FLOWERING, FRUITING AND PHYSIO-CHEMICAL PROPERTIES OF JAMUN (SYZYGIUM CUMINI?SKEELS) GROWN IN NADIA DISTRICT OF WEST BENGAL

摘要

A study was conducted to identify the elite jamun germplasm among its natural population from different locations of Nadia district of West Bengal.Jamun trees in 50 different locations were initially screened for their fruit quality characters out of which 12 elite germplasm were selected for detailed studies including flowering, fruiting and fruit biochemical properties.The 12 different elite class germplasm were evaluated for flowering characters like number of flowering flushes, peak flowering time, peak fruiting season, second flowering season, overall abundance of flowering, flower colour, number of flowers / inflorescence.Acc.8 is known to have unique character of flowering and fruiting twice.Acc.6 and Acc.10 showed a very late flowering and fruiting.High number of flowers / inflorescence was observed in Acc.7, Acc.12 and Acc.11.Long sized jamun accessions were Acc.8, Acc.6, Acc.4 and Acc.11.A very high pulp % of 76.61% was observed in Acc.11 followed by Acc.7.Acc.8, Acc.6 and Acc.4.Considerably high yield of 45.24 kg/tree were observed in Acc.10, Acc.11, Acc.8, Acc.5, Acc.4 and Acc.1 respectively.Highest value of TSS was observed in Acc.8 followed by Acc.7 and Acc.6.Highest value of titratable acidity (%) was observed in Acc.10 followed by Acc.2 and Acc.9.Total sugar content in jamun fruits were maximum in Acc.8, Acc.7 and Acc.6.Ascorbic acid content was highest in Acc.8, Acc.7, Acc.2, Acc.4, Acc.1, Acc.12 and Acc.3.Anthocyanin was highest in Acc.8 followed by Acc.1, Acc.11 and Acc.10.Overall the Acc.7 and Acc.8 collected from Chakdah and Krishnanagar-1 were found to be possessing the most desirable qualitative characteristics and can be harnessed for conservation and further breeding purpose.