Evaluation of some cotton (gossypium hirsutum l.) genotypes for yield, earliness and resistance to bacterial blight
2007
Mustafa, A.M., Agricultural Research Corpoation, Wad Medani (Sudan). Forage and Pasture Programme | Babiker, E.A., Agricultural Research Corpoation, Wad Medani (Sudan)
The objectives of this study were to evaluate ten cotton (Gossypium hirsutum L.) genotypes for seed cotton and lint yields, adaptability, stability, earliness and resistance to bacterial blight. The genotypes were grown under irrigation for two consecutive seasons (2002/03 and 2003/04) at five locations; namely, Gezira Research Station, Hag Abdalla, Suki, Rahad and New Halfa. Seed cotton yields ranged from 3212 to 2603 kg ha-I, and lint yields ranged from 1171 to 815 kg ha-I, with BB82 and BB90 strains demonstrating superiority over the commercial cultivars. BB82 and BB90 were the most stable and adaptable to the above mentioned cotton growing areas. BB82 was the earliest genotype, producing 69% of its total yield in the first pick. The genotypes BB72, BB82 and BB90 having, respectively, B2B3B6B7, B2B3B6B7 and B2B3B6B7B9 gene combinations showed resistance reaction to the new race of bacterial blight, whereas the commercial cultivars with B2B6 gene combination showed susceptible reaction. Evaluation at the five locations, over two years, indicated 20% increase in lint yield, 23% earliness and better improvement in resistance to bacterial blight in some of the studied genotypes over Barac (67) B the commercial cultivar
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