Abstract: That the some characters of cotton bolls which grew in the same sets of cotton plants of different sowing made contribution to boll weight and lint percentage was studied by means of correlation and path coeffient analysis. The relations of boll characters with the principal climatic factors were analysedo It was found that the temperatures during boll development was the most important factor affecting development of bolls. The effects of average' day and night temperatures, maximum and minimum temperatures during this period and the mean temperature during earlier and later periods of boll development on boll weight, lint percentage, seed index and lint index were also discussed.

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