GENOTYPIC AND ENVIRONMENTAL EFFECTS IN SEVEN COWPEA (Vigna unguiculata (L.) WALP) GENOTYPES UNDER NATURAL INFESTATION BY Etieffa zin kenelfa TREITSCKE AT lWO LOCATIONS IN SOUTHERN EGYPT | ||||
| Journal of Plant Production | ||||
| Article 11, Volume 28, Issue 3, March 2003, Page 1927-1936 PDF (713.08 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2003.242491 | ||||
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| Authors | ||||
| G. A. Zayed,1; A. M. Mohamed2 | ||||
| 1Hcrtlcultura Res. Institute | ||||
| 2Plant Protection Res. Institute, Agric. Res. Center, Egypt. | ||||
| Abstract | ||||
| Seven cowpea genotypes (cultlvars and lines) were screened (0 tolerance to Etiel/a zinckene/la attack at two different locations over two years. It i~ clear that the variety effecls were significant for all the studied traits. "Kobrosy' e«. produced Ihe highest values or yield and yield components and it could be recommended as a commercial variety under the studied conditions. '1T85D-3850-2' line gave the highest ability to pest tolerance, so, it could be used as a source of pest re istance In a breeding programmes. Generally. the damaged seeds percentage was higher in Kena than Sohag region OVer both years of study under the lield conditions (without any pesticides). however, no significant differences were existed betwaen locations in this respect. On the other hand. the infested pods percentage was higher in Sohag Ihan Kena region over the combined data but differential varietal response were observed from individual environment to another one across fa r studied environments. High heritability values were obtained in all studied characters - except- pod length character. The phenotypic and genotypic coefficient of variability show the obtained results. | ||||
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