Natural hybrids in Chamaecrista sect. Absus subsect. Baseophyllum (Leguminosae-Caesalpinioideae): genetic and morphological evidence |
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| Authors: | A de S Conceição L P de Queiroz E L Borba |
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| Institution: | (1) Departamento de Ciências Biológicas, Universidade Estadual de Feira de Santana, Feira de Santana, Bahia, Brazil;(2) Colegiado de Ciências, Universidade do Estado da Bahia, Campus VIII, Rua do Gangorra, 503, CHESF, Paulo Afonso, Bahia, 48608-290, Brazil;(3) Departamento de Botanica, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil |
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| Abstract: | Summary
Chamaecrista sect. Absus subsect. Baseophyllum (Leguminosae–Caesalpinioideae) includes eight species with geographic distribution concentrated in the Cadeia do Espinha?o
mountain range of the States of Bahia and Minas Gerais, in eastern Brazil. During the taxonomic revision of this group, individuals
were encountered with intermediate morphology between three sympatric species. Allozyme and multivariate morphometric analyses
were carried out to investigate the occurrence of hybridization between these species in four populations and 14 suspected
hybrid individuals between C. confertiformis and C. depauperata and between C. blanchetii and C. confertiformis. The results of both analyses support the occurrence of natural hybridization between them, and that all the individuals
with intermediate morphology are probably F1 hybrids. The hybrids are formally described as C. × blanchetiformis and C. ×patyensis. |
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| Keywords: | Allozymes Caesalpinioideae campos rupestres Chamaecrista Leguminosae hybridization morphometrics |
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