Genotypic Stability of Egyptian Cotton Strains for Lint Yield and Yield Components

S. A. El-Shaarawy; I. Haikal; M. R. A. Rahoumah; A. Zena And A. El-Nazer


High productivity and stability of performance over environments are two features desired in cotton cultivars. We studied genotype-environment interaction (GE) and genotypic stability parameters for 30 genotypes. The genotypes were evaluated over seven locations in 1992. Seven traits, including lint yield and yield components were studied. The variance for genotypes was significant for all traits. The GE mean square was highly significant for all traits except seed index. Tai's (9) method for genotypic stability was used. The genotypes varied for the estimated (i) while the estimated (i) did not differ from = 0. The method was effective in identifying genotypes with high and stable yield and yield components. The best two strains were F(5) 514/90 and F(6)557/90 which were stable for lint yield and yield components. Three strains (F(5) 475/90, F(6) 601/90 and F(10) 383/88) were stable for lint yield and most of yield components and highly productive, producing more than 1000 lbs of lint/acre. This method should be useful in cotton breeding programs and in regional and national cultivar testing to identify high yielding and stable genotypes.

Reprinted from Proceedings of the 1994 Beltwide Cotton Conferences pp. 679 - 682
©National Cotton Council, Memphis TN

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Document last modified Sunday, Dec 6 1998