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INFLUENCE OF MICROCUTTING SIZES AND IBA CONCENTRATIONS ON IN VITRO ROOTING OF OLIVE cv. ‘DOLCE AGOGIA’

INAM UL HAQ, TOUQEER AHMAD, ISHFAQ AHMED HAFIZ AND NADEEM AKHTAR ABBASI^*

Abstract: Different microcutting sizes and various levels of IBA @ 0, 0.25, 0.5, 0.75, 1.0, 1.25, 1.50, 1.75 and 2.0 mg l^-1 were investigated for their effect on In vitro rooting of olive cv. ‘Dolce Agogia’ using modified olive medium. Among the various sizes of microcuttings, tetranodal was the most suitable with highest rooting percentage (55.85%), number of roots (3.48), root length (1.76 cm) and survival percentage (45.33). The interaction of tetranodal microcuttings was much influenced with 1.25 mg l^-1IBA as it resulted in a promising outcome of 95 .33% rooting, 5.61 roots per microcutting, 3.40 cm root length and survival percentage of 90.33%. IBA @ 1.25 mg l^-1 (T₆) was superior to other treatments with fairly alluring response towards rooting. An ascending trend was observed in rooting with increasing IBA concentration up to 1.25 mg l^-1and in the same way, increase in the microcutting size was positively correlated with most favorable root development. Tetranodal microcuttings gave the best performance for ex vitro survival in comparison to uninodal, bi nodal and tri nodal microcuttings.

Department of Horticulture, Pir Mehr Ali Shah Arid Agriculture University Rawalpindi, Pakistan.
^*Corresponding author E-mail: nadeemabbasi65@yahoo.com