STUDY OF FLOWERING PATTERN AND REPRODUCTIVE EFFICIENY IN MUNGBEAN

Abstract

A pot experiment was conducted at the Iangladesh InsLitute ol Nuclear ALricutture. Mvrnensingh, during September to November 2007 to investigate flower production, tiowering pattern, reproductive eliieienev. yield attributes and their relationship with seed yield in 10 munghean genotypes. The experiment was laid out in a Completely Randomized Design with Ibur replications. High yielding genotypes produced greater number ol opened flowers (range 34.2-45.0 plani1 ) having longer flowering duration (range 15-I8 days) than the low yielding ones. In contrast, low, yielding genotypes produced fewer opened flowers (range 16.1-2] .0 Plant) and also .4   showed shorter flowering duration (range II - IS days) except M13-46 (21 days). I ugh yielding genotypes had higher flower production rate over time than the low yielding ones and maximum flower production occurred within 10-12 days after flowering started. 1-lowever. high yielding genotypes had inferior performance in reproductive eliieicncy (range 52.6-61 .4Q/0) than in low yielding ones (59.5-812%) indicating that there Was a scope of increasing yield by improving the reproductive efficiency in high yielding genotypes in rnungbean. Iligh yielding genotypes maintained increased teal area. TDM. increased flowers and pod numbers plani'. In contrast, low yielding genotypes produced shorter and narrower plant canopy, tower flowers and pods plani'. Seed yield had highly significant and positive correlation with pod number (r = 0.89**) and pod number depended on leaf area (r = 0.75**), TDM (r = 0.84**). raceme (r 0.76*) and flower number (r 0.87*t). Genotypes ML3-l7 and ?v113-35 showed better perlormance in respect of growth, reproductive, yield and yield contributing characters.