Cytogenetics and reproductive biology of bele (Abelmoschus manihot Linn., Medic sub-species manihot) cultivars
2001
Tyagi, A.P. (The Univ. of the South Pacific, P.O. Box 1168, Suva (Fiji). Dept. of Biology, School of Pure and Applied Sciences)
Four locally grown (from Fiji Islands) and three imported (from Papua New Guinea), a total of seven Bele (Abelmoschus manihot Linn., Medic sub-species manihot) cultivars were investigated for their cytogenetics and reproductive biology. Due to very small size of chromosomes, it was difficult to count the chromosomes. However, chromosome counting from flower buds and root tips showed that chromosome number in all the seven cultivars does not exceed 2n=66. It was fairly well established that diploid chromosome number in these cultivars was 66. Pollen viability in all the seven cultivars was high; exceeding 85% from pollen staining technique and 78% from pollen pollen germination technique. All the seven Bele cultivars were fully self compatible. Cross-compatibility among four local cultivars was very high. Same was true for three Papua New Guinea cultivars. However cross compatibility between local (Fijian) cultivars and cultivars from Papua New Guinea was partial indicating some degree of genetic differences between cultivars from Fiji and Papua New Guinea. Procedure such as cutting the style shorter and placing pollen grains to enhance and affect fertilization to get cross seeds were suggested
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