Relation between photosynthetic rate, translocation of assimilates and boll weight in upland cotton (Gossypium hirsutum, Linn.)

Adopting radioaasay technique, four cotton genotypes differing in boll weight were compared for CO₂ fixation rate and translocation of assimilates from the photosynthesising organs (leaf and bract). The variety ‘Lankart 3840’ had higher boll weight and recorded higher rates of CO₂ fixation by the bract and transfer of assimilates to the seeds in the developing boll than H 14 with lower boll weight.