FLORAL BIOLOGY OF OFF-SEASON JACKFRUIT IN SOUTH-WEST REGION OF BANGLADESH

M.A.  Mannan; K. M. Ashraful  Islam; M.R.  Islam; S.A.K.U.  Khan

doi:10.53808/KUS.SI.FRCC.2006.101-107-ls

Authors

M.A. Mannan Agrotechnology Discipline, Khulna University, Khulna-9208, Bangladesh
K. M. Ashraful Islam Agrotechnology Discipline, Khulna University, Khulna-9208, Bangladesh
M.R. Islam Agrotechnology Discipline, Khulna University, Khulna-9208, Bangladesh
S.A.K.U. Khan Agrotechnology Discipline, Khulna University, Khulna-9208, Bangladesh

DOI:

https://doi.org/10.53808/KUS.SI.FRCC.2006.101-107-ls

Keywords:

Floral biology, off-season, jackfruit.

Abstract

An investigation on floral biology of off-season jackfruit germplasms was carried out during mid July 2003 to mid November 2003 at the village Shakharipara, Rupdia, Jessore. This region is considered to be the largest jackfruit growing region of South-western region of Bangladesh. Six germplasms of more or less same aged have been selected for this study. The period for the floral bud development varied from 33 to 42 days with an average 36.8 days. Six distinct sequences of spike opening was observed on foot stalk. The availability of pollen grains and receptivity of female spike ranged from 3 to 6 days (average 4.5 days) and 8 to 12 days (average 10.26 days), respectively. Emergence of anther, stigma and dehiscence of anther occurred during day and at night. The peak emergence of anther and its dehiscence occurred during 2-4 A.M. and 4-6 P.M., respectively and the peak emergence of stigma at 8-10 A.M.

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