Evaluation of Some Strains of Long Staple Cotton Hybrids at Different Locations in Egypt in 1993 Season 2. Lint Cotton Yield and Fiber Properties

F. Mustafa, M. Awaad, and S. Abou-Zahra


 
ABSTRACT

Fourty-one strains of cotton descending from 10 Egyptian varietal crosses were included in Preliminary Trial A, and 24 strains descending from 9 crosses were included in Trial B in 1993. Those strains were compared with the standard variety Giza 80. Trial A was raised in Middle Egypt in Sids, whereas Trials B were held at five different locations in Middle and Upper Egypt. The results obtained from Trial A and Trials B showed that only 3 crosses are promising according to lint cotton yield combined with desirable fiber properties. These crosses are: Giza 83 (G. 75 x 5844A), radiated Ashmouni 302 x G. 83 and G. 83 x G. 80. The high heritability value in Trials B in 5 locations indicate that the studied crosses were affected by the environment. The highly significant interaction suggested that more testing for another few years is necessary until a satisfactory genetic stability is achieved. Genetic gains at 5% intensity of selection were 16.14 and 13.97 for lint yield in Trials A and B, respectively. These values were also linked with moderate heritabilities indicating that improvement of lint yield is possible through selection. Genetic coefficient was high for lint yield in Trial A (9.40), while this value was intermediate (7.48) in Trials B over the combined analysis for environments.



Reprinted from 1995 Proceedings Beltwide Cotton Conference pg. 585
©National Cotton Council, Memphis TN

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Document last modified Sunday, Dec 6 1998