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Thereisnonamedvarietyorcultivarinbaellikeotherfruitcrops.Mostlylocalselectionshavingdesirabletraits areutilizedforplanting.Therefore,itsbreedingiscrucialforcreatingnewimprovedvarieties.Aneffectivemethod for generating variety and choosing superior plants appears to be mutation breeding. The current study was conductedinJuly2022attheUttarBangaKrishiViswavidyalayaatPundibariFacultyofHorticulturePomology and Post-Harvest Technology Laboratory and Teaching Farm. 100 numbers of Bael (Aegle marmelos Correa.) seedstreatedindifferentconcentrationofEMS(0.25%,0.50%,0.75%and1.00%)andColchicine(0.25%,0.50%, 0.75%and1.00%)alongwithcontrolwith4replicationsfollowingrandomizedblockdesign.Thestudyindicated thatthepercentageofseedgerminationwasdecreasedwithincreasingconcentrationsanddoses,whencompared tothecontrol.Onthebasisofthepercentageofgerminationofseeds,theLD 50 (Lethaldosage)valuewascalculated. The 50% decrease in seed germination was seen in both the 0.75% of EMS (T 4 ) and 1.00% in Colchicine (T 5 ) treatments,andregardedastheLD 50 valueforboth.Themaximumshootlength,rootlength,seedlinglengthand seedlingsurvival%wereobservedin0.25%EMS(T 2 )whereas,rootlengthandseedlingsurvival%in0.25%of colchicines (T 2 ) but shoot length, total seedling length and numbers of leaves in 0.75% (T 3 ). The lowest were observed in 1.00% of Ethyl Methane Sulfonate and Colchicine.

An experiment was carried out in the Department of Forestry, Uttar Banga Krishi Viswavidyalaya, Cooch Behar to study the influence of different pre-sowing treatments on seed germination of bakul (Mimusops elengi L.), an evergreen tree species belonging to family Sapotaceae. The present experiment was focused on the pre-sowing treatments for breaking dormancy of this species which hindered germination by the presence of a hard seed coat comprising of nine treatments and three replications following randomized block design. Among the different pre-sowing treatments, 0.5% thiourea and 1% potassium nitrate recorded maximum germination percentage (85%). Least mean germination time (30.96 days) was also found in seeds treated with 0.5% thiourea.

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