Octoploidy in Coffee arabica
Morphology and cytology of three octoploid forms of Coffea arabica were studied. A comparison of the morphological characters of natural allotetraploids and the derived octoploids indicates that there is a reduction in size from tetraploidy to octoploidy. The inferiority in vegetative vigour and high sterility of the octoploids suggests that the optimum chromosome number has been reached in nature at the tetraploid level. Occurrence of a high frequency of quadrivalents in meiosis of the octoploids presently studied is contrary to the reports of earlier workers where quadrivalents were not observed. The significance of quadrivalent formation is discussed
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| Format: | biblioteca |
| Published: |
1969
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| Subjects: | COFFEA ARABICA, GENETICA, POLIPLOIDIA, CROMOSOMAS, NUMERO DE CROMOSOMAS, CITOLOGIA, |
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