Hamada,, A., Mohamed, N., Ashmawy, F. (2002). DIALLEL AND CLUSTER ANALYSIS FOR SOME QUANTITATIVE CHARACTERS IN BREAD WHEAT ( Triticum aestivum L.). Journal of Plant Production, 27(9), 5719-5734. doi: 10.21608/jpp.2002.256592
A. A. Hamada,; N. A. Mohamed; F. Ashmawy. "DIALLEL AND CLUSTER ANALYSIS FOR SOME QUANTITATIVE CHARACTERS IN BREAD WHEAT ( Triticum aestivum L.)". Journal of Plant Production, 27, 9, 2002, 5719-5734. doi: 10.21608/jpp.2002.256592
Hamada,, A., Mohamed, N., Ashmawy, F. (2002). 'DIALLEL AND CLUSTER ANALYSIS FOR SOME QUANTITATIVE CHARACTERS IN BREAD WHEAT ( Triticum aestivum L.)', Journal of Plant Production, 27(9), pp. 5719-5734. doi: 10.21608/jpp.2002.256592
Hamada,, A., Mohamed, N., Ashmawy, F. DIALLEL AND CLUSTER ANALYSIS FOR SOME QUANTITATIVE CHARACTERS IN BREAD WHEAT ( Triticum aestivum L.). Journal of Plant Production, 2002; 27(9): 5719-5734. doi: 10.21608/jpp.2002.256592
DIALLEL AND CLUSTER ANALYSIS FOR SOME QUANTITATIVE CHARACTERS IN BREAD WHEAT ( Triticum aestivum L.)
1National Wheat Res. Prog., Field Crops Res.lnst.t ARC, Egypt
2Cent. Lab. For Design and Stat. An.!. Res., ARC, Egypt.
Abstract
The present study was carried out at Gemmeiza Agricultural Research Station during 200012001 and 200112002 seasons. Diallel cross excluding reciprocats among nine parents of wheat namely: Peg"s"/I HD22061 Hork's· (P1). CeTIIA (P2). KVZ I BJ'rs" (P3). Sakha 61 (P4). Giza 168 (P5). Sids 6 (PS), CAR 422 f ANA II URES (P7). Gemmeiza 5 (pa) and Gemmelza 3 (P9) were used to estimate hybrid vigour. general and specific combining ability. phenotypic and genotypic correlation coefficients and cluster analysis for yield and its variables viz.: plant height. spike length. number of spikeletslspike. number of spikes/plant. 1000 -kernel weight. grain weight/spike. number of grains/spike and grain yield/plant. Highly significant differences among genotypes, parents and crosses were recorded for an studied traits. GCNSCA ratio exceeded the unity in all traits except grain weighVspike and grain yield/plant. Thls indicated the importance of additive and addItive X additive genetic effects controlling the majority of the studied traits. While the non-additive gene effects had the highly importance for grain weighVspike and grain yield/pi ant. The estimates of heterosis for grain yield/plant indicated that thirty crosses out of 36 F1 hybrid$ significanUy surpassed their better parent wilh percentage ranged from 6.94 % for P4 X P6 to 98.84 % for PS X P8. These relatively high heterotic percentages along with the variability existed among all diallel set Increase the chance of good recombinations that can be isolated in the following generations particularly. when selfing In the follOwing generations gives an essentially homozygous stale and enhances the role of selected plants in reducing the masking effect of dominance. Results revealed that P1. P7 and P9 were the best combiners for yielding ability and three or four ot its attrbutes. also two crosses P1 x P5 and P1 x P9 were the best specific combining ability effects for grain yieldJplant and its attributes. All correlation coefficients between grain yleld/ptant and its components were significant with positive expression except spike length.
Clusters were formed by sequentially dividing groups of genotypes using un-weighted pair grouped method using arithmetic average (UPGMA). Clusler analysis produced four main groups. These groups are split into many subgroups based on similarity and diSSimilarity of genotypes. The results Indicated that genotypes 1 (P1). 5 (P1 X P5). 7 (P1 X P7). 18 (P3). 20 (P3 X P5). 28 (P4 X P7). 30 (P4 X P9). 32 (P5 X P6). 38 (P6 X P8) and 42 (P7 X P9) have a high distance level between each other and will produce good newly genetic combination if they are used in a crossing ptogram.
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