Interspecific hybridization between Coffea arabica L. and tetraploid C. canephora P. Ex Fr. II. Meiosis in F1 hybrids and back crosses to C. Arabica |
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| Authors: | J. B. O. Owuor |
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| Affiliation: | (1) Coffee Research Station, P.O. Box 4, Ruiru, Kenya |
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| Abstract: | Summary Melosis was studied in Coffea arabica, in induced tetraploid C. canephora, in their F1 hybrid (arabusta hybrid) and in backcross generations of the hybrid with C. arabica as recurrent parent. Irregularities were observed, consisting of univalents (especially in the arabusta hybrid), multivalents (especially in tetraploid C. canephora) and uneven distribution of chromosomes at first anaphase. Chromosome distribution was improved by backcrossing. Meiotic irregularities wer negatively correlated with pollen fertility. |
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| Keywords: | Coffea arabica coffee induced tetraploid C. canephora interspecific hybrids arabusta hybrids meiosis chromosome association chromosome distribution fertility backcrossing |
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