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Journal of Biological Sciences
Year: 2002  |  Volume: 2  |  Issue: 7  |  Page No.: 444 - 445

Relationships in Anthesis, Maturity and Yield of Some Sunflower (Helianthus annuus Linnaeus, Compositae) Genotypes under Rainfed Conditions

Muhammad Aslam and Muhammad Ashfaq    

Abstract: Relationships in anthesis, maturity and yield of different sunflower genotypes were studied in fourteen sunflower genotypes. It was observed that in different genotypes of sunflower there were variations in days to anthesis and maturity and on an average basis the anthesis in different genotypes initiated in about 8.3571 ± 1.0082 weeks after sowing of crop (34th week of 2000) and the genotypes matured after an average of 14 ± 0.8771 weeks after sowing. This period needed for maturity falls in the range of less than 100-120 days generally needed for the maturity of this crop. There were variations in the yield of different genotypes and the genotypes were also evaluated on the basis of this component. The highest yield obtained was of the genotype 9705 (1711.11 kg ha -1) and the lowest of XF 263 (266.66 kg ha -1). On an average basis, the yield was concluded as 855.0686 kg ha -1 and this yield falls in the range generally recorded from the rainfed sunflower crops. These studies concluded positive and significant correlation in weeks to anthesis, maturity and yield at 0.01 and 0.05 levels and the former two influenced the sunflower grain yield positively and significantly.

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