THE EFFECT OF STORAGE AND RADIATION ON COTTON SEED FOR SOME YIELD COMPONENTS
Mar 10, 2017

Agronomy & physiology WCRC Agro-phyisio-Med-MiddleEast WCRC1
Abstract                                                                         Back to Table of contents

This research was set to study the effect of gamma irradiation (20 Kr.) on variability, heritability and the genetic advance upon selection for some economic traits and yield components. Dried seeds of three Egyptian cotton cultivars were used from Gossypium barbadense (Giza 77, Giza 80 and Giza 81). Results showed that gamma irradiation significantly increased means for the position of the first fruiting node, for the stored irradiated seeds and M2 recurrent generation in all cultivars under study, for M1 and M2 generation in Giza 77, and for M1 generation in Giza 81. There was no effect of the means for the number of bolls per plant, except the M2R generation which showed a significant decrease in Giza 81. Irradiation significantly increased mean boll weight for M2 generation in Giza 77 only. It significantly increased means of seed cotton yield per plant for the stored irradiated seeds and M2 generation of Giza 77 only. Using gamma rays significantly decreased means of lint percentage for M1 in Giza 77 and Giza 80 and M2R in Giza 81.

Heritability estimates in broad sense and the expected genetic advance upon selection were greater of all treatments for position of the first fruiting node in the three cultivars under study. These estimates were high for number of bolls per plant of the stored irradiated seeds and M1 generation in Giza 80. Boll weight was considered to be of intermediate heritability for Giza 77 and Giza 80 for all treatments, while response to selection were high values for this trait. The values obtained for all treatments indicated a high degree of heritability and response to selection for seed cotton yield per plant in Giza 77. The results showed a high degree of heritability and response to selection for lint percentage especially the stored irradiated seeds and M1 generation in Giza 80 and Giza 81.

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