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Item Chloroplast as an indicator for identification of polyploidy in abelmoschus(Kerala Agricultural University, 1989) Suresh Babu, K V; Dutta, O PItem Cytogenetic studies of the F1 hybrid Abelmoschus esculentus X A, tetraphyllus and its amphidiploid(Kerala Agricultural University, 1990) Suresh Babu, K V; Dutta, O PThe FI hybrids, (A.esculentus x A. tetraphyllus resembled the wild parent and exhibited hybrid vigour. Its meiosis was abnormal snowing more of univalents and less of bivalents and was completely sterile. The amphidiploid (A. csculentus-tctraphyllus) obtained through colchicine treatment was fully fertile. It showed a low multivalent formation during meiosis and can survive as a new synthetic species. The practical value of the amphidiploid in okra breeding has been indicated.