El-Borhamy,, H. (2005). ESTIMATiON OF HETEROSIS AND COMBINING ABILITY IN SOME BREAD vIHEAT CROSSES (T. aestivum L.). Journal of Plant Production, 30(2), 755-762. doi: 10.21608/jpp.2005.237124
H. S.A. El-Borhamy,. "ESTIMATiON OF HETEROSIS AND COMBINING ABILITY IN SOME BREAD vIHEAT CROSSES (T. aestivum L.)". Journal of Plant Production, 30, 2, 2005, 755-762. doi: 10.21608/jpp.2005.237124
El-Borhamy,, H. (2005). 'ESTIMATiON OF HETEROSIS AND COMBINING ABILITY IN SOME BREAD vIHEAT CROSSES (T. aestivum L.)', Journal of Plant Production, 30(2), pp. 755-762. doi: 10.21608/jpp.2005.237124
El-Borhamy,, H. ESTIMATiON OF HETEROSIS AND COMBINING ABILITY IN SOME BREAD vIHEAT CROSSES (T. aestivum L.). Journal of Plant Production, 2005; 30(2): 755-762. doi: 10.21608/jpp.2005.237124
ESTIMATiON OF HETEROSIS AND COMBINING ABILITY IN SOME BREAD vIHEAT CROSSES (T. aestivum L.)
National Wheat Research Program, Field crops Research Institute, ARC
Abstract
Six wheat genotypes of diverse origin were crossed in half diallel combinations in 200212003m 2003/2004 season1 the 15 F crosses and their six parents were grown ¡n a field experiment at Sakha Agricultural Research station, Agricultural Research center, Egypt, in a randomized complete block design with four replications. The experiments aimed to study heterosis and combining abUity for heading date, maiurity date, plant height, no. of spikes/plant, no. of grains/spike, 100- kernel weight, spike weight, grain yield/plant, flag leaf area and ciorofel Atb.content the results are summarized as follows. 1- Highly significant differences for most traits were obtained among the studied genotypes (parents and crosses). General and specific combining ability mean squares were highly significant for ail studied traits 2- The best general combiners for grain yield and one or more of its attributes were line2 and sids while the best general combiners for earliness were line I , line2and line 3. 3Positive heterosis effects relative to the mid-parent were found for most of the tr&ts in the crosses 3x4, 2x5 and 1x3. 4- The gca/sca ratio revealed the importance of Non-additive genetic variance in the inheritance of all traits, except heading date and no. of grains/spike. 5- The results of specific combining ability effects, revealed that the cross line 1 x line 4 was the top performing ¡n maturity date, plant height and grain yield! plant.
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