VARIABILITY IN 19 VARIETAL WHEAT BLENDS AND GENOTYPIC AND PHENOTYPIC CORRELATIONS FOR MORPHOLOGICAL AND YIELD CHARACTERS | ||
| Egyptian Journal of Agricultural Research | ||
| Article 8, Volume 74, Issue 3, September 1996, Pages 685-700 PDF (4.26 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejar.1996.429083 | ||
| Authors | ||
| FAWZY F. SAAD1; ABDEL-SALAM A. GOMAA2; ABDALLA F. IBRAHIM1; AMANY M. SALLAM2 | ||
| 1Department of Agronomy, Faculty of Agriculture, Cairo University, Giza, Egypt | ||
| 2Agricultural Research Center, Ministry of Agriculture, Giza, Egypt | ||
| Abstract | ||
| Cultivar mixtures have been suggested to increase the yielding ability and control crop diseases, but little information is available on how to choose component varieties for cultivar mixtures. A two year-study was directed to test the ability of two and four component wheat mixtures to increase yield and yield components. All of the 19 possible two and four variety mixtures of six Egyptian wheat varieties (Triticum aesetivum L.) and their counterparts were evaluated in the two seasons, 1992-1993 and 1993-1994. The performance of a blend can be evaluated by its yield per unit area and by its compensatory response for yield. Four of the two variety mixtures were superior in seed yield than the highest component of the mixture. The increase in yield above the high component varied from 0.11 ton/acre for the blend Sakha 61 with Giza 157 to 0.90 ton/acre for Sakha 61 with Sakha 69 in the two growing seasons. For each of the yield components, some blends were superior relative to either its higher counterpart or the mean of parents in pure stand. The mixtures with yield advantage comprised genotypes that were more diverse in height and relative maturity. Some of the most important aspects to the wheat breeder are the number of spikelets per spike, weight of kernel and kernels weight per spike, which contribute significantly to grain yield. In most cases, genotypic correlations were higher than phenotypic correlations. | ||
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