Jute Agricultural Research Institute, Barrackpore, West Bengal
*Present address: Central Plantation Crops Research Institute, Regional Station, Calicut, Kerala. 673 011
Eight genotypes of jute [Cor chorus sp.) were tested under 5 dates of sowing from mid-February to mid-April of 1972 and 1973 for photoperiod-insensitivity. The percentages of prematurely flowering plants were 50, 46 and 7 for mid-February, beginning of March and mid-March sowings respectively with no premature flowering in April sowing.
Among the genotypes, ‘Tanzania-1’ had the best photoperiod-insensitivity with only 2% prematurely flowering plants in early sowings. This strain offers good scope for further improving the photoperiod-insensitivity of the existing high yielding varieties of olitorius.
The percentage of prematurely flowering plants in early sowings were 20 to 45 in capsularis varieties; these varieties need further improvement in photoperiod-insensitivity.
