Comparison of three selection procedures in early generations for improving of some economic characters and earliness in cotton [electronic resource].

Includes reference.

The goal of this investigation was to estimate the efficiency of three selecllon procedures which were pedigree selection method (PD), single seed descent method (SSD) and bulk population selection method (BP) in order to compare the efficiency of these methods for improvement of cotton characters These selection procedures were compared in one cross of cotton namely Giza 70 x TNB₁. This study was designed to research the great two cycles of selection for increasing and maintaining lint cotton yield as well as fiber quality in the cross of cotton. Giza 70 x TNB₁, were completed using different selection procedures in each cycle. The present study was carried out at Sakha Agnculture Research Station. Kafr ELSheikh Governorate in 2006, 2007 and 2008 seasons to study many economic characters and earliness in cotton Thirty plants were selected from F₂, generation of the cross, Giza 70 x TNB₁ based on the mean performance of the F₂, generation proved to be superior plants since mean values of thirty plants selected from F₂ generation by density selection 10% of supenor plants were selected. Summary of the results were achieved as follows: The mean squares showed that differences between families denved by pedigree selection method (PD) were highly Significant for all the studied characters. Mean of characters by the pedigree selection method (PD) were higher and the best than the other two selection procedures for fiber propertIes such as fiber staple length (F.L ), fiber strength (F.S.) and fiber fineness (F.F.).

Summary in Arabic.

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