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|Type:||Artigo de periódico|
|Title:||Recombination Indices In Species Of Erythrina L. (leguminosae, Papilionoideae)|
Da Cruz N.D.
|Abstract:||Darlington's recombination indices were calculated for eight species of Erythrina by adding the mean chiasma frequency and the haploid chromosome number of each species. The recombination indices distinguished subgenus Erythraster (two species with greater mean chiasma frequency) from subgenera Micropteryx and Erythrina. This discrimination corroborates literature data on pollen morphology. It was not possible to separate groups at sectional level using recombination index. The recombination indices were also compared with data on breeding system and pollinators, available in literature, to investigate Grant's hypothesis on the occurrence of compensatory mechanisms in the regulation of recombination in plants. The data on breeding systems in Erythrina are very incomplete and it was not possible to correlate values of recombination indices with autogamy or allogamy. Species visited by hummingbirds showed lower recombination indices than species visited by other kind of pollinators.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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