DEVELOPING HIGH-YIELDING BARLEY CULTIVARS UNDER DIFFERENT STRESS CONDITIONS IN EGYPT | ||
| Egyptian Journal of Agricultural Research | ||
| Article 16, Volume 76, Issue 3, September 1998, Pages 1037-1062 PDF (5.64 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejar.1998.358475 | ||
| Authors | ||
| FARED A. ASAAD; MAHER M. NOAMAN; ABDEL-FATAH A. EL-SAYED; AHMED O. EL-BAWAB | ||
| Field Crops Research Institute, Agricultural Research Center, Giza, Egypt | ||
| Abstract | ||
| Four groups of yield trials namely; Screening Yield Trial (SYT), Preliminary yield Trial (PYT), Advanced yield trial (AYT), and Demonstration yield trial (DYT) were grown under different stress conditions during the 1995/96 growing season. The SYT experiment was grown in Ismailia (poor sandy soil under sprinkler irrigation) and Mallawy (high temperature and aphid infestation). The second experiment (PYT) was planted in six locations; Nubaria (calcareous soil), Sakha (disease problems), EI-Serw (saline soil), Ismailia, Mallawy, and the New Valley (heat stress). The third experiment (AYT) was planted in five locations; Ismailia, Mallawy, ElMataana, Korn Ombo, and the New Valley. The fourth experiment (DYT) was planted in three locations; Ismailia, Nubaria, and the New Valley. Results showed that in SYT, remarkable variability in grain yield (GY) was observed. This variation ranged from 3308 to 5755 kg/ha. One genotype was superior to the check in both grain yield and biological yield (BY) in addition to straw yield (SY). In pyt, nine genotypes were significantly earlier than the national check ranging from 4 to 9 days earlier at Ismailia, whereas, at the New Valley, the majority of the genotypes were significantly earlier than the check. Two genotypes had relatively high BY, SY and GY. High potentiality of the New Valley area compared to Ismailia was observed. In AYT, six genotypes were significantly earlier than the national check at Ismailia. Regarding GY, only one genotype which had high BY and SY had also high GY with relatively low harvest index (HI) (0.255).. Heading date at the New Valley was much earlier than that of the other two locations with an average of 72 days to heading. The average plant height in the New Valley has also been affected by the temperature and due to the short duration of growth under this condition. On the other hand, By, SY, and GY at the New Valley were higher than the other two locations. | ||
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