Cross compatibility between Abelmoschus esculentus and A. moschatus |
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| Authors: | M Abdullah Yousuf Akhond M Abul Hossain Molla M Obaidul Islam Mohammad Ali |
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| Institution: | (1) Biotechnology Division, Bangladesh Agricultural Research Institute, Gazipur, 1701, Bangladesh;(2) Department of Crop Botany, Bangladesh;(3) Plant Genetic Resources Centre, Bangladesh Agricultural Research Institute, Gazipur, 1701, Bangladesh;(4) Department of Genetics and Plant Breeding, Institute of Postgraduate Studies in Agriculture, Gazipur, 1703, Bangladesh |
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| Abstract: | Interspecific cross compatibility between cultivated and wild okra (Abelmoschus esculentus and A. moschatus) and pollen tube growth behaviour in the crosses among a local cultivar of A. esculentus, A. moschatus and their F1s were studied. Fruit set was observed in all the crosses except one and seed setting was absent in two of the crosses which
set fruit. All seed produced were shrivelled but F1 plants were obtained from two crosses where cultivated okra was used as the seed parent. The F1 plants were perennial in nature with very low pollen viability and seed set. A high percentage of pollen germination and
profuse pollen tube penetration in the style were observed in the cross A. esculentus × A. moschatus but low pollen tube penetration with abnormal pollen tubes was observed in the reciprocal cross. The number
of pollen tubes was very low but they appeared to be normal in the backcross A. esculentus × F1, but were generally abnormal in the reciprocal cross. Both pre- and postzygotic barriers seemed to occur in crosses between
the two species. The present studies indicate that these barriers can be overcome and desirable characters from A. moschatus transferred to cultivated okra using conventional hybridisation techniques.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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| Keywords: | Abelmoschus esculentus A moschatus cross compatibility okra pollen tube |
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