Four experiments were carried out during 2000/2001 and 2001/2002
seasons 10 study the suitable horticultural procedures for three local polyembryony
mango cultivars (Hindy Sinnara, While Sukkary and Zebda) were tested for
compatible grafts with scions of Fagri Kalan,Ewais and Alphonso mango cultivars.
The results revealed that earlier elimination of sex embryos just after germination
enhanced production of nucellar seedlings. Husked seeds gave the highest number of
germinated embryos per seed and fast germination followed by cracked seed coal
treatment Also,Zebda seeds had the highest number of vegetative embryos and more
vigorous seedlings followed by White Sukkary then Hindy Sinnara. White Sukkary and
Zebda seedlings were more tolerant to frequency of irrigation intervals than Hindy
Sinnara seedlings. With regard to the percentage of graft success and scion growth
criteria,it is beUer to graft Ewais and Fagri Kalan on Zebda seedlinqs.whtle Alphonso
scion on White Sukkary is recommended. Histological study at the graft union zone of
incompatible grafts(Ewais on Hindy Sinnara and Alphonso on Zebda) revealed
presence of necrotic layer on both sides of union zone.scattered callus and numerous
free of callus positions that lead to weak or fail connection between two graft
parteners. Meanwhile,lighl microscopic examination at the grafting zone of analogous
compatible grafts Ewais and Alphonso on White Sukkary revealed a condensed and
uniformly callus tissue,smallest necrotic spots and initiation of new vascular elements,
hence scion continued survival and had good growth.