Abstract
Cytological analysis of eight interspecific hybrids ofPhalaenopsis, (2n=38), intra-as well as intersectional, involving eight species, revealed various degrees of genome homology. The species can be divided into two groups. Within each of the groups a strong genome homology occurs. The first group comprises the speciesP. amabilis, P. stuartiana, P. sanderiana, P. aphrodite andP. equestris, all having similar genomes of small chromosomes. The second group includesP. lueddemanniana, P. mannii andP. amboinensis, having genomes comprising larger chromosomes. In addition, the genomes of the latter three species have a different average chromosome size. Cytological evidence for differences in length at somatic metaphase as well as in metaphase I configurations in hybrids of species of the second group is presented. Hybrids between representative species of the first and the second group show poor to fair genome homology. The implications of the cytological observations for the classification ofPhalaenopsis are discussed.
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This research was supported by grants toDr. Y. Sagawa and forms part of a thesis submitted by the author in partial fulfillment of the requirements for a MS degree at the University of Hawaii (1968).
Journal Series No. 1161 of the Hawaiian Agricultural Experiment Station.
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Arends, J.C. Cytological observations on genome homology in eight interspecific hybrids ofPhalaenopsis . Genetica 41, 88–100 (1970). https://doi.org/10.1007/BF00958896
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DOI: https://doi.org/10.1007/BF00958896