6. BİLSEL INTERNATIONAL SUMELA SCIENTIFIC RESEARCHES CONGRESS, Trabzon, Türkiye, 12 - 13 Nisan 2025, ss.253-259, (Tam Metin Bildiri)
The study investigated the graft success rates of Early Queen and Pioneer plum varieties grafted on selected and control
rootstocks. The graft success rates were determined to be 84.00% for Early Queen and 82.78% for Pioneer, with the
difference between the two varieties being statistically significant at the 5% level. Among the rootstocks, a more
pronounced level of statistical variation was observed in graft success rates (significant at the 1% level), with rates
ranging from 72.00% to 94.66%. The highest graft success rates were recorded for eight rootstocks within the same
statistical group, with KL-38 (94.66%), KL-60 (94.16%), and GN-22 (93.16%) ranking as the top three performers. In
contrast, the lowest graft success rates were identified in eight hybrid rootstocks, with FS-197 (72.00%), FS-185
(72.66%), and KL-4 (73.66%) exhibiting the poorest performance. The average graft success rate across all rootstocks
was 83.39%, reflecting a high overall success rate. The study revealed that rootstock/scion interactions exhibited
statistically significant differences at the 1% level, although the distribution of these differences was not excessively
broad. Graft success rates spanned from 71.66% to 95.66%, indicating generally high levels of success across the
combinations. Twelve rootstock/scion combinations, including control rootstocks, produced successful results within the
same statistical group. The top three combinations with the highest graft success rates were KL-38/Early Queen (95.66%),
KL-60/Early Queen (95.33%), and KL-59/Early Queen (95.00%). Conversely, the lowest graft success rates were
observed in FS-185/Early Queen (71.66%), FS-197/Pioneer (72.00%), and FS-197/Early Queen (72.00%). Overall, the
graft success rates across the 19 rootstock combinations were statistically comparable, with no extreme variations
observed even among the lower-performing combinations. Graft success rates consistently exceeded 70% across the entire
distribution, underscoring the significant impact of rootstock/scion interactions on graft success.