Evaluation studies of some Egyptian okra leaf cotton genotypes for yield, yield components, fiber quality, chemical traits and insect resistance [electronic resource].

Includes references.

Field experiments were conducted during 2003 and 2004 seasons in El-Giza Experimental Station, A.R.C. to evaluate five cotton genotypes, namely Giza 80 okra, Giza 83 okra, Giza 85 okra, Giza 88 okra and (Giza 80 x Giza 83) okra, which descended from discontinuous backcrossing between the Egyptian cotton genotypes, Giza 80, Giza 83, Giza 85, Giza 88, Giza 80 x Giza 83 and the upland okra leaf line MAR GN-8, compared with three Egyptian varieties Giza 80, Giza 83 and Giza 85. The results indicated that insignificant differences were found between all okra genotypes and the recurrent parents for number of bolls/plant, boll weight, seed cotton yield, lint yield and fiber strength. The okra leaf shape tended to significant increase in leaves content of chlorophyll, carotenoids, total aminonitrogen, indoles gossypol and phenols. This increase of some chemicals content such as polyphenols and gossypol was associated with the resistance to insects such as jasside, whitefly and cotton leaf warm. The breeder can use these lines as a good material for insect resistance in cotton breeding program.

Summary in Arabic.

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