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Egyptian Journal of Agricultural Research
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Volume Volume 74 (1996)
YOUSSEF, G., MAMOUD, S., TAMMAM, A., EL-HARIRY, M., MARZOUK, I., MOSUAD, M. (1997). SCREENING FOR RESISTANCE TO SCHIZAPHIS GRAMINUM (ROND.) AND RHOPALOSIPHUM PADI (L.) IN CEREAL CROPS.. Egyptian Journal of Agricultural Research, 75(3), 587-599. doi: 10.21608/ejar.1997.410299
GALAL S. YOUSSEF; SALAH K. MAMOUD; AHAMED TAMMAM; MAGDY A. EL-HARIRY; IBRAHIM MARZOUK; MOSA G. MOSUAD. "SCREENING FOR RESISTANCE TO SCHIZAPHIS GRAMINUM (ROND.) AND RHOPALOSIPHUM PADI (L.) IN CEREAL CROPS.". Egyptian Journal of Agricultural Research, 75, 3, 1997, 587-599. doi: 10.21608/ejar.1997.410299
YOUSSEF, G., MAMOUD, S., TAMMAM, A., EL-HARIRY, M., MARZOUK, I., MOSUAD, M. (1997). 'SCREENING FOR RESISTANCE TO SCHIZAPHIS GRAMINUM (ROND.) AND RHOPALOSIPHUM PADI (L.) IN CEREAL CROPS.', Egyptian Journal of Agricultural Research, 75(3), pp. 587-599. doi: 10.21608/ejar.1997.410299
YOUSSEF, G., MAMOUD, S., TAMMAM, A., EL-HARIRY, M., MARZOUK, I., MOSUAD, M. SCREENING FOR RESISTANCE TO SCHIZAPHIS GRAMINUM (ROND.) AND RHOPALOSIPHUM PADI (L.) IN CEREAL CROPS.. Egyptian Journal of Agricultural Research, 1997; 75(3): 587-599. doi: 10.21608/ejar.1997.410299

SCREENING FOR RESISTANCE TO SCHIZAPHIS GRAMINUM (ROND.) AND RHOPALOSIPHUM PADI (L.) IN CEREAL CROPS.

Article 7, Volume 75, Issue 3, September 1997, Page 587-599  XML PDF (3.59 MB)
Document Type: Original Article
DOI: 10.21608/ejar.1997.410299
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Authors
GALAL S. YOUSSEF1; SALAH K. MAMOUD1; AHAMED TAMMAM1; MAGDY A. EL-HARIRY2; IBRAHIM MARZOUK2; MOSA G. MOSUAD1
1Field Crops Research Institute, Agricultural Research Centre, Giza, Egypt
2Plant Protection Research Institute, Agricultural Research Centre, Giza, Egypt
Abstract
Resistance to S.graminum and R.padi is scarce in durum and hex­aploid wheat and only found in wheat-rye translocation lines and some related wild species, i.e. Aegillopes species. Four screening methods for resistance and for tolerance to aphids S.graminum and R.padi in cereals are described in this and previous papers (Youssef et al., 1994). Field and greenhouse tests were conducted at Shandaweel Research Station, known to be an aphid hot spot, and at the greenhouse at Giza, ARC as well. In field screening at Shandaweel, 22 wheat lines were grown in two large yield trials (Twelve rows, 3 reps.) and screened for resistance to aphids since 1990 through 1995. Two wheat lines developing in our program proved to be resistant though with a little increase in bight, and five lines No. 3,5 and 7 (exp. 1) and 4,9 (exp. 2) were unique in combin­ing tolerance to R.padi with high yield and medium height and could be released as new lines. 52 wheat lines were grown in two small yield trials (6 rows, 3 reps.) and screened for resistance to S.graminum/ R.padi since 1992 and through 1995. 7 lines proved to be semi-resistant and 6 lines were tolerant. 130 lines also were grown in 6 rows and 3 reps. Since 1992 through 1995, 26 lines proved to be fairly resistant and 30 lines were tolerant. 3-4 cycles of selfing and selection were sufficient to combine re­sistance with medium height and high grain yield. 420 lines grown in one row (3.5 m) were screened also for aphid resistance. 70 lines exhibited high level of resistance. However, the lat­ter two sets will be confirmed by another test. A green house study was conducted in 1995/1996 season to identify possible sources for resis­tance to S.graminum/ R.padi. Out of 1042 wheat lines from completely new crosses, 15 lines proved to be resistant at the seedling stage and 12 were tolerant.
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