Effect of some Growth Regulators on flower Sex Expression and Yield of Nab Al-Jaml and Jelawi Pomegranate Cultivars

	Effect of some Growth Regulators on flower Sex Expression and Yield of Nab Al-Jaml and Jelawi Pomegranate Cultivars
Journal of Tikrit University For Agriculture Sciences
Article 1, Volume 9, Issue 1, 2009, Pages 168-175
Abstract
The present study was conducted in pomegranate (Punica granatum L.) of the privet orchard in Dyalla Governorate. Two varieties, Nab Al-Jaml and Jelawi, were treated with Gibberellic Acid (GA3), Malic hydrazide (MH), and Ethrel, to explore their Effects on sex expression and Yield quantity properties for two successive seasons (2004-2005 and 2005-2006). Twenty-one Trees of 15 years old planted at (5x5m) were selected from each variety. Seven treatments with 3 replications for each were applied, and each tree was considered as an experimental unit in a factorial experiment with Randomized Complete Block Design (RCBD). Treatments were applied in two dates: (15/7/2004, 10/7/2005) and at the beginning of flowering (10/4/2005, 1/4/2006). Nab Al-Jaml variety had higher percentage of hermaphrodite flowers, the percentages of fruit set, fruit weight and lower percentage of crack fruits as compared to Jelawi variety. Treatment with growth regulators resulted in significant increases in the percentages of fruit set and fruit weight as well as significant decrease in the percentage of cracked fruits, especially after treatment with 100 mg/L of GA3 the interaction between each variety and the treatments showed significant effects on the features studied.

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