Genetically identification of Egyptian onion genotypes for seed yield under heat stress | ||||
| SVU-International Journal of Agricultural Sciences | ||||
| Article 20, Volume 4, Issue 2, April 2022, Page 242-256 PDF (1.9 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/svuijas.2022.144643.1215 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
A.A.H. El-Shaieny   ; A.M.A. Rashwan
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| Horticulture Department, Faculty of Agriculture, South Valley University, 83523 Qena, Egypt. | ||||
| Abstract | ||||
| Constraints are reported for the low productivity and quality of onion seed production in Upper Egypt. Therefore, a field experiment was conducted to study the influence of planting date and genotypes on yield and quality of onion seed production under Upper Egypt conditions where high average day /night-time of temperatures (27.4 ̊C and 11.2 ̊C) for two seasons. The results revealed significant interactions between planting date and genotypes on seed yield/plant in both seasons and the number of umbel/plant in the 2nd season. The highest seed yield (442.25 kg/fed-1) was recorded from Giza 20 planted in Early November sowing. Planted onion bulb set early- November increased seed yield (by 9.6% -17.9 % kg/fed) than grown early December. As a result, Giza 20 cultivar in early November in the current study area and other similar agroecology areas could be suggested to produce a better seed yield of onion. A principal component analysis was performed to interpret the distance between the genotypes. The average inter-cluster distance was found maximum (154.15) between G1 (Sabeeni) and G4 (Giza 20). The differences between the behavior of the seven studied traits in Giza 6 and Giza Red (Group I) are very weak, while for Sabeeni (Group III) and Shandaweel 1 (Group IV), the extent of the differences between the average traits reaches 26.5 % and 29.2% in 1st and 2nd planting dates under the conditions of Upper Egypt, thus considered 2 groups. The inter-seasonal and intra- seasonal fluctuation in both climatic parameters greatly affected the studied onion traits. | ||||
| Keywords | ||||
| Genotypes; Onion sets; PCA; Planting time; Seed yield | ||||
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