الفهرس 
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Abstract
Four local cotton varieties: G. 92, G. 93, G. 94 and G. 96 and three exotic cotton verities: Acala, D.B 27 and D.B 244 were crossed in all possible combinations without reciprocals to produce 21 interspecific crosses during summer 2016.
In 2017 season TheF1 seeds and their parents were sown in randomized blocks design with three replications.
Part I: Half diallel experiments:
Studied traits:
A. Growth traits:
1. Flowering (days) 2. Number of fruit branches/plant 3. Plant height. (c.m)
B. Yield and yield component traits:
1. Seed cotton yield/plant in grams 2. Lint cotton yield/plant in gram
3. Lint percentage 4. Boll weight in grams 5. Number of bolls/plant
C. Fiber properties:
1. Fiber length at 2.5% span length in mm 2. Uniformity ratio
3. Fiber strength 2. Fiber fineness in Micronaire reading
The results of mean performance and heterosis coupled with specific combining ability effects in TheF1 plants revealed that the three interspecific crosses ,(G92xD.B27), (G93xD.B244) and (G94xD.B244) were the top performing and could be promising crosses.