U-Luther Burbank, umcwaningi wezitshalo odumile, wakubiza ngokuthi ukwenza izihlahla ezindala zibe zintsha futhi.
Kodwa nakubantu abasafufusa, ukuxhunyelelwa kwesihlahla sezithelo kulula ngendlela ehehayo: igatsha elithule noma ihlumela - i-scion - ihlotshaniswa esihlahleni sezithelo esihambisanayo, esithule. Uma ngemva kwamasonto ambalwa kuxhunyelelwa, khona-ke phakathi nezinkathi ezimbalwa zonyaka, i-scion iqala ukukhiqiza isithelo esifana nesatshalwa kumzali wayo wokuqala. Ukuze ufunde indaba ephelele, chofoza lapha.
Gaffikin, Brigid. “Ukuxhunyelelwa kwezihlahla zezithelo kungaba lula” San Francisco Chronicle (13 Feb. 2011. 26 Feb. 2011)