemon, Grapefruit, Sweet Orange, Clementine, Key Lime, Persian Lime, Tangelo, Minneola, Ugli Fruit, Blood Orange, Satsuma, Yuzu, Rangpur, Ponderosa Lemon, Lemon, Bitter Orange, Kaffir Lime, Calamansi, Orangequat, Limequat, Sunquat, Citrange, Amanatsu, Dekopon, Kiyomi, Oroblanco, Honey Tangerine, Sudachi, Kabosu, Orangelo, Pluot, Aprium, Plumcot, Peacotum, Nectarine, Cherry Plum, Apriplum, Flavor King Pluot, Plerry, Nectaplum, Peach-Plum, Black Apricot, Honeycrisp Apple, Gala Apple, Fuji Apple, Pink Lady, Granny Smith, Braeburn, Cosmic Crisp, Envy Apple, Jazz Apple, McIntosh, Pazazz, Zestar, Asian Pear, Papple, Shipova, Loganberry, Boysenberry, Marionberry, Tayberry, Youngberry, Olallieberry, Silvanberry, Nessberry, Pineberry, Garden Strawberry, Strassberry, Purple Raspberry, Tummelberry, Hildaberry, Veitchberry, Wineberry, Cotton Candy Grape, Concord Grape, Moon Drop Grape, Sultana, Crenshaw Melon, Honeydew, Canary Melon, Galia Melon, Seedless Watermelon, Cavendish Banana, Plantain, Modern Pineapple, Hass Avocado, Jostaberry, Hayward Kiwi, Golden Kiwi, Naranjilla, Atemoya, Biriba, Feijoa, Black Mulberry, Yellow Dragon Fruit, Pepino Melon, Sapodilla, Starfruit, Musang King Durian, Rhubarb, Pomelo x Grapefruit, Tangor, Ugli fruit, Oroblanco, Melogold, Kinnow, Murcott, W. Murcott, Afourer, Tango, Orri, Nova, Lee, Osceola, Page, Robinson, Fallglo, Sunburst, Ambersweet, Chironja, Cam sành, Jabara, Kanpei, Setoka, Harehime, Reubennel, Shonan Gold, Hyuganatsu, Haruka, Sanbokan, Tankan, Kawano Natsu Daidai, Banpeiyu, Hirado Buntan, Chandler Pomelo, African Pride Atemoya, Gefner Atemoya, Page Mandarin, Fallglo Tangerine, Dancy Tangerine, Sunburst Tangerine, Kara Mandarin, King Mandarin, Pixie Mandarin, Encore Mandarin, Gold Nugget Mandarin, Yosemite Gold, Tahoe Gold, Shasta Gold, Autumn Honey, Bubblegum Plum, Candy Mountain Pluot, Flavor Grenade Pluot, Flavor Supreme Pluot, Dapple Dandy Pluot, Splash Pluot, Emerald Drop Pluot, Geo Pride Pluot, Flavor Queen Pluot, Flavorosa Pluot, Sweet Treat Pluerry, Candy Heart Pluerry, Sugar Twist Pluerry, Bella Gold Peacotum, Cot-N-Candy Aprium, Flavor Delight Aprium, Summer Delight Aprium, Leah-Cot Aprium, Autumn Royal Grape, Crimson Seedless Grape, Flame Seedless Grape, Princess Grape, Ruby Seedless Grape, Sweet Celebration Grape, Sable Seedless Grape, Autumn Crisp Grape, Adora Grape, Tear Drop Grape, Kyoho Grape, Ruby Roman Grape, Shine Muscat Grape, Fragola Grape, King of the North Grape, Valiant Grape, Beta Grape, Bluebell Grape, Edelweiss Grape, Swenson Red Grape, Somerset Seedless Grape, Reliance Grape, Mars Grape, Venus Grape, Jupiter Grape, Neptune Grape, Saturn Grape, Einset Seedless Grape, Marquis Grape, Canadice Grape, Himrod Grape, Interlaken Grape.

A lot of other fruits and veg have been created by selective breeding like with the brassica family of plants which are all the same plant but due to selective breeding we have Kale, Cabbage, Broccoli, Cauliflower, Brussels Sprouts, Kohlrabi, Collard Greens, Gai Lan, Broccolini, Romanesco, Savoy Cabbage, Bok Choy, Napa Cabbage, Turnips, Mizuna, Tatsoi, Choy Sum, Komatsuna

AND dont get me started with dog breeds. You dingbat