Salama, S., Ramadan, R., Awaad, S. (2008). ESTIMATES OF STABILITY PARAMETERS AND PATH ANALYSIS FOR SOME WHEAT GENOTYPES UNDER DIFFERENT ENVIRONMENTS. Journal of Plant Production, 33(10), 7053-7061. doi: 10.21608/jpp.2008.171222
S. M. Salama; R. A. Ramadan; S. S. Awaad. "ESTIMATES OF STABILITY PARAMETERS AND PATH ANALYSIS FOR SOME WHEAT GENOTYPES UNDER DIFFERENT ENVIRONMENTS". Journal of Plant Production, 33, 10, 2008, 7053-7061. doi: 10.21608/jpp.2008.171222
Salama, S., Ramadan, R., Awaad, S. (2008). 'ESTIMATES OF STABILITY PARAMETERS AND PATH ANALYSIS FOR SOME WHEAT GENOTYPES UNDER DIFFERENT ENVIRONMENTS', Journal of Plant Production, 33(10), pp. 7053-7061. doi: 10.21608/jpp.2008.171222
Salama, S., Ramadan, R., Awaad, S. ESTIMATES OF STABILITY PARAMETERS AND PATH ANALYSIS FOR SOME WHEAT GENOTYPES UNDER DIFFERENT ENVIRONMENTS. Journal of Plant Production, 2008; 33(10): 7053-7061. doi: 10.21608/jpp.2008.171222
ESTIMATES OF STABILITY PARAMETERS AND PATH ANALYSIS FOR SOME WHEAT GENOTYPES UNDER DIFFERENT ENVIRONMENTS
1Field Crop Institute; Lab., for Design and Statistcal Analysis. Res., A.R.C. Giza, Egypt
2Field Crop Institute, Wheat Res. Section (A.R.C.) Giza Egypt
Abstract
Ten wheat genotypes (Triticum aestivum L.) were evaluated for yield and attributing characters under four environments(two locations x two seasons .The genotypes were; Sakha 93, Sakha 94, Giza 168, Sids 1, Sids 3, Sids 5, Gemmeiza 3, Gemmeiza 5, Gemmeiza 7 and Gemmeiza 9. The mean performance, phenotypic stability and interrelationship between various characters were computed as well as path coefficient. The results indicated that, significant genotypes; genotype x environment, environmental linear and genotype x environment linear variance for all studied characters. Regression coefficient (b) deviated significantly from unity (b > 1) for genotypes, Sids 1, Sids 3, Sids 5 for all characters aproximately; indicating that the genotypes were adapted to favorable environments.
The “b” value deviated significantly from unity and was less than one (b < 1) in Gemmeiza 7 for flag leaf area, number of spikes / plant, Sakha 93 for flag leaf area, plant height number of spikes/plant, number of spikelets/spike and 1000-grain weight and Giza 168 for number of spikelets / spike, 1000-grain weight and grain yield / plant, genotypes for considering the stability parameters (C.V% and S2d accompanished with mean performance (X), the most desired and stable wheat genotypes were Gemmeiza 9 for all studied characters except number of spikes/plant . While Sakha 94 was stable for number of spikes/plant and grain yield / plant.
Correlation coefficients values were positive and significant between yield and its component for all studied characters except plant height. Path coefficient analysis indicated that number of spikes/plant and 1000-grain weight were the most prominent direct effects on grain yield / plant while number of spikes/plant, number of grains/spike and 1000 grain weight proved to have the highest indirect contribution to grain yield /plant.
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