Abstract
Sex expression in mulberry (Morus spp.) was recorded in 301 varieties, collected from diverse geographical origins, evolved varieties and polyploids maintained at Central Sericultural Research and Training Institute, Berhampore, West Bengal. India (24°6'N and 88°15'E) during 1991–93. Out of total varieties, 49 (16%) male, 161 (53%) female, 52 (17%) monoecious and 39 (13%) were bisexual. Parameters on flowering time, anthesis, floral characters, sex expression and sex reversal were recorded. The indigenous, evolved and polyploids showed early flowering (Jan–Feb) and exotic showed late flowering (Jan–April). The pollen grain viability, seed setting % and other floral behaviour were recorded.
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