Rootstock-Induced Dwarfing and Yield Efficiency in Apricot: Performance of SP-2 (Prunus spinosa) and DO-1,2,3 (Prunus Domestica)


Uğur R., Altun Ö., Özatar H. O., Bulunuz Palaz E., Atagül Ö., Temizyürek F., ...Daha Fazla

International Journal of Agriculture, Environment and Food Sciences, cilt.9, sa.3, ss.682-689, 2025 (Hakemli Dergi)

Özet

Propagation of fruit trees is typically achieved through vegetative methods due to their

long juvenile period. Common vegetative propagation techniques include cuttings,

grafting, and in vitro micropropagation. Grafting involves the union of two distinct plant

parts to form a symbiotic organism. The root system, or rootstock, significantly influences

the growth and yield characteristics of the grafted scion cultivar. Therefore, selecting

appropriate rootstocks is critical in fruit production. Among stone fruits, wild plums

(Prunus spp.) and their hybrids are the most widely used rootstocks, primarily due to their

tolerance to extreme soil conditions and ease of vegetative propagation. Kahramanmaraş

region, located within the natural distribution range of many stone fruit species, has been

the focus of a comprehensive rootstock selection program initiated in 2009. This effort

identified approximately 50 promising wild plum genotypes, which were incorporated

into breeding studies. Among these, SP-2 (P. spinosa), known for its dwarfing effects,

and DO-1, DO-2, and DO-3 (P. domestica), recognized for their high compatibility with

apricots, were examined in detail. This study evaluated the effects of these rootstocks on

tree growth, yield, and fruit quality parameters in table apricot cultivars. The research,

conducted between 2015 and 2021 at the Eastern Mediterranean Transitional Zone

Agricultural Research Institute, revealed that SP-2 exhibited the smallest trunk crosssectional

area (TCSA) at 6.55 cm², indicating a pronounced dwarfing effect. Most

vigorous development was observed in the Myrobolan 29C (7.34 cm) in the study. Fruit

weight ranged from 35.81 g to 40.09 g, with the highest observed in apricots grafted onto

DO-1, comparable to Myrobolan 29C. Other fruit quality parameters showed no

statistically significant differences between the candidate and control rootstocks. In

conclusion, the tested rootstocks exhibited a significant dwarfing effect while maintaining

yield and quality parameters consistent with the literature. These findings will inform

future rootstock breeding programs.