Tuesday, 26 May 2015

VRFBB-91: A French bean (Phaseolus vulgaris) germplasm for earliness

BK Singh
Vegetable Newsletter 1 (1): 5, 2014
E-mail: bksinghkushinagar@yahoo.co.in


French bean varieties developed by different organizations generally start pod setting during February to mid-March and very sparsely during first fortnight of December in North Indian plains. IIVR has recently identified a new genotype ‘VRFBB-91’ whose pods are ready to harvest during first fortnight of December. It has been collected from Jhum land of Kolasib, Mizoram. Plant growth is bush type, height ranged from 45-60 cm and bears pink colour flowers at 35-40 days after sowing. The pods of VRFBB-91 are green and bright in colour, fleshy, tender, straight, cylindrical, free from parchment and harvested usually about 9-12 days after flowering. The pod sieve size i.e. pods width (measuring through ventral to dorsal sutures) and pods thickness (measuring through sidewall to sidewall) both ranged from 0.82-0.88 cm, hence pod cross-sectional shape is round, a desirable trait of vegetable French bean. On an average, the weight and length of each tender pod is 6.6 g and 15.4 cm, respectively. The line bears 20-22 pods/plant and yields 140-150 g tender pods/plant in crop duration of 80-85 days. A pod contains about 6.7 seeds which is kidney shape, black in colour and 100 seeds’ weight is approximately 23.85. The yield potential (tender pods) of VRFBB-91 is 115-120 q/ha which is better than released varieties such as Kashi Sampann, Arka Komal, Arka Suvidha, Swarnaprya, Pant Anupma and Arka Anoop (25-50 q/ha).



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