Inheritance of Powdery Mildew Resistance and Some Economic Traits in Cucumber (Cucumis sativas L.)
S. Khatab, E., E. Gomaa,, S., M. Khalf-Allah, A., I. Abido, A., M. El-Gamal, A., M. Al-Abed, S. (2016). Inheritance of Powdery Mildew Resistance and Some Economic Traits in Cucumber (Cucumis sativas L.). EKB Journal Management System, 37(April-June), 116-126. doi: 10.21608/asejaiqjsae.2016.2213
Enas S. Khatab; Sara E. Gomaa,; Abd El-Aziz M. Khalf-Allah; Aly I. Abido; Ahmad M. El-Gamal; Sawsan M. Al-Abed. "Inheritance of Powdery Mildew Resistance and Some Economic Traits in Cucumber (Cucumis sativas L.)". EKB Journal Management System, 37, April-June, 2016, 116-126. doi: 10.21608/asejaiqjsae.2016.2213
S. Khatab, E., E. Gomaa,, S., M. Khalf-Allah, A., I. Abido, A., M. El-Gamal, A., M. Al-Abed, S. (2016). 'Inheritance of Powdery Mildew Resistance and Some Economic Traits in Cucumber (Cucumis sativas L.)', EKB Journal Management System, 37(April-June), pp. 116-126. doi: 10.21608/asejaiqjsae.2016.2213
S. Khatab, E., E. Gomaa,, S., M. Khalf-Allah, A., I. Abido, A., M. El-Gamal, A., M. Al-Abed, S. Inheritance of Powdery Mildew Resistance and Some Economic Traits in Cucumber (Cucumis sativas L.). EKB Journal Management System, 2016; 37(April-June): 116-126. doi: 10.21608/asejaiqjsae.2016.2213

Inheritance of Powdery Mildew Resistance and Some Economic Traits in Cucumber (Cucumis sativas L.)

Alexandria Science Exchange Journal
Article 3, Volume 37, April-June - Serial Number 2, June 2016, Page 116-126  XML PDF (375.68 K)
Document Type: Original Article
DOI: 10.21608/asejaiqjsae.2016.2213
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Authors
Enas S. Khatab1; Sara E. Gomaa,1; Abd El-Aziz M. Khalf-Allah2; Aly I. Abido3; Ahmad M. El-Gamal3; Sawsan M. Al-Abed4
1Veg., Medicinal and Aromatic Plants Breeding Dept, Horticulture Research Institute (HRI)
2Veg. Dept., Faculty of Agric., El-Shatby, Alex. Univ.
3Plant Production Dept., Faculty of Agric., Saba Basha, Alex. Univ.
4Agriculture Botany Dept., Faculty of Agric., Saba Basha, Alex. Univ.
Abstract
The present study was carried out during successive growing seasons for the years 2014 and 2015, under greenhouse conditions, at Sabahia Horticulture Research Station, Alexandria Governorate, Egypt. Six inbred lines of cucumber were utilized in a half-diallel cross breeding program to obtain 15 F1 hybrids. The breeding program was concerned with powdery mildew resistance, economic characters and their attributes; i.e. total fruit yield/ plant, number of fruits/plant and average fruit weight; in addition to the fruit quality characteristics; i.e., fruit length and fruit diameter. Results showed that the hybrid P2×P4 gave a very high resistance (100%), which is considered an immune (I) hybrid, while, the genotypes P2, P1×P2, P1×P3, P2×P5 gave high powdery mildew resistance (HR); i.e., (98.33%, 98.23%, 96.3% and 95.83%), respectively. The additive gene action exhibited highly significant, positive or negative, values in all the tested crosses for total yield/plant; whereas, the dominance effect values were found to be positively high significant in most crosses. The additive gene action exhibited positive significant values for powdery mildew resistance in most crosses; except the cross P1×P2, which gave a negative high significant values and the two crosses P1×P5 and P2×P3, which gave insignificant values. The dominance gene action was found to have positive high significant values in most crosses for this character.
Keywords
Cucumber; Powdery mildew resistance; Types of gene action
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