Ecology, Environment and Conservation Paper

Vol. 29, Jan. Suppl. Issue 2023; Page No.(7-11)

SCREENING FOR DAYS TO FLOWERING AND PHOTOINSENSITIVITY IN VIGNA MUNGO

Sudhir Kumar, Kuldeep Kumar, Rahul Kumar, Jyotishree Pandey, Pritee Sagar,Meenal Rathore and Awnindra Kumar Singh

Abstract

Earliness and photo insensitivity is a crucial factor for accommodation of crops in different cropping systemsacross different agro ecological zones. In the current study we used a core set of 98 genotypes consisting ofgermplasm as well as released varieties of black gram to screen it for its response to photoperiodism. Dataon days to first flowering and days to fifty percent flowering (DFF) was noted for the individual lines in allthe three seasons (Kharif, late kharif, and zaid). An absolute mean difference for days to flowering in allpossible combinations and mean of all absolute mean differences were calculated. The core set of genotypesdisplay a huge difference in days to flowering, and thus their differential response to photoperiodism. Theset of genotypes were further categorized into early, medium and late flowering according to the meannumber of days required for flowering. A total of 32 early, 21 medium, and 2 late flowering lines wereidentified and were common across both season and years. Similarly, 13 photoperiod insensitive and 8photoperiod sensitive lines were identified for further validation and studies